Electronic Materials and Devices (EMaD) Laboratory

Novel Optoelectronic Devices Through Materials Innovation



Journal Publications

    2025

  1. "Ex-situ Doping of Polysilicon Hole Contacts for Silicon Solar Cells via Electron-Beam Boron Evaporation"
    - Solar Energy Materials and Solar Cells -
    Yida Pan, Di Yan, Zhongshu Yang, Di Kang, Sergey Rubanov, Jiali Wang, Peiting Zheng, Jie Yang, Xinyu Zhang, James Bullock
  2. "Statistical Methods for Assessment of Energy Harvesting Performance in Unconventional Photovoltaics"
    - Solar Energy -
    Mikhail Vasiliev, Victor Rosenberg, James Bullock, Paul Mulvaney
  3. "Ultraviolet Laser Activation of Phosphorus‐Doped Polysilicon Layers for Crystalline Silicon Solar Cells"
    - Advanced Materials Interfaces -
    Yijun Wang, Di Yan, Jesús Ibarra Michel, Sanje Mahasivam, Vipul Bansal, Robert Delaney, Jiali Wang, Thien Truong, Peiting Zheng, Jie Yang, Xinyu Zhang, James Bullock

    4. 2024

  4. "Black Phosphorus for Mid-Infrared Optoelectronics: Photophysics, Scalable Processing, and Device Applications"
    - Nano Letters -
    Naoki Higashitarumizu, Shu Wang, Shifan Wang, Hyungjin Kim, James Bullock, Ali Javey
  5. "Scalable Fabrication of Black Phosphorous Films for Infrared Photodetector Arrays"
    - Advanced Science -
    Alexander Corletto, Purevlkham Myagmarsereejid, Shifan Wang, Wei Yan, Sivacarendran Balendhran, Huan Liu, Yu Lin Zhong, Kenneth B. Crozier, Munkhbayar Batmunkh, James Bullock
  6. "A Quasi-Ohmic Back Contact Achieved by Inserting Single-Crystal Graphene in Flexible Kesterite Solar Cells"
    - arXiv Condensed Matter -
    Yixiong Ji, Wentong Yang, Di Yan, Wei Luo, Jialu Li, Shi Tang, Jintao Fu, James Bullock, Mei Gao, Xin Li, Zhancheng Li, Jun Yang, Xingzhan Wei, Haofei Shi, Fangyang Liu, Paul Mulvaney
  7. "Improved Efficiency in WSe2 Solar Cells Using Amorphous InOx Heterocontacts"
    - ACS Nano -
    Shifan Wang, Di Yan, Jesús Ibarra Michel, Alexander Corletto, Ary Anggara Wibowo, Sivacarendran Balendhran, Ha Young Lee, Sujeong Byun, Sejeong Kim, Kenneth B. Crozier, Peter C Sherrell, Daniel Macdonald, James Bullock
  8. "Plasmonic Gold Nanoparticle-Decorated Ultrathin SnO2 Nanosheets with Superior Ultraviolet and Visible Photoresponsivity"
    - ACS Applied Nano Materials -
    Nitu Syed, Gus O Bonin, Chung Kim Nguyen, Mei Xian Low, Jiajun Meng, Ali Zavabeti, Billy James Murdoch, Anthony SR Chesman, Shifan Wang, Pallavi Punj, Kibret A Messalea, Sumeet Walia, James Bullock, Kenneth B. Crozier, Daniel E Gómez, Ann Roberts
  9. "Understanding and Controlling Electrostatic Discharge in Triboelectric Nanogenerators"
    - ChemSusChem -
    Ronald T Leon, Peter C Sherrell, Jesús Ibarra Michel, James Bullock, Joseph D Berry, Amanda V Ellis
  10. "Current Status and Challenges for Hole-Selective Poly-Silicon Based Passivating Contacts"
    - Applied Physics Reviews -
    Rabin Basnet, Di Yan, Di Kang, Mohamed M Shehata, Pheng Phang, Thien Truong, James Bullock, Heping Shen, Daniel Macdonald
  11. "Over 29%-Efficient, Stable n-i-p Monolithic Perovskite/Silicon Tandem Solar Cells Based on Double-Sided Poly-Si/SiO2 Passivating Contact Silicon Cells"
    - Journal of Materials Chemistry A -
    Leiping Duan, Sieu Pheng Phang, Di Yan, Josua Stuckelberger, Daniel Walter, Yihui Hou, Wei Wang, Nathan Chang, Anh Dinh Bui, Azul Osorio Mayon, Lichun Chang, Di Kang, Rabin Basnet, Hieu Nguyen, Thomas White, James Bullock, Klaus Weber, Daniel MacDonald, Kylie Catchpole, Heping Shen
  12. "Electrostatically Induced Black Phosphorus Infrared Photodiodes"
    - Advanced Functional Materials -
    Wei Yan, Shifan Wang, Kaijian Xing, Sivacarendran Balendhran, Mike Tebyetekerwa, Kenji Watanabe, Takashi Taniguchi, Michael S Fuhrer, Kenneth B. Crozier, James Bullock
  13. "Colloidal Quantum Dots as Single Photon Sources"
    - Journal of Materials Chemistry C -
    Damian Nelson, Sujeong Byun, James Bullock, Kenneth B. Crozier, Sejeong Kim
  14. "A Predictive Model for Monolayer‐Selective Metal‐Mediated MoS2 Exfoliation Incorporating Electrostatics"
    - Advanced Materials Interfaces -
    Alexander Corletto, Marco Fronzi, Alexis Krywula Joannidis, Peter C Sherrell, Michael J Ford, David A Winkler, Joseph G Shapter, James Bullock, Amanda V Ellis

    15. 2023

  15. "Transferable Highly (001) Oriented Sb2Se3 Nanorod Films on Flexible Substrates for Innovative Optoelectronic Devices"
    - Advanced Materials Interfaces -
    Joao Otavio Mendes, Gabriel Aygur, Jesús Ibarra Michel, James Bullock, Daniel Gómez, Enrico Della Gaspera, Joel van Embden
  16. "An ITO‐Free Kesterite Solar Cell"
    - Small -
    Yixiong Ji, Wangxian Chen, Di Yan, James Bullock, Yang Xu, Zhenghua Su, Wentong Yang, Jamie Stuart Laird, Tian Zheng, Na Wu, Wusong Zha, Qun Luo, Chang‐Qi Ma, Trevor A Smith, Fangyang Liu, Paul Mulvaney
  17. "Detecting Driving Potentials at The Buried SiO2 Nanolayers in Solar Cells by Chemical-Selective Nonlinear X-Ray Spectroscopy"
    - Applied Physics Letters -
    Masafumi Horio, Toshihide Sumi, James Bullock, Yasuyuki Hirata, Masashige Miyamoto, Bailey R Nebgen, Tetsuya Wada, Tomoaki Senoo, Yuki Tsujikawa, Yuya Kubota, Shigeki Owada, Kensuke Tono, Makina Yabashi, Takushi Iimori, Yoshihiro Miyauchi, Michael W Zuerch, Iwao Matsuda, Craig P Schwartz, Walter S Drisdell
  18. "Electron Contact Interlayers for Low‐Temperature‐Processed Crystalline Silicon Solar Cells"
    - Progress in Photovoltaics: Research and Applications -
    Jesús Ibarra Michel, Anh Huy Tuan Le, Di Yan, Willem‐Jan Berghuis, Lars Korte, Anyao Liu, Sieu Pheng Phang, Wenhao Chen, Daniel Macdonald, Bart Macco, Ziv Hameiri, James Bullock
  19. "Flexible Vanadium Dioxide Photodetectors for Visible to Longwave Infrared Detection at Room Temperature"
    - Advanced Functional Materials -
    Sivacarendran Balendhran, Mohammad Taha, Shifan Wang, Wei Yan, Naoki Higashitarumizu, Dingchen Wen, Nima Sefidmooye Azar, James Bullock, Paul Mulvaney, Ali Javey, Kenneth B. Crozier
  20. "Room Temperature Bias-Selectable, Dual-Band Infrared Detectors Based on Lead Sulfide Colloidal Quantum Dots and Black Phosphorus"
    - ACS Nano -
    Shifan Wang, Arun Ashokan, Sivacarendran Balendhran, Wei Yan, Brett C Johnson, Alberto Peruzzo, Kenneth B. Crozier, Paul Mulvaney, James Bullock
  21. "Poly-Si Passivating Contacts Prepared via Phosphorus Spin-On-Doping: A Comparison Between Different Silicon Deposition Methods"
    - Solar Energy Materials and Solar Cells -
    Jesús Ibarra Michel, Di Yan, Sieu Pheng Phang, Tian Zheng, Brett C Johnson, Jie Yang, Xinyu Zhang, Wenhao Chen, Yimao Wan, Thien Truong, Josua Stuckelberger, Yida Pan, Daniel Macdonald, James Bullock
  22. "Gap‐Surface Plasmon‐Enhanced Photoluminescence of InSe"
    - physica status solidi (b) -
    Ha Young Lee, Damian Nelson, Wei Yan, Kenneth B. Crozier, James Bullock, Sejeong Kim
  23. "Effect of Al Electrodes on Surface Passivation of TiOx Selective Heterocontacts for Si Solar Cells"
    - physica status solidi -
    Wensheng Liang, Parvathala Narangari, Jingnan Tong, Jesús Ibarra Michel, Billy J Murdoch, Hang Cheong Sio, Teng Kho, Felipe Kremer, Stephane Armand, Keith McIntosh, James Bullock, Kean Chern Fong
  24. "A Predictive Model for Monolayer‐Selective Metal‐Mediated MoS2 Exfoliation Incorporating Electrostatics"
    - Advanced Materials Interfaces -
    Alexander Corletto, Marco Fronzi, Alexis Krywula Joannidis, Peter C Sherrell, Michael J Ford, David A Winkler, Joseph G Shapter, James Bullock, Amanda V Ellis
  25. "Long Duration Persistent Photocurrent in 3 nm Thin Doped Indium Oxide for Integrated Light Sensing and In‐Sensor Neuromorphic Computation"
    - Advanced Functional Materials -
    Aishani Mazumder, Chung Kim Nguyen, Thiha Aung, Mei Xian Low, Md Ataur Rahman, Salvy P Russo, Sherif Abdulkader Tawfik, Shifan Wang, James Bullock, Vaishnavi Krishnamurthi, Nitu Syed, Abhishek Ranjan, Ali Zavabeti, Irfan H Abidi, Xiangyang Guo, Yongxiang Li, Taimur Ahmed, Torben Daeneke, Akram Al‐Hourani, Sivacarendran Balendhran, Sumeet Walia
  26. "Infrared Modulation via Near-Room-Temperature Phase Transitions of Vanadium Oxides & Core-Shell Composites"
    - Journal of Materials Chemistry A -
    Mohammad Taha, Sivacarendran Balendhran, Peter C Sherrell, Nick Kirkwood, Dingchen Wen, Shifan Wang, Jiajun Meng, James Bullock, Kenneth B. Crozier, Len Sciacca
  27. "Stability Challenges for The Commercialization Of Perovskite-Silicon Tandem Solar Cells"
    - Nature Reviews Materials -
    Leiping Duan, Daniel Walter, Nathan Chang, James Bullock, Di Kang, Sieu Pheng Phang, Klaus Weber, Thomas White, Daniel Macdonald, Kylie Catchpole, Heping Shen
  28. "Integration of Black Phosphorus Photoconductors with Lithium Niobate on Insulator Photonics"
    - Advanced Optical Materials -
    Shifan Wang, Robert James Chapman, Brett C Johnson, Inna Krasnokutska, Jean‐Luc J Tambasco, Kibret Messalea, Alberto Peruzzo, James Bullock

    29. 2022

  29. "Effect of Al Electrodes on Surface Passivation of TiOx Selective Heterocontacts for Si Solar Cells"
    - physica status solidi rrl -
    Wensheng Liang, Parvathala Narangari, Jingnan Tong, Jesús Ibarra Michel, Billy J Murdoch, Hang Cheong Sio, Teng Kho, Felipe Kremer, Stephane Armand, Keith McIntosh, James Bullock, Kean Chern Fong
  30. "Twist Angle Effects on the Absorbance, Carrier Lifetime, and Diffusion Properties in Low Dimension Type‐II MoS2/WS2 Heterobilayers"
    - Advanced Materials Interfaces -
    Mike Tebyetekerwa, Thien N Truong, Wei Yan, Cheng Tang, Ary Anggara Wibowo, James Bullock, Aijun Du, Cheng Yan, Daniel Macdonald, Hieu T Nguyen
  31. "Temperature‐Dependent Performance of Silicon Heterojunction Solar Cells with Transition‐Metal‐Oxide‐Based Selective Contacts"
    - Progress in Photovoltaics -
    Anh Huy Tuan Le, Julie Dréon, Jesús Ibarra Michel, Mathieu Boccard, James Bullock, Nino Borojevic, Ziv Hameiri
  32. "Imaging Current Paths in Silicon Photovoltaic Devices with a Quantum Diamond Microscope"
    - Physical Review Applied -
    S.C. Scholten, G.J. Abrahams, B.C. Johnson, A.J. Healey, I.O. Robertson, D.A. Simpson, A. Stacey, S. Onoda, T. Ohshima, T.C. Kho, J. Ibarra Michel, J. Bullock, L.C.L. Hollenberg, and J.-P. Tetienne
  33. "Progress and Future Prospects of Wide-Bandgap Metal-Compound-Based Passivating Contacts for Silicon Solar Cells"
    - Advanced Materials -
    Kun Gao, Qunyu Bi, Xinyu Wang, Wenzhu Liu, Chunfang Xing, Kun Li, Dacheng Xu, Zhaojun Su, Cheng Zhang, Jian Yu, Dongdong Li, Baoquan Sun, James Bullock, Xiaohong Zhang, Xinbo Yang
  34. "Infrared Photodetectors Based on 2D Materials and Nanophotonics"
    - Advanced Functional Materials -
    Jiajia Zha, Mingcheng Luo, Ming Ye, Tanveer Ahmed, Xuechao Yu, Der-Hsien Lien, Qiyuan He, Dangyuan Lei, Johnny C. Ho, James Bullock, Kenneth B. Crozier, Chaoliang Tan
  35. "Silicon Solar Cells with Passivating Contacts: Classification and Performance"
    - Progress in Photovoltaics -
    Di Yan, Andrés Cuevas, Josua Stuckelberger, Er-Chien Wang, Sieu Pheng Phang, Teng Choon Kho, Jesús Ibarra Michel, Daniel Macdonald, James Bullock
  36. "Carrier-Selective Contacts Using Metal Compounds for Crystalline Silicon Solar Cells"
    - Progress in Photovoltaics -
    Jesús Ibarra Michel, Julie Dréon, Mathieu Boccard, James Bullock, Bart Macco

    37. 2021

  37. "Visible to Short-Wave Infrared Photodetectors Based on ZrGeTe4 van der Waals Materials"
    - ACS Applied Materials & Interfaces -
    Wei Yan, Brett C. Johnson, Sivacarendran Balendhran, Jasper Cadusch, Di Yan, Jesús Ibarra Michel, Shifan Wang, Tian Zheng, Kenneth B. Crozier, James Bullock
  38. "Copper Tetracyanoquinodimethane (CuTCNQ): A Metal–Organic Semiconductor for Room-Temperature Visible to Long-Wave Infrared Photodetection"
    - ACS Applied Materials & Interfaces -
    Sivacarendran Balendhran, Zakir Hussain, Vivek R. Shrestha, Jasper Cadusch, Ming Ye, Nima Sefidmooye Azar, Hyungjin Kim, Rajesh Ramanathan, James Bullock, Ali Javey, Vipul Bansal, and Kenneth B. Crozier
  39. "Polysilicon Passivated Junctions: The Next Technology for Silicon Solar Cells?"
    - Joule -
    Di Yan, Andrés Cuevas, Jesús Ibarra Michel, Chun Zhang, Yimao Wan, Xinyu Zhang, James Bullock
  40. "Light–Matter Interaction Enhancement in Anisotropic 2D Black Phosphorus via Polarization-Tailoring Nano-Optics"
    - ACS Photonics -
    Nima Sefidmooye Azar, James Bullock, Sivacarendran Balendhran, Hyungjin Kim, Ali Javey, Kenneth B. Crozier
  41. "Long-Wave Infrared Photodetectors Based on 2D Platinum Diselenide atop Optical Cavity Substrates"
    - ACS Nano -
    Nima Sefidmooye Azar, James Bullock, Vivek Raj Shrestha, Sivacarendran Balendhran, Wei Yan, Hyungjin Kim, Ali Javey, Kenneth B. Crozier

    42. 2020

  42. "Spectrally Selective Mid-Wave Infrared Detection Using Fabry-Pérot Cavity Enhanced Black Phosphorus 2D Photodiodes"
    - ACS Nano -
    Wei Yan, Vivek Raj Shresha, Quentin Jeangros, Nima Sefidmooye Azar, Sivacarendran Balendhran, Christophe Ballif, Kenneth B. Crozier, James Bullock
  43. "Mid- to Long-Wave Infrared Computational Spectroscopy with a Graphene Metasurface Modulator"
    - Nature: Scientific Reports -
    Vivek Raj Shrestha, Benjamin Craig, Jiajun Meng, James Bullock, Ali Javey, Kenneth B. Crozier
  44. "21.3%-Efficient n-type Silicon Solar Cell with a Full Area Rear TiOx/LiF/Al Electron-Selective Contact"
    - Solar Energy Materials and Solar Cells -
    Wenjie Wang, Jian He, Di Yan, Chris Samundsett, Sieu Pheng Phang, Zengguang Huang, Wenzhong Shen, James Bullock, Yimao Wan

    45. 2019

  45. "Passivating Contacts for Crystalline Silicon Solar Cells"
    - Nature Energy -
    Thomas G Allen, James Bullock, Xinbo Yang, Ali Javey, Stefaan De Wolf
  46. "Machine Learning Optimization of p-Type Transparent Conducting Films"
    - Chemistry of Materials -
    Lingfei Wei, Xiaojie Xu, Gurudayal, James Bullock, Joel W Ager
  47. "Optical and Electrical Properties of Two-Dimensional Palladium Diselenide"
    - Applied Physics Letters -
    George Zhang, Matin Amani, Apoorva Chaturvedi, Chaoliang Tan, James Bullock, Xiaohui Song, Hyungjin Kim, Der-Hsien Lien, Mary C Scott, Hua Zhang, Ali Javey
  48. "15% Efficiency Ultrathin Silicon Solar Cells with Fluorine-Doped Titanium Oxide and Chemically Tailored Poly(3,4-ethylenedioxythiophene):Poly(styrenesulfonate) as Asymmetric Heterocontact"
    - ACS Nano -
    Jian He, Md Anower Hossain, Hao Lin, Wenjie Wang, Siva Krishna Karuturi, Bram Hoex, Jichun Ye, Pingqi Gao, James Bullock, Yimao Wan
  49. "In Situ Transmission Electron Microscopy Study of Molybdenum Oxide Contacts for Silicon Solar Cells"
    - physica status solidi (a) -
    Haider Ali, Supriya Koul, Geoffrey Gregory, James Bullock, Ali Javey, Akihiro Kushima, Kristopher O Davis
  50. "Dip Coating Passivation of Crystalline Silicon by Lewis Acids"
    - ACS Nano -
    Wenbo Ji, Yingbo Zhao, Hossain M. Fahad, James Bullock, Thomas Allen, Der-Hsien Lien, Stefaan De Wolf, Ali Javey
  51. "Si Photocathode with Ag-Supported Dendritic Cu Catalyst for CO2 Reduction"
    - Energy & Environmental Science -
    Gurudayal Gurudayal, Jeffrey W Beeman, James Bullock, Hao Wang, Johanna Eichhorn, Clarissa M Towle, Ali Javey, Francesca Maria Toma, Nripan Mathews, Joel W Ager
  52. "Dopant-Free Partial Rear Contacts Enabling 23% Silicon Solar Cells"
    - Advanced Energy Materials -
    James Bullock, Yimao Wan, Mark Hettick, Xu Zhaoran, Sieu Pheng Phang, Di Yan, Hanchen Wang, Wenbo Ji, Chris Samundsett, Ziv Hameiri, Daniel Macdonald, Andrés Cuevas, Ali Javey
  53. "In Situ Transmission Electron Microscopy Study of Molybdenum Oxide Contacts for Silicon Solar Cells"
    - Phys. Status Solidi -
    Haider Ali, Supriya Koul, Geoffrey Gregory, James Bullock, Ali Javey, Akihiro Kushima, Kristopher O. Davis

    54. Pre-2019

  54. "Polarization-Resolved Black-Phosphorous/Molybdenum Disulfide Mid-Wave Infrared Photodiodes with High Detectivity at Room Temperature"
    - Nature Photonics, 2018 -
    James Bullock, Matin Amani, Joy Cho, Yu-Ze Chen, Geun Ho Ahn, Valerio Adinolfi, Vivek Shrestha, Yang Gao, Kenneth B. Crozier, Yu-Lun Chueh, Ali Javey
  55. "Solution-Synthesized High-Mobility Tellurium Nanoflakes for Short-Wave Infrared Photodetectors"
    - ACS Nano, 2018 -
    Matin Amani, Chaoliang Tan, George Zhang, Chunsong Zhao, James Bullock, Xiaohui Song, Hyungjin Kim, Vivek Raj Shrestha, Yang Gao, Kenneth B. Crozier, Mary Scott, A. Javey
  56. "A Wearable Microfluidic Sensing Patch for Dynamic Sweat Secretion Analysis"
    - ACS Sensors, 2018 -
    Hnin Y. Y. Nyein, Li-Chai Tai, Quynh P. Ngo, Minghan Chao, George Zhang, Wei Gao, Mallika Bariya, James Bullock, Hyungjin Kim, Hossain M. Fahad, Ali Javey
  57. "Temperature and Humidity Stable Alkali/Alkaline‐Earth Metal Carbonates as Electron Heterocontacts for Silicon Photovoltaics"
    - Advanced Energy Materials, 2018 -
    Yimao Wan, James Bullock, Mark Hettick, Zhaoran Xu, Chris Samundsett, Di Yan, Jun Peng, Ali Javey, Andrés Cuevas
  58. "Zirconium Oxide Surface Passivation of Crystalline Silicon"
    - Applied Physics Letters, 2018 -
    Yimao Wan, James Bullock, Mark Hettick, Zhaoran Xu, Di Yan, Jun Peng, Ali Javey, Andrés Cuevas
  59. "Stable Dopant-Free Asymmetric Heterocontact Silicon Solar Cells with Efficiencies Above 20%"
    - ACS Energy Letters, 2018 -
    James Bullock, Yimao Wan, Xu Zhaoran, Stephanie Essig, Mark Hettick, Hanchen Wang, Wenbo Ji, Mathieu Boccard, Andrés Cuevas, Christophe Ballif, Ali Javey
  60. "Solution-processed Transparent Self-powered p CuS ZnS/n-ZnO UV Photodiode"
    - physica status solidi: rrl, 2017 -
    Xiaojie Xu, Sudhanshu Shukla, Ya Liu, Binbin Yue, James Bullock, Longxing Su, Yanmei Li, Ali Javey, Xiaosheng Fang, Joel W. Ager
  61. "Tantalum Oxide Electron-Selective Heterocontacts for Silicon Photovoltaics and Photoelectrochemical Water Reduction"
    - ACS Energy Letters, 2017 -
    Yimao Wan, Siva Krishna Karuturi, Chris Samundsett, James Bullock, Mark Hettick, Di Yan, Jun Peng, Parvathala Reddy Narangari, Sudha Mokkapati, Hark Hoe Tan, Chennupati Jagadish, Ali Javey, Andrés Cuevas
  62. "Mid-Wave Infrared Photoconductors Based on Black Phosphorous-Arsenic Alloys"
    - ACS Nano, 2017 -
    Matin Amani, Emma Regan, James Bullock, Geun Ho Ahn, Ali Javey
  63. "Efficient Solar-Driven Electrochemical CO2 Reduction to Hydrocarbons and Oxygenates"
    - Energy & Environmental Science, 2017 -
    Gurudayal, James Bullock, David F. Srankó, Clarissa M. Towle, Yanwei Lum, Mark Hettick, Mary Scott, Ali Javey, Joel Ager
  64. "Superacid-Treated Silicon Surfaces: Extending the Limit of Carrier Lifetime for Photovoltaic Applications"
    - IEEE Journal of Photovoltaics, 2017 -
    Nicholas Grant, Tim Niewelt, Neil Wilson, Evangeline Wheeler-Jones, James Bullock, Mohammad Al-Amin, Martin Schubert, Andre van Veen, Ali Javey, John Murphy
  65. "Microchannel Contacting of Crystalline Silicon Solar Cells"
    - Scientific Reports, 2017 -
    James Bullock, Hiroki Ota, Hanchen Wang, Zhoaran Xu, Mark Hettick, Di Yan, Christian Samundsett, Yimao Wan, Stephanie Essig, Monica Morales-Masis, Andrés Cuevas, Ali Javey
  66. "A Low Resistance Calcium/Reduced Titania Passivated Contact for High Efficiency Crystalline Silicon Solar Cells"
    - Advanced Energy Materials, 2017 -
    Thomas G. Allen, James Bullock, Quinten Jeangros, Chris Samundsett, Yimao Wan, Jason Cui, Aicha Hessler‐Wyser, Stefaan De Wolf, Ali Javey, Andrés Cuevas
  67. "Conductive and Stable Magnesium Oxide Electron‐Selective Contacts for Efficient Silicon Solar Cells"
    - Advanced Energy Materials, 2017 -
    Yimao Wan, Chris Samundsett, James Bullock, Mark Hettick, Thomas Allen, Di Yan, Jun Peng, Yilang Wu, Jason Cui, Ali Javey, Andrés Cuevas
  68. "Efficient Silicon Solar Cells with Dopant-Free Asymmetric Heterocontacts"
    - Nature Energy, 2016 -
    James Bullock, Mark Hettick, Jonas Geissbühler, Alison J. Ong, Thomas Allen, Carolin M. Sutter-Fella, Teresa Chen, Hiroki Ota, Ethan W. Schaler, Stefaan De Wolf, Christophe Ballif, Andrés Cuevas, Ali Javey
  69. "Superacid Passivation of Crystalline Silicon Surfaces"
    - ACS Applied Materials & Interfaces, 2016 -
    James Bullock, D. Kiriya, N. E Grant, A. Azcatl, M. Hettick, T. Kho, P. Phang, H. C. Sio, D. Yan, D. MacDonald, M. A. Quevedo-Lopez, R. M. Wallace, A. Cuevas, A. Javey
  70. "Lithium Fluoride Based Electron Contacts for High Efficiency n-type Crystalline Silicon Solar Cells"
    - Advanced Energy Materials, 2016 -
    James Bullock, Peiting Zheng, Quentin Jeangros, Mahmut Tosun, Mark Hettick, Carolin M. Sutter-Fella, Yimao Wan, Thomas Allen, Di Yan, Daniel Macdonald, Stefaan De Wolf, Aïcha Hessler-Wyser, Andrés Cuevas, Ali Javey
  71. "Chemical Bath Deposition of p-Type Transparent, Highly Conducting (CuS)x:(ZnS)1–x Nanocomposite Thin Films and Fabrication of Si Heterojunction Solar Cells"
    - Nano letters, 2016 -
    Xiaojie Xu, James Bullock, Laura Schelhas, Elisa Stutz, Jose Fonseca Vega, Mark Hettick, Vanessa Pool, Michael Toney, Xiaosheng Fang, Joel W. Ager
  72. "Calcium Contacts to n-Type Crystalline Silicon Solar Cells"
    - Progress in Photovoltaics: Research and Applications, 2016 -
    Thomas G. Allen, James Bullock, P. Zheng, B. Vaughan, M. Barr, Y. Wan, C. Samundsett, A. Javey, A. Cuevas
  73. "Magnesium Fluoride as A Dopant–Free Electron–Selective Contact for Highly Efficient Crystalline Silicon Solar Cells"
    - ACS Applied Materials & Interfaces, 2016 -
    Yimao Wan, Chris Samundsett, James Bullock, Mark Hettick, Di Yan, Thomas Allen, Peiting Zheng, Xinyu Zhang, Jie Cui, Josephine McKeon, Ali Javey, and Andrés Cuevas
  74. "Low Resistance Hole Contacts on Crystalline Silicon via Nitrogen-Doped Copper Oxide Films"
    - Applied Physics Letters, 2016 -
    Xinyu Zhang, Yimao Wan, James Bullock, Thomas Allen, Andrés Cuevas
  75. "Wearable Microsensor Array for Multiplexed Heavy Metal Monitoring of Body Fluids"
    - ACS Sensors, 2016 -
    Wei Gao, Hnin Y. Y. Nyein, Ziba Shahpar, Hossian M. Fahad, Kevin Chen, Sam Emaminejad, Yuji Gao, Li-C. Tai, Hiroki Ota, Eric Wu, James Bullock, Yuping Zeng, Der-H. Lien, Ali Javey
  76. "Passivating Contacts for Silicon Solar Cells Based on Boron-Diffused Recrystallized Amorphous Silicon and Thin Dielectric Interlayers"
    - Solar Energy Materials and Solar Cells, 2016 -
    Di Yan, Andrés Cuevas, Yimao Wan, James Bullock
  77. "Advanced TEM Characterization of New Electrical Contacts for High Efficiency C-Si Solar Cells"
    - Microscopy and Microanalysis, 2016 -
    Quentin Jeangros, Jonas Geissbühler, James Bullock, Ali Javey, Stefaan De Wolf, Aicha Hessler-Wyser, Christophe Ballif
  78. "Simple Silicon Solar Cells Featuring an A-Si:H Enhanced Rear MIS Contact"
    - Solar Energy Materials and Solar Cells, 2015 -
    James Bullock, Andrés Cuevas, Christian Samundsett, Di Yan, Josephine McKeon, Yimao Wan
  79. "Proof-of-Concept p-Type Silicon Solar Cells with Molybdenum Oxide Partial Rear Contacts"
    - IEEE Journal of Photovoltaics, 2015 -
    James Bullock, Christian Samundsett, Andrés Cuevas, Di Yan, Yimao Wan, Thomas Allen
  80. "n- and p-Type Silicon Solar Cells with Molybdenum Oxide Hole Contacts"
    - Energy Procedia, 2015 -
    James Bullock, Di Yan, Andrés Cuevas, Yimao Wan, Christian Samundsett
  81. "Passivated Contacts to Laser Doped p+ And n+ Regions"
    - Solar Energy Materials and Solar Cells, 2015 -
    Xinbo Yang, James Bullock, Lujia Xu, Qunyu Bi, Sachin Surve, Marco Ernst, Klaus Weber
  82. "High Efficiency n-Type Silicon Solar Cells Featuring Passivated Contact To Laser Doped Regions"
    - Applied Physics Letters, 2015 -
    Xinbo Yang, James Bullock, Qunyu Bi, Klaus Weber
  83. "Tantalum Oxide/Silicon Nitride: A Negatively Charged Surface Passivation Stack for Silicon Solar Cells"
    - Applied Physics Letters, 2015 -
    Yimao Wan, James Bullock, Andrés Cuevas
  84. "Passivation of C-Si Surfaces by ALD Tantalum Oxide Capped with PECVD Silicon Nitride"
    - Solar Energy Materials and Solar Cells, 2015 -
    Yimao Wan, James Bullock, Andrés Cuevas
  85. "Phosphorus-Diffused Polysilicon Contacts for Solar Cells"
    - Solar Energy Materials and Solar Cells, 2015 -
    Di Yan, Andrés Cuevas, James Bullock, Yimao Wan, Christian Samundsett
  86. "Contact Resistivity of Evaporated Al Contacts for Silicon Solar Cells"
    - IEEE Journal of Photovoltaics, 2015 -
    Kean Chern Fong, Teng Choon Kho, Andreas Fell, Evan Franklin, Ngwe Zin, Andrew W. Blakers, Keith R. McIntosh, Thomas Ratcliff, Matthew Stocks, James Bullock, Er-Chien Wang
  87. "Passivation of C-Si Surfaces by sub-nm Amorphous Silicon Capped with Silicon Nitride"
    - Applied Physics Letters, 2015 -
    Yimao Wan, Di Yan, James Bullock, Xinyu Zhang, Andrés Cuevas
  88. "Silicon Nitride/Silicon Oxide Interlayers for Solar Cell Passivating Contacts Based on PECVD Amorphous Silicon"
    - physica status solidi: rrl, 2015 -
    Di Yan, Andrés Cuevas, Yimao Wan, James Bullock
  89. "Molybdenum Oxide MoOx: A Versatile Hole Contact for Silicon Solar Cells"
    - Applied Physics Letters, 2014 -
    James Bullock, Andrés Cuevas, Thomas G. Allen, Corsin Battaglia
  90. "Amorphous Silicon Passivated Contacts for Diffused Junction Silicon Solar Cells"
    - Journal of Applied Physics, 2014 -
    James Bullock, Di Yan, Yimao Wan, Andrés Cuevas, Benedicte Demaurex, Aïcha Hessler-Wyser, Stefaan De Wolf
  91. "Nanoporous Silicon Produced by Metal-Assisted Etching: A Detailed Investigation of Optical and Contact Properties for Solar Cells"
    - IEEE Journal of Photovoltaics, 2014 -
    Teck Kong Chong, James Bullock, Thomas P White, Martin Berry, Klaus J Weber
  92. "Amorphous Silicon Enhanced Metal-Insulator-Semiconductor Contacts for Silicon Solar Cells"
    - Journal of Applied Physics, 2014 -
    James Bullock, Di Yan, Andrés Cuevas, Benedicte Demaurex, Aïcha Hessler-Wyser, Stefaan De Wolf
  93. "Degradation of The Surface Passivation of Plasma‐Assisted ALD Al2O3 Under Damp‐Heat Exposure"
    - physica status solidi (a), 2014 -
    Wensheng Liang, Dongchul Suh, Jun Yu, James Bullock, Klaus J Weber
  94. "Grown-in Defects Limiting The Bulk Lifetime of p-Type Float-Zone Silicon Wafers"
    - Journal of Applied Physics, 2014 -
    Nicholas Grant, Fiacre Rougieux, Daniel Macdonald, James Bullock, Yimao Wan
  95. "Damp and Dry Heat Degradation of Thermal Oxide Passivation of p+ Silicon” "
    - Journal of Applied Physics, 2014 -
    Andrew Thomson, Matthew Gardener, Keith McIntosh, Avi Shalav, James Bullock
  96. "Passivation of Aluminium–n+Silicon Contacts for Solar Cells by Ultrathin Al2O3 and SiO2 Dielectric Layers"
    - physica status solidi: rrl, 2013 -
    James Bullock, Di Yan, Andrés Cuevas
  97. "Enhanced Rear-Side Reflection and Firing-Stable Surface Passivation of Silicon Solar Cells with Capping Polymer Films"
    - physica status solidi: rrl, 2013 -
    James Bullock, Boris Veith, Andrew Thomson, Ari Karkkainen, Jan Schmidt, Andrés Cuevas
  98. "The Mechanical Photochemical Properties of Titania Coated Silica"
    - ECS Journal of Solid State Science and Technology, 2013 -
    Avi Shalav, James Bullock, Peter Anderson, Simon Ruffell, John White, Robert G. Elliman


Conference Publications

    2023

  1. "C60 as a Versatile Electron Contact Material for Crystalline Silicon Solar Cells"
    - Asia Pacific Solar Research Conference, RMIT Melbourne -
    Yuchen Sun, Jesús Ibarra Michel, Daniela Bozanic, Pheng Phang, Heping Shen, Jie Yang, Peiting Zheng, Xinyu Zhang, Di Yan, James Bullock
  2. "Metal Oxide Sol-Gel Films for Protection of Ultrathin Polysilicon Contacts"
    - Asia Pacific Solar Research Conference, RMIT Melbourne -
    Yumin Li, Pheng Phang Di Yan, Heping Shen, Jie Yang, Enrico Della Gaspera, Peiting Zhang, Xinyu Zhang, Jesús Ibarra Michel, James Bullock
  3. "Improving the Stability of Polycrystalline Silicon Passivated Contacts Using Titanium Dioxide"
    - IEEE 50th Photovoltaic Specialists Conference (PVSC) -
    Di Yan, Jesús Ibarra Michel, Yida Pan, Sieu Pheng Phang, Daniel Macdonald, Heping Shen, Leiping Duan, Kylie Catchpole, Jie Yang, Peiting Zheng, Xinyu Zhang, Hao Jin, James Bullock

    4. 2021

  4. "Longwave Infrared Photoresponse in Copper 7,7,8,8-tetracyano-2,3,5,6-tetraflouroquinodimethane (CuTCNQF4)"
    - Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), 2021 -
    Sivacarendran Balendhran, Aviraj Ingle, Wei Yan, Nima Sefidmooye Azar, Hyungjin Kim, Rajesh Ramanathan, James Bullock, Ali Javey, Vipul Bansal, Kenneth B. Crozier
  5. "Aluminium Electrode Induced Surface Passivation Deterioration for Dopant Free Passivated Contacts"
    - IEEE 48th Photovoltaic Specialists Conference (PVSC) -
    Wensheng Liang, Parvathala Narangari, Jingnan Tong, James Bullock, Jesús Ibarra Michel, Hang Cheong Sio, Teng Kho, Stephane Armand, Keith McIntosh, Kean Chern Fong
  6. "Polarization-Converting Plasmonic Nanoantennas for Light Absorption Enhancement in Anisotropic 2d Black Phosphorus"
    - Lasers and Electro-Optics/Pacific Rim -
    Nima Sefidmooye Azar, James Bullock, Sivacarendran Balendhran, Hyungjin Kim, Ali Javey, Kenneth B. Crozier

    7. 2020

  7. "Visible to Long-Wave Infrared Photodetectors based on Copper Tetracyanoquinodimethane (CuTCNQ) Crystals"
    - Lasers and Electro-Optics/Pacific Rim -
    Sivacarendran Balendhran, Zakir Hussain, Vivek R Shrestha, Jasper Cadusch, Ming Ye, Hyungjin Kim, Rajesh Ramanathan, James Bullock, Ali Javey, Vipul Bansal, Kenneth B. Crozier
  8. "Long-Wave Infrared Photodetectors Based on Platinum Diselenide"
    - Lasers and Electro-Optics Pacific Rim (CLEO-PR) -
    Nima Sefidmooye Azar, Vivek Raj Shrestha, James Bullock, Matin Amani, Hyungjin Kim, Ali Javey, Kenneth B. Crozier

    9. 2019

  9. "In Situ Transmission Electron Microscopy: A Powerful Tool for the Characterization of Carrier-Selective Contacts"
    - IEEE 46th Photovoltaic Specialists Conference (PVSC), 2019 -
    Haider Ali, Supriya Koul, Geoffrey Gregory, James Bullock, Ali Javey, Akihiro Kushima, Kristopher O Davis
  10. "Mid-Infrared Computational Spectroscopy with an Electrically-Tunable Graphene Metasurface"
    - CLEO: Science and Innovations, 2019 -
    Vivek Raj Shrestha, Benjamin Craig, Matin Amani, James Bullock, Ali Javey, Kenneth B. Crozier

    11. Pre-2019

  11. "Electrical Tuning of Reflectance Of Graphene Metasurface for Unpolarized Long Wavelength Infrared Light"
    - Integrated Photonics Research, Silicon and Nanophotonics, 2018 -
    Vivek Raj Shrestha, Yang Gao, Matin Amani, James Bullock, Ali Javey, Kenneth B. Crozier
  12. "23% Efficient n-Type Crystalline Silicon Solar Cells with Passivated Partial Rear Contacts"
    - 45th IEEE Photovoltaic Specialist Conference (PVSC), 2018 -
    James Bullock, Yimao Wan, Xu Zhaoran, Di Yan, Pheng Phang, Mark Hettick, Chris Samundsett, Ziv Hameiri, Andrés Cuevas, Ali Javey
  13. "Efficient Electron Contacts for n-Type Silicon Solar Cells Using Magnesium Metal, Oxide, and Fluoride"
    - 44th IEEE Photovoltaic Specialist Conference (PVSC), 2017 -
    Yimao Wan, Chris Samundsett, James Bullock, Di Yan, Thomas Allen, Jun Peng, Jie Cui, Mark Hettick, Ali Javey, Andrés Cuevas
  14. "Metal Nanoparticle Hole Contacts for Silicon Solar Cells"
    - 44th IEEE Photovoltaic Specialist Conference (PVSC), 2017 -
    James Bullock, Zhaoran Xu, Mark Hettick, Yimao Wan, Ali Javey
  15. "Survey of Dopant-Free Carrier-Selective Contacts for Silicon Solar Cells"
    - 43rd IEEE Photovoltaic Specialist Conference (PVSC), 2016 -
    James Bullock, Yimao Wan, Mark Hettick, Jonas Geissbühler, Alison J Ong, Daisuke Kiriya, Di Yan, Thomas Allen, Jun Peng, Xinyu Zhang, Carolin M Sutter-Fella, Stefaan De Wolf, Christophe Ballif, Andrés Cuevas, Ali Javey
  16. "Characterisation of Sputtering Deposited Amorphous Silicon Films for Silicon Heterojunction Solar Cells"
    - 43rd IEEE Photovoltaic Specialist Conference (PVSC), 2016 -
    Xinyu Zhang, Andrés Cuevas, James Bullock
  17. "Magnesium Fluoride Based Electron-Selective Contact"
    - 43rd IEEE Photovoltaic Specialist Conference (PVSC), 2016 -
    Yimao Wan, Chris Samundsett, James Bullock, Di Yan, Thomas Allen, Peiting Zheng, Xinyu Zhang, Jie Cui, Josephine McKeon, Andrés Cuevas
  18. "Low Resistance TiO2-Passivated Calcium Contacts for Crystalline Silicon Solar Cells"
    - 43rd IEEE Photovoltaic Specialist Conference (PVSC), 2016 -
    Thomas G. Allen, Peiting Zheng, Ben Vaughan, Matthew Barr, Yimao Wan, Christian Samundsett, James Bullock, Andrés Cuevas
  19. "Proof-of-Concept p-Type Silicon Solar Cells with Molybdenum Oxide Partial Rear Contacts"
    - 42nd IEEE Photovoltaic Specialist Conference (PVSC), 2015 -
  20. "Skin Care for Healthy Silicon Solar Cells"
    - 42nd IEEE Photovoltaic Specialist Conference (PVSC), 2015 -
    Andrés Cuevas, Thomas Allen, James Bullock, Yimao Wan, Xinyu Zhang
  21. "Development of a Self-Aligned Etch-Back Process for Selectively Doped Silicon Solar Cells"
    - 40th IEEE Photovoltaic Specialist Conference (PVSC), 2014 -
    Di Yan, James Bullock, Yimao Wan, Andrés Cuevas
  22. "Reactive Ion Etched Black Silicon Texturing: A Comparative Study"
    - 40th IEEE Photovoltaic Specialist Conference (PVSC), 2014 -
    Thomas Allen, James Bullock, Andrés Cuevas, Simeon Baker-Finch, Fouad Karouta
  23. "Passivated Contacts to n+ and p+ Silicon Based on Amorphous Silicon and Thin Dielectrics"
    - 40th IEEE Photovoltaic Specialist Conference (PVSC), 2014 -
    James Bullock, Di Yan, Andrés Cuevas, Benedicte Demaurex, Aïcha Hessler-Wyser and Stefaan De Wolf
  24. "Humidity Degradation and Repair of ALD Al2O3 Passivated Silicon"
    - 39th IEEE Photovoltaic Specialist Conference (PVSC), 2013 -
    Wensheng Liang, Klaus Weber, Dongchul Suh, Jun Yu, James Bullock
  25. "Light Enhanced Hydrofluoric Acid Passivation for Evaluating Silicon Bulk Lifetimes"
    - 28th European Photovoltaic Solar Energy Conference and Exhibition, 2013 -
    Nicholas E. Grant, Keith R. McIntosh, Jason Tan, Fiacre Rougieux, James Bullock, Yimao Wan, Chog Barugkin
  26. "Enhanced Back-Surface Reflectance and Passivation Capping from the Application of Inexpensive Sray/Spin on Polymer Coatings on Thin ALD Al2O3 Layers"
    - 27th European Photovoltaic Solar Energy Conference and Exhibition, 2012 -
    Andrew Thomson, James Bullock, Teng Kho, Paul Williams, Ari Karkkainen, Leon Kwek, Andrés Cuevas
  27. "Imaging the Recombination Current Pre-Factor Jo of Heavily Doped Surface Regions; A Comparison of Low and High Injection Photoluminescence Techniques"
    - 27th European Photovoltaic Solar Energy Conference and Exhibition, 2012 -
    James Bullock, Di Yan, Andrew Thomson, Andrés Cuevas