James Bullock

Spectrally Selective Mid-Wave Infrared Detection Using Fabry-Pérot Cavity Enhanced Black Phosphorus 2D Photodiodes.

Wei Yan, Vivek Raj Shresha, Quentin Jeangros, Nima Sefidmooye Azar, Sivacarendran Balendhran, Christophe Ballif, Kenneth Crozier, James Bullock

Journal article  |  2020  |  ACS Nano

Thin two-dimensional (2D) material absorbers have the potential to reduce volume-dependent thermal noise in infrared detectors. Ho..

Long-Wave Infrared Photodetectors Based on Platinum Diselenide

NS Azar, VR Shrestha, J Bullock, M Amani, H Kim, A Javey, KB Crozier

Conference Proceedings  |  2020  |  14th Pacific Rim Conference on Lasers and Electro-Optics (CLEO PR 2020)

Visible to Long-Wave Infrared Photodetectors based on Copper Tetracyanoquinodimethane (CuTCNQ) Crystals

S Balendhran, Z Hussain, VR Shrestha, J Cadusch, M Ye, H Kim, R Ramanathan, J Bullock, A Javey, V Bansal, KB Crozier

Conference Proceedings  |  2020  |  14th Pacific Rim Conference on Lasers and Electro-Optics (CLEO PR 2020)

Mid- to long-wave infrared computational spectroscopy with a graphene metasurface modulator.

Vivek Raj Shrestha, Benjamin Craig, Jiajun Meng, James Bullock, Ali Javey, Kenneth B Crozier

Journal article  |  2020  |  Scientific Reports

In recent years there has been much interest concerning the development of modulators in the mid- to long-wave infrared, based on ..

21.3%-efficient n-type silicon solar cell with a full area rear TiOx/LiF/Al electron-selective contact

W Wang, J He, D Yan, C Samundsett, SP Phang, Z Huang, W Shen, J Bullock, Y Wan

Journal article  |  2020  |  Solar Energy Materials and Solar Cells

In this work, we investigate an efficient electron-selective passivating contact with TiOx/LiF/Al contact structure, which offers ..

Passivating contacts for crystalline silicon solar cells

TG Allen, J Bullock, X Yang, A Javey, S De Wolf

Journal article  |  2019  |  Nature Energy

The global photovoltaic (PV) market is dominated by crystalline silicon (c-Si) based technologies with heavily doped, directly met..

Machine Learning Optimization of p-Type Transparent Conducting Films

Lingfei Wei, Xiaojie Xu, undefined Gurudayal, James Bullock, Joel W Ager

Journal article  |  2019  |  Chemistry of Materials

p-Type transparent conducting materials (p-TCMs) are important components of optoelectronic devices including solar cells, photode..

Optical and electrical properties of two-dimensional palladium diselenide

G Zhang, M Amani, A Chaturvedi, C Tan, J Bullock, X Song, H Kim, DH Lien, MC Scott, H Zhang, A Javey

Journal article  |  2019  |  Applied Physics Letters

© 2019 Author(s). Two-dimensional (2D) noble-metal dichalcogenides exhibit exceptionally strong thickness-dependent bandgaps, whic..

In Situ Transmission Electron Microscopy: A Powerful Tool for the Characterization of Carrier-Selective Contacts

H Ali, S Koul, G Gregory, J Bullock, A Javey, A Kushima, KO Davis

Conference Proceedings  |  2019  |  2019 IEEE 46th Photovoltaic Specialists Conference (PVSC)

15% Efficiency Ultrathin Silicon Solar Cells with Fluorine-Doped Titanium Oxide and Chemically Tailored Poly(3,4-ethylenedioxythiophene):Poly(styrenesulfo nate) as Asymmetric Heterocontact

Jian He, Md Anower Hossain, Hao Lin, Wenjie Wang, Siva Krishna Karuturi, Bram Hoex, Jichun Ye, Pingqi Gao, James Bullock, Yimao Wan

Journal article  |  2019  |  ACS Nano