Sabin Neupane, Deng-Bing Li, Abasi Abudulimu, Manoj Kumar Jamarkattel, Chun-Sheng Jiang, Yeming Xian, Xiaomeng Duan, Adam B. Phillips, Michael J. Heben, Randall J. Ellingson, Feng Yan, Dingyuan Lu, Dan Mao, Nicholas Miller, James Becker, William Huber, Gang Xiong, Yanfa Yan
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引用次数: 0
Abstract
The focus of CdSeTe thin-film solar cell doping has transitioned from copper (Cu) doping to group V doping. In situ group V doping has resulted in a new record power conversion efficiency (PCE) of 23.1%, with open-circuit voltages (VOCs) exceeding the 900 mV mark. Here, we report that ex situ bismuth (Bi)-doped CdSeTe thin-film solar cells show VOCs exceeding 900 mV and a champion PCE of 20.6%. Characterizations revealed that the Se-rich CdSeTe region near the front junction promotes Bi ions to occupy the anion sites and dope this region weakly p-type. Bi ions in the CdTe-dominating back surface region occupy the cation sites and are oxidized. This ex situ Bi doping with BiF3 as a dopant precursor offers several advantages, including simplicity, high tolerance to the processing environment, and no requirement of additional Cd vapor or special activation processes, making it highly adaptable for researchers to explore efficient Bi-doped CdSeTe thin-film solar cells.
期刊介绍:
Joule is a sister journal to Cell that focuses on research, analysis, and ideas related to sustainable energy. It aims to address the global challenge of the need for more sustainable energy solutions. Joule is a forward-looking journal that bridges disciplines and scales of energy research. It connects researchers and analysts working on scientific, technical, economic, policy, and social challenges related to sustainable energy. The journal covers a wide range of energy research, from fundamental laboratory studies on energy conversion and storage to global-level analysis. Joule aims to highlight and amplify the implications, challenges, and opportunities of novel energy research for different groups in the field.