Influences of buffer material and fabrication atmosphere on the electrical properties of CdTe solar cells

Rasha A. Awni, Deng Bing Li, Zhaoning Song, Sandip S. Bista, Mohammed A. Razooqi, Corey R. Grice, Lei Chen, Geethika K. Liyanage, Chongwen Li, Adam B. Phillips, Michael J. Heben, Randy J. Ellingson, Jian V. Li, Yanfa Yan

研究成果: Article同行評審

13 引文 斯高帕斯(Scopus)

摘要

The electrical properties such as interface energy barriers, defect energy levels, and densities dictate the performance of thin film solar cells. Here, we show that these properties can be quantified in cadmium telluride (CdTe) thin-film solar cells using admittance spectroscopy-based techniques. Our results reveal that the electrical properties in CdTe thin-film solar cells depend on both buffer material and the fabrication atmosphere. We find that only a negligible front contact barrier exists at the CdS/CdTe front junction regardless of the fabrication atmospheres, while an obvious front barriers are observed at the ZnMgO (ZMO)/CdTe junctions. Both CdS/CdTe and ZMO/CdTe solar cells exhibit back contact barrier. The energy level of defects is shallower in CdS/CdTe cells than in ZMO/CdTe cells. The fabrication atmosphere influences the electrical properties, i.e., an oxygen-free atmosphere reduces the front and back barrier heights and lowers the energy level of defects. The results provide critical insights for understanding and optimizing the performance of CdTe thin-film solar cells.

原文English
頁(從 - 到)1115-1123
頁數9
期刊Progress in Photovoltaics: Research and Applications
27
發行號12
DOIs
出版狀態Published - 2019 十二月 1

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 可再生能源、永續發展與環境
  • 凝聚態物理學
  • 電氣與電子工程

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