1. Bi2Te3 thin films prepared by co-evaporation for CdTe thin film solar cells.
- Author
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Tang, Rongzhe, Wang, Zhouling, Li, Wei, Feng, Lianghuan, Zhang, Jingquan, Wu, Lili, Li, Bing, Zeng, Guanggen, and Wang, Wenwu
- Subjects
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BISMUTH telluride films , *METALLIC thin films , *CHEMICAL preparations industry , *EVAPORATION (Chemistry) , *CADMIUM telluride films , *SOLAR cells - Abstract
Abstract: Bi2Te3 thin films were fabricated by vacuum co-evaporation and the properties of the films were investigated using X-ray diffraction, Hall measurements, and synchrotron radiation photoemission spectroscopy. The results indicate that p-type Bi2Te3 films, which have a work function of about 5.4eV and carrier concentration of the order of 1021 cm−3, are a rhombohedral phase with a strong (105) preferred orientation. A co-evaporated Bi2Te3 buffer layer was used for a back contact to CdTe thin film solar cells. C–V measurements, light and dark J–V measurements, and spectral response analysis also show that the p back contact has greatly enhanced cell performance. [Copyright &y& Elsevier]
- Published
- 2014
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