Author:
Zheng Jiajia,Fu Liuchong,He Yuming,Li Kanghua,Lu Yue,Xue Jiayou,Liu Yuxuan,Dong Chong,Chen Chao,Tang Jiang
Abstract
AbstractSelenium (Se) element is a promising light-harvesting material for solar cells because of the large absorption coefficient and prominent photoconductivity. However, the efficiency of Se solar cells has been stagnated for a long time owing to the suboptimal bandgap (> 1.8 eV) and the lack of a proper electron transport layer. In this work, we tune the bandgap of the absorber to the optimal value of Shockley–Queisser limit (1.36 eV) by alloying 30% Te with 70% Se. Simultaneously, ZnO electron transport layer is selected because of the proper band alignment, and the mild reaction at ZnO/Se0.7Te0.3 interface guarantees a good-quality heterojunction. Finally, a superior efficiency of 1.85% is achieved on ZnO/Se0.7Te0.3 solar cells.
Graphical abstract
Publisher
Springer Science and Business Media LLC
Subject
Electrical and Electronic Engineering,Electronic, Optical and Magnetic Materials
Reference56 articles.
1. Fritts, C.E.: On a new form of selenium cell, and some electrical discoveries made by its use. Am. J. Sci. 26(156), 465–472 (1883)
2. Bhatnagar, A.K., Reddy, K.V., Srivastava, V.: Optical energy gap of amorphous selenium: effect of annealing. J. Appl. Phys. 18(9), 149 (1985)
3. Tutihasi, S., Chen, I.: Optical properties and band structure of trigonal selenium. Phys. Rev. 158(3), 623–630 (1967)
4. Dowd, J.J.: Optical properties of selenium. Proc. Phys. Soc. B 64(9), 783–789 (1951)
5. Hegedus, S.S., Shafarman, W.N.: Thin-film solar cells: device measurements and analysis. Prog. Photovolt. Res. Appl. 12(23), 155–176 (2004)
Cited by
4 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献