Fabrication and characterization of ZnO/Se(1-x)Te(x) solar cells

Selenium (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 pro...

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Detalles Bibliográficos
Autores principales: Zheng, Jiajia, Fu, Liuchong, He, Yuming, Li, Kanghua, Lu, Yue, Xue, Jiayou, Liu, Yuxuan, Dong, Chong, Chen, Chao, Tang, Jiang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Higher Education Press 2022
Materias:
Research Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9756246/
https://www.ncbi.nlm.nih.gov/pubmed/36637622
http://dx.doi.org/10.1007/s12200-022-00040-5
Descripción
Sumario:Selenium (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/Se(0.7)Te(0.3) interface guarantees a good-quality heterojunction. Finally, a superior efficiency of 1.85% is achieved on ZnO/Se(0.7)Te(0.3) solar cells. GRAPHICAL ABSTRACT: [Image: see text] SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s12200-022-00040-5.

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