Quasi-Vertically Oriented Sb2Se3 Thin-Film Solar Cells with Open-Circuit Voltage Exceeding 500 mV Prepared via Close-Space Sublimation and Selenization

Article

Fan, Ping, Chen, Guo-Jie, Chen, Shuo, Zheng, Zhuang-Hao, Azam, Muhammad, Ahmad, Nafees, Su, Zheng-Hua, Liang, Guang-Xing, Zhang, Xiang-Hua and Chen, Zhi-Gang. 2021. "Quasi-Vertically Oriented Sb2Se3 Thin-Film Solar Cells with Open-Circuit Voltage Exceeding 500 mV Prepared via Close-Space Sublimation and Selenization." ACS Applied Materials and Interfaces. 13 (39), pp. 46671-46680. https://doi.org/10.1021/acsami.1c13223
Article Title

Quasi-Vertically Oriented Sb2Se3 Thin-Film Solar Cells with Open-Circuit Voltage Exceeding 500 mV Prepared via Close-Space Sublimation and Selenization

ERA Journal ID40638
Article CategoryArticle
AuthorsFan, Ping, Chen, Guo-Jie, Chen, Shuo, Zheng, Zhuang-Hao, Azam, Muhammad, Ahmad, Nafees, Su, Zheng-Hua, Liang, Guang-Xing, Zhang, Xiang-Hua and Chen, Zhi-Gang
Journal TitleACS Applied Materials and Interfaces
Journal Citation13 (39), pp. 46671-46680
Number of Pages10
Year2021
PublisherAmerican Chemical Society
Place of PublicationUnited States
ISSN1944-8244
1944-8252
Digital Object Identifier (DOI)https://doi.org/10.1021/acsami.1c13223
Web Address (URL)https://pubs.acs.org/doi/10.1021/acsami.1c13223
Abstract

Sb2Se3, one of the most desirable absorption materials for next-generation thin-film solar cells, has an excellent photovoltaic characteristic. The [hk1]-oriented (quasi-vertically oriented) Sb2Se3thin film is more beneficial for promoting efficient carrier transport than the [hk0]-oriented Sb2Se3thin film. Controlling thin-film orientation remains the main obstacle to the further improvement in the efficiency of Sb2Se3-based solar cells. In this work, the controlled [hk0] or [hk1] orientation of the Sb2Se3precursor is readily adjusted by tuning the substrate temperature and the distance between the source and the sample in close-space sublimation (CSS). Well-crystallized stoichiometric Sb2Se3thin films with the desired orientation and large crystal grains are successfully prepared after selenization. Sb2Se3thin-film solar cells in a substrate configuration of glass/Mo/Sb2Se3/CdS/ITO/Ag are fabricated with a power conversion efficiency of 4.86% with a record open-circuit voltage (VOC) of 509 mV. The significant improvement inVOCis closely related to the quasi-vertically oriented Sb2Se3absorber layer with reduced deep-level defect density in the bulk and defect passivation at the Sb2Se3/CdS heterojunction. This work indicates that CSS and selenization show a remarkable potential for the fabrication of high-efficiency Sb2Se3solar cells.

KeywordsSb2Se3; solar cell; orientation; open-circuit voltage; close-space sublimation
Contains Sensitive ContentDoes not contain sensitive content
ANZSRC Field of Research 2020400402. Chemical and thermal processes in energy and combustion
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Byline AffiliationsShenzhen University, China
University of Rennes, France
Centre for Future Materials
University of Queensland
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