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- Title
Carrier Transport Enhancement Mechanism in Highly Efficient Antimony Selenide Thin‐Film Solar Cell.
- Authors
Luo, Yandi; Chen, Guojie; Chen, Shuo; Ahmad, Nafees; Azam, Muhammad; Zheng, Zhuanghao; Su, Zhenghua; Cathelinaud, Michel; Ma, Hongli; Chen, Zhigang; Fan, Ping; Zhang, Xianghua; Liang, Guangxing
- Abstract
Exhibiting outstanding optoelectronic properties, antimony selenide (Sb2Se3) has attracted considerable interest and has been developed as a light absorber layer for thin‐film solar cells over the decade. However, current state‐of‐the‐art Sb2Se3 devices suffer from unsatisfactory "cliff‐like" band alignment and severe interface recombination loss, which deteriorates device performance. In this study, the heterojunction interface of an Sb2Se3 solar cell is improved by introducing effective aluminum (Al3+) cation into the CdS buffer layer. Then, the energy band alignment of Sb2Se3/CdS:Al heterojunction is modified from a "cliff‐like" structure to a "spike‐like" structure. Finally, heterojunction interface engineering suppresses recombination losses and strengthens carrier transport, resulting in a high efficiency of 8.41% for the substrate‐structured Sb2Se3 solar cell. This study proposes a facile strategy for interfacial treatment and elucidates the related carrier transport enhancement mechanism, paving a bright avenue to overcome the efficiency bottleneck of Sb2Se3 thin‐film solar cells.
- Subjects
SOLAR cells; PHOTOVOLTAIC power systems; ANTIMONY; BUFFER layers; TRANSPORT planes; ENERGY bands; HETEROJUNCTIONS
- Publication
Advanced Functional Materials, 2023, Vol 33, Issue 14, p1
- ISSN
1616-301X
- Publication type
Article
- DOI
10.1002/adfm.202213941