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- Title
Comparative Study of TiO<sub>2</sub> and CdS as the Electron Transport Layer for Sb<sub>2</sub>S<sub>3</sub> Solar Cells.
- Authors
Zeng, Yiyu; Huang, Jialiang; Li, Jianjun; Sun, Kaiwen; Shah, Usman Ali; Deng, Hui; Zhang, Xueyun; Sha, Chuhan; Qian, Chen; Song, Haisheng; Hao, Xiaojing
- Abstract
Antimony sulfide (Sb2S3) is a promising wide‐bandgap photovoltaic material, and a potential top‐cell candidate for next‐generation Si‐based tandem solar cells. The most widely used electron transport layers in Sb2S3 solar cells are TiO2 and CdS, which present an obvious performance variation in open‐circuit voltage (VOC) and short current (Jsc). However, the mechanisms behind the performance disparity because of the electron transport layer (ETL) have not been disclosed. Herein, a comprehensive comparative study of using TiO2 and CdS as the electron transport layers in Sb2S3 solar cells is presented, which covers their influence on preferential crystal orientation, band alignment, interface, and bulk defects. It is found that the CdS ETL results in less interfacial defects and more favorable band alignment, enabling a higher VOC, while the high resistance of the CdS film and parasitic light absorption restricts the JSC. The findings provide a substantial guidance on device optimization for Sb2S3 solar cells.
- Subjects
SOLAR cells; ELECTRON transport; OPEN-circuit voltage; CRYSTAL orientation; COMPARATIVE studies; PHOTOVOLTAIC power systems
- Publication
Solar RRL, 2022, Vol 6, Issue 10, p1
- ISSN
2367-198X
- Publication type
Article
- DOI
10.1002/solr.202200435