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- Title
Optical and photovoltaic properties of vacuum-evaporated CZTSe, CAZTSe, and AZTSe thin films: a comparative study.
- Authors
Henry, J.; Sivakumar, G.; Vettumperumal, R.; Subramanian, T. Senthil Siva; Mohanraj, K.
- Abstract
In this work, we analyzed the structural, morphological, optical, and electrical properties of vacuum-evaporated Cu2ZnSnS4 (CZTSe), CuAgZnSnS4 (CAZTSe), and Ag2ZnSnS4 (AZTSe) thin films. The structural analysis confirms the presence of tetragonal-structured CZTSe and showed peak shift toward the lower angle for CAZTSe and AZTSe films. Raman spectra indicate the presence of SnSe (at 140 cm−1), ZnSe (at 255 cm−1), and CuSe (at 280 cm−1) as secondary phases. The EDS analysis is evidenced for the presence of Cu, Ag, Zn, Sn, and Se signals with Zn- and Sn-rich condition. SEM images picturized the spherical-shaped particles rich with irregular-shaped particles. Among the films, CAZTSe showed good optical absorption behavior in the visible region. CZTSe shows p-type conductivity, while the CAZTSe and AZTSe films show n-type conductivity as identified by Hall Effect analysis. The CAZTSe film exhibited higher mobility which is good for photovoltaic applications. FTO/CZTSe/AZTSe/Ag and FTO/CZTSe/CAZTSe/Ag solar cells were fabricated and its Photoconversion Efficiency (PCE) is studied.
- Subjects
OPTICAL properties; LIGHT absorption; THIN films; HALL effect; SOLAR cells; RAMAN spectroscopy
- Publication
Journal of Materials Science: Materials in Electronics, 2021, Vol 32, Issue 15, p20259
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-021-06529-7