Optical properties of amorphous and polycrystalline Sb2Se3 thin films prepared by thermal evaporation

Sb2Se3 is a very promising photovoltaic material because of its attractive material, optical and electrical properties. Very recently, we reported a superstrate CdS/Sb2Se3 solar cell with 5.6% certified efficiency. In this letter, we focused on the optical properties of amorphous and polycrystalline...

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Bibliographic Details
Published in:Applied physics letters 2015-07, Vol.107 (4)
Main Authors: Chen, Chao, Li, Weiqi, Zhou, Ying, Chen, Cheng, Luo, Miao, Liu, Xinsheng, Zeng, Kai, Yang, Bo, Zhang, Chuanwei, Han, Junbo, Tang, Jiang
Format: Article
Language:English
Subjects:
Antimony compounds
Applied physics
Electrical properties
Ellipsometry
Evaporation
Optical properties
Optical transition
Photoluminescence
Photovoltaic cells
Polycrystals
Refractivity
Selenides
Solar cells
Temperature dependence
Thin films
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Summary:Sb2Se3 is a very promising photovoltaic material because of its attractive material, optical and electrical properties. Very recently, we reported a superstrate CdS/Sb2Se3 solar cell with 5.6% certified efficiency. In this letter, we focused on the optical properties of amorphous and polycrystalline Sb2Se3 thin films prepared by thermal evaporation. Using temperature dependent transmission spectrum and temperature dependent photoluminescence, the indirect optical transition nature and bandgap values as functions of temperature were acquired. Using ellipsometry measurements and Swanepoel's envelope method, the refractive indices as well as the dielectric constant in a wide wavelength range of 193–2615 nm were obtained. These works would lay the foundation for the further development of Sb2Se3 thin film solar cells.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4927741