Volume 239, 2022

Rapid thermal annealing process for Se thin-film solar cells

Abstract

Recently, selenium (Se) has regained interest as a possible wide-bandgap photovoltaic material for silicon-based tandem applications. However, the easy sublimation of Se below the melting point (220 °C) brings challenges for high-quality Se thin films. Herein, we design a rapid thermal annealing (RTA) method to balance the contradiction between the sublimation and crystallization of Se thin films. Through optimizing the annealing temperature, a high-quality Se thin film is obtained with a large grain size (∼1 μm) and preferred [003] orientation during the RTA process. Then, an optimized efficiency of 3.22% is achieved in a ZnO/Se heterojunction solar cell. This study provides a new guide to obtain high-quality Se thin film by RTA and the method can be extended to other materials with high saturated vapor pressure.

Graphical abstract: Rapid thermal annealing process for Se thin-film solar cells

Associated articles

Supplementary files

Article information

Article type
Paper
Submitted
31 mar 2022
Accepted
26 apr 2022
First published
27 apr 2022

Faraday Discuss., 2022,239, 317-327

Rapid thermal annealing process for Se thin-film solar cells

L. Fu, J. Zheng, X. Yang, Y. He, C. Chen, K. Li and J. Tang, Faraday Discuss., 2022, 239, 317 DOI: 10.1039/D2FD00070A

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