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Annealing effects on phase transformation and optical enhancement of CuInSe2 film solar cells

XIN JI1,* , JUN CHEN DENG2, JIAN YONG TENG1,* , ZHI YAN3, YI MING MI1, CHAO MIN ZHANG1

Affiliation

  1. College of Fundamental Studies, Shanghai University of Engineering Science, Shanghai 201620, China
  2. College of Urban Railway Transportationg, Shanghai University of Engineering Science, Shanghai 201620, China
  3. College of Material Engineering, Shanghai University of Engineering Science, Shanghai 201620, China

Abstract

Sputtering deposited CuInSe2 films are of potential important as absorber material in thin-film solar cells as long as we can optimize the annealing process to enhance their optical properties. The aim of the present study is to find the phase transformation mechanism and predict the enhanced optical behaviour of CuInSe2 films as a result of annealing processes. The results show that low-temperature annealing processes not exceeding 250 °C can produce regrown and recrystallised CuInSe2 phases to enhance the conversion efficiency of CuInSe2 solar cells. High-temperature annealing processes (at 350 and 400 °C) are found to be vital for the transformation from the CuInSe2 phase to CuSe2/Cu2−xSe and InSex/In2Se3 structures. Finally, three selenization models related to the selenisation of the annealing processes are proposed..

Keywords

CuInSe2 film, Annealing processes, Phase transitions, Vapor deposition, Optical properties.

Citation

XIN JI, JUN CHEN DENG, JIAN YONG TENG, ZHI YAN, YI MING MI, CHAO MIN ZHANG, Annealing effects on phase transformation and optical enhancement of CuInSe2 film solar cells, Optoelectronics and Advanced Materials - Rapid Communications, 7, 11-12, November-December 2013, pp.845-848 (2013).

Submitted at: July 9, 2013

Accepted at: Nov. 7, 2013