Double layer CuInS2 absorber using spray pyrolysis: A better candidate for CuInS2/In2S3 thin film solar cells

作者：Cherian Angel Susan; Jinesh K B; Kashiwaba Y; Abe T; Balamurugan A K; Dash Sitaram; Tyagi A K; Kartha C Sudha; Vijayakumar K P^*

来源：Solar Energy, 2012, 86(6): 1872-1879.

DOI：10.1016/j.solener.2012.02.037

• Spray pyrolysis
• Absorber
• Thin films
• Semiconductors
• Solar cells

In the fabrication of CuInS2/In2S3 solar cell using chemical spray pyrolysis (CSP) deposition technique, one of the major problems is the diffusion of Cu towards the In2S3 layer affecting stability and repeatability of the CuInS2/In2S3 cells. In order to ensure a Cu-free In2S3 layer, a %26apos;double layer structure%26apos; of CuInS2 film, having a Cu-rich first layer and In-rich second layer was deposited using manual CSP technique. In this paper, we present the difference in material properties of single and double layered CuInS2 films and the results of characterisation of the junctions prepared using such films with beta-In2S3 films. Better crystallinity as well as larger and densely packed grains were observed for the CuInS2 films having %26apos;double layer structure%26apos;. Such samples also possessed two band gaps, which was not due to the presence of different phases, but due to the Cu-rich and Cu-poor layers. In addition, their low resistivity makes the double layered CuInS2 film more beneficial for photovoltaic applications.

• 出版日期2012-6
• 单位南阳理工学院