Improvement of the Electrical Properties of Cu-Poor CuInS2 Thin Films by Sodium Incorporation
- 1 November 1998
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 37 (11B) , L1370-1372
- https://doi.org/10.1143/jjap.37.l1370
Abstract
We investigated the effects of intentional sodium incorporation on the electrical conductivity of Cu-poor CuInS2 thin films. CuInS2 films were fabricated by sulfurization of In–S/Cu/Na2S/In precursors. Sodium incorporation resulted in a remarkable increase in the lateral conductivity and the cell efficiency of CuInS2-based solar cells. Photoluminescence measurements revealed that the enhancements were attributed to the annihilation of donor states, most likely In interstitials, by sodium incorporation.Keywords
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