CIGS Solar Cell Having Flexible Substrate Based on Improved Supply of Na and Fabrication Method Thereof
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United States of America Patent
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Issued Date -
Apr 30, 2015
app pub date -
Aug 5, 2013
filing date -
Aug 9, 2012
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Abandoned
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Abstract
A CIGS solar cell having a flexible substrate based on improved supply of Na. The CIGS solar cell includes a substrate formed of a flexible material, a rear electrode formed on the substrate, a CIGS light-absorption layer formed on the rear electrode, a buffer layer formed on the CIGS light-absorption layer, and a front electrode formed on the buffer layer, wherein the rear electrode comprise a single-layered Na-added metal electrode layer. A single-layered Na-added Mo electrode layer, specific resistance of which is about 1/10th the specific resistance under conditions of a process of forming a typical multilayer rear electrode, is applied to the rear electrode, thereby providing a CIGS solar cell having a flexible substrate and high conversion efficiency.
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