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Dr. SeJin Ahn, Tae Hwa Son, Ara Cho, Dr. Jihye Gwak, Dr. Jae Ho Yun, Dr. Keeshik Shin, Dr. Seoung Kyu Ahn, Dr. Sang Hyun Park and Dr. KyungHoon Yoon CuInSe2 Thin-Film Solar Cells with 7.72 % Efficiency Prepared via Direct Coating of a Metal Salts/Alcohol-Based Precursor Solution ChemSusChem 5

Article first published online: 13 AUG 2012 | DOI: 10.1002/cssc.201200096

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Alternative route available: A simple direct solution coating process for forming CuInSe2 thin films using a low-cost, environmentally friendly precursor solution prepared by mixing metal acetates, ethanol, and monoethylamine is demonstrated. The formation of a carbon impurity layer is largely avoided by using this technique. An initial power conversion efficiency of as high as 7.72 % is achieved by this route.

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