Well-dispersed, size-tunable chalcopyrite CuInSe₂ nanocrystals and its ink-coated thin films by polyhydric solution chemical process

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• 作者：Hui Liu^a ; Zhengguo Jin^a ; ^{zhgjin@tju.edu.cn} ; Weidong Wang^a ; Yueqiu Wang^a ; Haiyan Du^b
• 关键词：CuInSe2 ; Nanocrystalline materials ; Thin films ; TEG solution synthesis ; Solar cells
• 刊名：Materials Letters
• 出版年：2012
• 期刊代码：59_0167577x
• 类别：ms
• 出版时间：15 August, 2012
• 卷：81
• 期：Complete
• 页码：173-176
• 文件大小：1006 K

摘要

Single-phase, near-stoichiometry and well-dispersed chalcopyrite CuInSe₂ nanocrystals were synthesized by a facile, ambient pressure solution chemical route using triethylene glycol as solvent, copper(II) chloride, indium(III) chloride and selenium powder as precursors. Crystallization, morphology, chemical stoichiometry and light property of the synthesized nanocrystals were characterized. Size dependence of the nanocrystals on different alkaline conditions, respectively adding sodium hydroxide, triethanolamine and ethylenediamine into reaction solutions was investigated. The synthesized nanocrystals were used to prepare ethanol-based colloidal inks and then deposit flat, dense and (112) oriented chalcopyrite thin films by layer-by-layer ink-dip-coating method and annealing at 550 掳C in Ar. I-V characteristics of the PV devices with the ink-coated CuInSe₂ light-absorbing layer were measured.