Synthesis of Copper鈥揂ntimony-Sulfide Nanocrystals for Solution-Processed Solar Cells

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• 作者：Satoshi Suehiro ; Keisuke Horita ; Masayoshi Yuasa ; Tooru Tanaka ; Katsuhiko Fujita ; Yoichi Ishiwata ; Kengo Shimanoe ; Tetsuya Kida
• 刊名：Inorganic Chemistry
• 出版年：2015
• 出版时间：August 17, 2015
• 年：2015
• 卷：54
• 期：16
• 页码：7840-7845
• 全文大小：418K
• ISSN：1520-510X

文摘

The p-type nanocrystals (NCs) of copper-based chalcogenides, such as CuInSe₂ and Cu₂ZnSnS₄, have attracted increasing attention in photovoltaic applications due to their potential to produce cheap solution-processed solar cells. Herein, we report the synthesis of copper鈥揳ntimony-sulfide (CAS) NCs with different crystal phases including CuSbS₂, Cu₃SbS₄, and Cu₁₂Sb₄S_13. In addition, their morphology, crystal phase, and optical properties were characterized using transmission electron microscopy, X-ray diffractometry, UV鈥搗is鈥搉ear-IR spectroscopy, and photoemission yield spectroscopy. The morphology, crystal phase, and electronic structure were significantly dependent on the chemical composition in the CAS system. Devices were fabricated using particulate films consisting of CAS NCs prepared by spin coating without a high-temperature treatment. The CAS NC-based devices exhibited a diode-like current鈥搗oltage characteristic when coupled with an n-type CdS layer. In particular, the CuSbS₂ NC devices exhibited photovoltaic responses under simulated sunlight, demonstrating its applicability for use in solution-processed solar cells.