Solution−Liquid−Solid Growth of Ternary Cu−In−Se Semiconductor Nanowires from Multiple- and Single-Source Precursors

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• 作者：Alfred J. Wooten ; Donald J. Werder ; Darrick J. Williams ; Joanna L. Casson ; Jennifer A. Hollingsworth
• 刊名：Journal of the American Chemical Society
• 出版年：2009
• 出版时间：November 11, 2009
• 年：2009
• 卷：131
• 期：44
• 页码：16177-16188
• 全文大小：431K
• 年卷期：v.131,no.44(November 11, 2009)
• ISSN：1520-5126

文摘

Ternary CuInSe₂ nanowires were synthesized for the first time by the solution−liquid−solid (SLS) mechanism. Here, both metal−organic multiple- and single-source molecular precursors were thermally decomposed in the presence of molten metal nanoparticles and coordinating ligands. The nature of the precursor—multiple- compared to single-source (wherein Cu−Se−In bonds are effectively preformed)—as well as the choice of coordinating ligands, reaction temperature, and reactant order-of-addition strongly affected the morphology and composition of the reaction product obtained. Crystalline, straight, and nearly stoichiometric CuInSe₂ nanowires were most readily achieved using the single-source precursor; however, careful tuning of reaction conditions could also be used to obtain high-quality nanowires from multiple-source precursor systems. The CuInSe₂ nanowires are strong light absorbers from the near-infrared through the visible and ultraviolet spectral regions and, thereby, comprise new soluble and processable “building blocks” for applications in solar-light harvesting.