Synthesis and Characterization of Wurtzite Cu2ZnSnS4 Nanocrystals

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概要

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• Copper--zinc--tin--chalcogenide (CZTSSe) with earth abundant elements has attracted increasing attention due to large absorption coefficient and band gap of {\sim}1.5 eV which is near the optimum band gap of single-junction photovoltaic devices. In this study, we used commercially available precursors to produce wurtzite Cu2ZnSnS4 nanocrystals by simple solvothermal synthesis. Different from the typical kesterite or stannite phases of CZTS, the nanocrystals synthesized in this study are in wurtzite phase with hexagonal crystal cell. The n-dodecanethiol was used to control the reactivity of metal ions, leading to the controlled size of CZTS nanoparticle by simply varying the reaction time. Furthermore, the as synthesized CZTS nanocrystals have novel wurtzite crystal structure. As a result, a red shift of absorption band edge between the CZTS nanoparticles with different size was obtained. Our study provides an extending method of CZTS nanocrystal ink preparation awaiting for further photovoltaic device application.

• 2012-10-25

著者

• Wu Ming-Chung

  Department of Materials Science and Engineering, National Taiwan University, Taipei 106-17, Taiwan

• Liao Hsueh-Chung

  Department of Materials Science and Engineering, National Taiwan University, Taipei 106-17, Taiwan

• Jao Meng-Huan

  Department of Materials Science and Engineering, National Taiwan University, Taipei 106-17, Taiwan

• Su Wei-Fang

  Department of Materials Science and Engineering, National Taiwan University, Taipei 106-17, Taiwan

関連論文

• Synthesis and Characterization of Wurtzite Cu2ZnSnS4 Nanocrystals

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