Effects of hydrazine on the solvothermal synthesis of Cu₂ZnSnSe₄ and Cu₂CdSnSe₄ nanocrystals for particle-based deposition of films

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• 作者：Ming-Hung Chiang ; Yaw-Shyan Fu ; Cheng-Hung Shih ; Chun-Cheng Kuo ; Tzung-Fang Guo ; Wen-Tai Lin
• 关键词：Cu2ZnSnSe4 nanocrystals ; Hydrazine ; Solvothermal synthesis ; Raman spectra
• 刊名：Thin Solid Films
• 出版年：2013
• 出版时间：1 October, 2013
• 年：2013
• 卷：544
• 期：Complete
• 页码：291-295
• 全文大小：884 K

文摘

The effects of hydrazine on the synthesis of Cu₂ZnSnSe₄ (CZTSe) and Cu₂CdSnSe₄ (CCTSe) nanocrystals in an autoclave as a function of temperature and time were explored. On heating at 190 ¡ãC for 24-72 h, pure CZTSe and CCTSe nanocrystals could readily grow in the hydrazine-added solution, while in the hydrazine-free solution the intermediate phases such as ZnSe, Cu₂Se, and Cu₂SnSe₃, and Cu₂SnSe₃ and CdSe associated with the CZTSe and CCTSe nanocrystals grew, respectively. This result reveals that hydrazine can speed up the synthesis of pure CZTSe and CCTSe nanocrystals via a solvothermal process. The mechanisms for the hydrazine-enhanced growth of CZTSe and CCTSe nanocrystals were discussed. The pure CZTSe and CCTSe nanocrystals were subsequently fabricated to the smooth films by spin coating without further annealing in selenium atmosphere. This processing may be beneficial to the fabrication of the absorber layer for solar cells and thermoelectric devices.