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基于Cu+-In3+-Se2--NH3-L2--Cl--H2O體系的常溫全液相法制備CuInSe2粉體

Preparation of basic CuInSe2 nanoparticles in the solution system of Cu+-In3+-Se2--NH3-L2--Cl--H2O

  • 摘要: 采用同時平衡和質量守恒原理對全液相常溫常壓法制備CuInSe2(CIS)粉體過程中Cu+-In3+-Se2--NH3-L2--Cl--H2O體系的熱力學平衡進行分析,并繪制一系列的濃度對數lgc-pH值曲線.依據平衡圖,發現溶液中NH3T的變化主要影響溶液中Cu+T在體系中的濃度變化,L2-T的變化主要影響的是體系中In3+T的濃度變化,而Cl-T的變化對Cu+T和In3+T的濃度變化均有影響,并可發現在pH7.0~8.5時沉淀率最高.依據Cu+-In3+-Se2--NH3-L2--Cl--H2O體系的同時平衡和質量守恒原理,采用全液相常溫常壓法,在pH7.0~8.5條件下制備出粒徑在20~50nm且基本符合標準化學計量比的CIS納米粉體.

     

    Abstract: According to the principles of simultaneous equilibria and mass equilibria, CuInSe2 (CIS) were prepared by total aqueous process at normal pressure and room temperature. A series of thermodynamic equilibrium equations were deduced for the complex system of Cu+-In3+-Se2--NH3-L2--Cl--H2O (T=298 K), and the equilibrium curves of lgc-pH were drawn. It was found from these equilibrium diagrams thatNH3T primarily affected theCu+T concentration,L2-T influenced theIn3+T concentration, andCl-T had impact on both. The highest precipitation coefficient was obtained at pH 7.0-8.5. As a result, based on the principles of simultaneous equilibria and mass equilibria of the Cu+-In3+-Se2--NH3-L2--Cl--H2O system (T=298 K) and used total aqueous process at normal pressure and room temperature, CIS nanoparticles can be synthesized by adjusting the pH value to 7.0-8.5, and their size is about 20 to 50 nm.

     

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