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采用同时平衡和质量守恒原理对全液相常温常压法制备CuInSe2(CIS)粉体过程中Cu+-In3+-Se2--NH3-L2--Cl--H2O体系的热力学平衡进行分析,并绘制一系列的浓度对数lgc-p H值曲线.依据平衡图,发现溶液中[NH3]T的变化主要影响溶液中[Cu+]T在体系中的浓度变化,[L2-]T的变化主要影响的是体系中[In3+]T的浓度变化,而[Cl-]T的变化对[Cu+]T和[In3+]T的浓度变化均有影响,并可发现在pH 7.0~8.5时沉淀率最高.依据Cu+-In3+-Se2--NH3-L2--Cl--H2O体系的同时平衡和质量守恒原理,采用全液相常温常压法,在pH 7.0~8.5条件下制备出粒径在20~50 nm且基本符合标准化学计量比的CIS纳米粉体.
The thermodynamic equilibrium of Cu + -In3 + -Se2 - NH3-L2 - Cl - H2O system during preparation of CuInSe2 (CIS) powder by all-liquid normal temperature and pressure method was analyzed by simultaneous equilibrium and mass conservation principle. Series of concentration logarithm lgc-p H value curve.According to the equilibrium diagram, we found that the change of [NH3] T in solution mainly affects the concentration change of [Cu +] T in solution, and the change of [L2-] T mainly affects Is the change of concentration of [In3 +] T in the system, and the change of [Cl-] T has effect on the change of concentration of [Cu +] T and [In3 +] T and found that the precipitation rate is the highest at pH 7.0-8.5 Cu + -In3 + -Se2 - NH3-L2 - Cl - H2O system and the principle of conservation of mass, the use of all-liquid normal temperature and pressure method at pH 7.0-8.5 prepared under the conditions of particle size 20 ~ 50 nm And basically in line with the standard stoichiometric CIS nano-powder.