The phase transformation of CuInS2 from chalcopyrite to wurtzite

Abstract

In the present work, CuInS₂ nanoparticles have been successfully synthesized by water-bath method with deionized water as solvent and thioglycolic acid as complexing agent at 80°C. The phase transition of CuInS₂ from chalcopyrite to wurtzite was realized by adjusting the pH value of reaction solution. The emergence of Cu₂S in the condition of higher pH value of reaction solution led to the formation of wurtzite CuInS₂. This facile method that controls the phase structure by adjusting the solution pH value could open a new way to synthesize other I-III-VI₂ ternary semiconductor compounds.