Controlled Stoichiometry for Quaternary CuIn_<i>x</i>Ga_1−<i>x</i>S₂Chalcopyrite Nanoparticles from Single-Source Precursors via Microwave Irradiation

Abstract

We report the synthesis of quaternary CuInxGa1−xS2 (0 ≤ x ≤1) chalcopyrite nanoparticles from decomposition of two molecular single source precursors (SSPs), (Ph3P)2Cu(μ-SEt)2In(SEt)2 (1) and (Ph3P)2Cu(μ-SEt)2Ga(SEt)2 (2), via microwave irradiation. We were able to precisely control stoichiometry and bandgaps of quaternary CuInxGa1−xS2 nanoparticles ranging from 1.40 to 2.30 eV.