Strongly Fluorescent Quaternary Cu–In–Zn–S Nanocrystals Prepared from Cu1-xInS2 Nanocrystals by Partial Cation Exchange

• DOI: 10.1021/cm301211e
• Publication Date: 2012-05-30T00:11:37Z
• Authors: Luca De Trizio; Mirko Prato; Alessandro Genovese; Alberto Casu; Mauro Povia; Roberto Simonutti; Marcelo J. P. Alc...; Cosimo D’Andrea; Francesco Tassone; Liberato Manna
• Keywords: Quantum yield

We report a high-yield, low cost synthesis route to colloidal Cu1-xInS2 nanocrystals with tunable amount of Cu vacancies in the crystal lattice. These are then converted into quaternary Cu–In–Zn–S (CIZS) by partial exchange Cu+ and In3+ cations Zn2+ cations. The photoluminescence quantum yield these CIZS could be tuned up record 80%, depending on copper vacancies.