Composition-tunable Cu2(Ge1−x,Snx)(S3−y,Sey) colloidal nanocrystals: synthesis and characterization†
Abstract
A facile colloidal approach was developed to prepare cubic Cu2(Ge1−x,Snx)(S3−y,Sey) nanocrystals (NCs) (0 ≤ x ≤ 1, 0 ≤ y ≤ 3). The band gaps of the NCs can be tuned in the range of 1.35–2.45 eV by varying the chemical compositions, and the NCs display promising applications in solar energy utilization.