Yang C, Zhou B, Miao S, Cai B, Zhang WH, Xu X
Cu2Ge(S3-xSeX) Colloidal Nanocrystals: Synthesis, Characterization, and Composition-dependent Band Gap Engineering.
Journal of the American Chemical Society. 2013 Apr 06;
A facile solution-phase route was developed to synthesize a family of monodisperse Cu2Ge(S3-xSex) alloyed nanocrystals (NCs) with controlled composition across the entire range (0 ≤ x ≤ 3). The band gaps of the resultant NCs can be engineered by tuning the compositions with nearly linear relationship between them. The band structures of the NCs were studied by cyclic voltammetry and UV-vis absorption spectroscopy. The con-ducting behavior was reveled to be p-type for these NCs by pho-toelectrochemical measurement. Their photovoltaic applicability were finally assessed by fabricating solar cells with the Cu2Ge(S2Se) NCs as light harvester and CdS nanorods as electron conducting materials.