title: Cu2Ge(S(3-x)Se(x)) colloidal nanocrystals: synthesis, characterization, and composition-dependent band gap engineering.
abstract: A facile solution-phase route was developed to synthesize a family of monodisperse Cu2Ge(S(3-x)Se(x)) 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 a nearly linear relationship between them. The band structures of the NCs were studied by cyclic voltammetry and UV-vis absorption spectroscopy. The conducting behavior was revealed to be p-type for these NCs by photoelectrochemical measurements. Their photovoltaic applicability was finally assessed by fabricating solar cells with the Cu2Ge(S2Se) NCs as light harvester and CdS nanorods as electron conducting materials.
authors.affiliation: State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China.
authors.forename: Chi
authors.initials: C
authors.lastname: Yang
authors.forename: Bin
authors.initials: B
authors.lastname: Zhou
authors.forename: Shu
authors.initials: S
authors.lastname: Miao
authors.forename: Chunyan
authors.initials: C
authors.lastname: Yang
authors.forename: Bing
authors.initials: B
authors.lastname: Cai
authors.forename: Wen-Hua
authors.initials: WH
authors.lastname: Zhang
authors.forename: Xin
authors.initials: X
authors.lastname: Xu