title: Controllable synthesis of wurtzite Cu(2)ZnSnS(4) nanocrystals by hot-injection approach and growth mechanism studies.
abstract: Wurtzite Cu2 ZnSnS4 (WZ-CZTS) has been controllably synthesized through a hot-injection route. The crystal-growth mechanism of WZ-CZTS has been investigated by using time-dependent XRD patterns, TEM images, and absorption spectra analysis, and revealed that WZ-CZTS nucleated and grew from monoclinic Cu7 S4 nanocrystals through phase transformation of Cu7 S4 to WZ-CZTS within 5 min. The synthesis processes are dependent on precursor concentration, reaction temperature, reaction time, organic ligand, and sulfur source and have been studied in detail. It was revealed that the width of the WZ-CZTS nanocrystals was mainly controlled by the precursor concentration, which determines the diameter of Cu7 S4 . The length could be regulated by the ratio of dodecanethiol (DDT) to oleylamine (OLA) and reaction time.
authors.affiliation: Printable Electronics Research Centre, Suzhou Institute of Nano-Tech and Nano-Bionic, Academy of Chinese Sciences (CAS), Suzhou 215123 (P. R. China); School of Chemistry and Materials Science, University of Science and Technology, Hefei 230026 (P. R. China). qluo2011@sinano.ac.cn.
authors.forename: Qun
authors.initials: Q
authors.lastname: Luo
authors.forename: Yongquan
authors.initials: Y
authors.lastname: Zeng
authors.forename: Liwei
authors.initials: L
authors.lastname: Chen
authors.forename: Changqi
authors.initials: C
authors.lastname: Ma
keywords: controllable synthesis; crystal growth; nanostructures; phase transformations; wurtzite CZTS