Preparation of Cu_2ZnSn_(1-x)Ge_xS_4 Single Crystals by Molten Salt Method

摘要

Cu_2ZnSn_(1-x)Ge_xS_4 (CZTGS) Single crystals have been produced within a sealed quartz ampoule via molten salttechnique using CsCl as the molten flux. The synthesized crystals have been analyzed with X-ray diffraction (XRD), Raman, scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDS) and transmission electron microscope (TEM) for compositional and structural characterizations. XRD patterns and Raman spectra showed that the CZTGS crystals exhibit pure kesterite phase with (112) preferred orientation. The optical properties of the single crystals have been analyzed by UV-vis spectra. The synthesized crystals have suitable properties and are feasible candidates of absorber materials in solar cells.