Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale; Department of Chemistry, University of Science and Technology of China, Hefei 230026, People's Republic of China.
Nanoscale Res Lett. 2013 Dec 13;8(1):524. doi: 10.1186/1556-276X-8-524.
CuGaS2 (CGS) nanoplates were successfully synthesized by one-pot thermolysis of a mixture solution of CuCl, GaCl3, and 1-dodecanethiol in noncoordinating solvent 1-octadecene. Their morphology, crystalline phase, and composition were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), powder X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS), respectively. Crystalline structure analysis showed that the as-prepared CGS nanoplates were polytypic, in which the wurtzite phase was interfaced with zincblende domains. The growth process of CGS nanoplates was investigated. It was found that copper sulfide nanoplates were firstly formed and then the as-formed copper sulfide nanoplates gradually transformed to CGS nanoplates with proceeding of the reaction. The optical absorption of the as-synthesized CGS nanoplates was also measured and the direct optical bandgap was determined to be 2.24 eV.
CuGaS2 (CGS) 纳米板通过混合溶液中 CuCl、GaCl3 和 1-十二硫醇在非配位溶剂 1-十八烯中的一锅热解成功合成。通过扫描电子显微镜 (SEM)、透射电子显微镜 (TEM)、高分辨率透射电子显微镜 (HRTEM)、粉末 X 射线衍射 (XRD) 和 X 射线光电子能谱 (XPS) 分别对其形貌、晶体相和组成进行了表征。结晶结构分析表明，所制备的 CGS 纳米板是多型的，其中纤锌矿相与闪锌矿域相连接。研究了 CGS 纳米板的生长过程。结果发现，首先形成了硫化铜纳米板，然后随着反应的进行，形成的硫化铜纳米板逐渐转化为 CGS 纳米板。还测量了所合成的 CGS 纳米板的光吸收，确定了直接光学带隙为 2.24 eV。
