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Synthesis and Morphological Evolution of CuGaS2 Nanostructures via a Polyol Method
Qiang-chun Liu,Kai-bin Tang*
Author NameAffiliationE-mail
Qiang-chun Liu Department of Chemistry, University of Science and Technology of China, Hefei 230026, China  
Kai-bin Tang* Department of Chemistry, University of Science and Technology of China, Hefei 230026, China kbtang@ustc.edu.cn  
Abstract:
Using ethylene glycol as solvent and reductant, CuCl2·2H2O, (NH2)2CS and self-prepared GaCl3 as the starting materials, CuGaS2 nanostrucutures were synthesized on a large scale at 220 ℃. Powder X-ray diffraction,transmission electron microscopy, field-emission scanning electron microscope, high-resolution transmission electron microscopy and X-ray photoelectron spectroscopy were used to characterize the products. It demonstrated the evolution of the CuGaS2 particles from spherical assemblies to flowerlike morphology, over time,at 220 ℃. Simultaneously, we elucidated the specific roles of reaction temperature, reaction time and solvent in the formation of the final CuGaS2 nanostructures. A possible formation mechanism of CuGaS2 nanostrucutures was also discussed. The room temperature photoluminescence spectrum showed blue-shift and an increase of intensity, with a decrease in the sizes of CuGaS2 particles.
Key words:  Chalcogen, Semiconductor, Nanostructure
FundProject:
醇体系中合成CuGaS2纳米晶及其形貌演变
刘强春,唐凯斌*
摘要:
以CuCl2¢2H2O,自制的GaCl3和(NH2)2CS为原料,在乙二醇体系中合成了花状结构的CuGaS2纳米晶.产物分别用X射线粉末衍射仪、透射电子显微镜、场发射扫描电子显微镜、高分辩透射电子显微镜和X射线光电子能谱仪进行了表征.实验结果表明,220 ±C反应24 h得到均匀的花状纳米结构CuGaS2,它是由厚度80?100 nm的片晶组成.同时,通过反应时间的控制,可以清楚的看到由纳米颗粒到纳米球以及花状纳米结构的演变过程.另外,研究了反应温度、反应时间、溶剂等对产物和形貌的影响.此外,对花状结构纳米晶的生长机理进行了初步的探讨.室温荧光光谱表明,随粒径的降低,发光位发生了部分蓝移.
关键词:  硫族化合物, 半导体, 纳米结构
DOI:10.1360/cjcp2006.19(4).335.6
分类号: