摘要
以氯化亚铜(CuCl)、氯化铟(InCl_3·4H_2O)作为金属源,溶解在三辛基膦(TOP)中的Se粉作硒源,利用油胺(OLA)作为配体、十八烯作为溶剂,采用热注入法合成出了CuInSe_2纳米晶(NCs),研究了反应温度对产物的影响。采用X射线衍射仪(XRD)、透射电子显微镜(TEM)、能谱仪(EDS)和紫外-可见分光光度计(UV-Vis)等测试手段对CuInSe_2纳米晶的晶体结构、形貌、化学组分和光学性能进行了表征。实验结果表明:通过调控反应温度合成了具有不同形貌的黄铜矿结构的CuInSe_2纳米晶,纳米晶的形貌由三角形或四边形向球形演化,其晶粒平均尺寸为3.71~13.65 nm,其光学带隙Eg在1.75~1.50 e V之间变化。所得到的产物在有机溶剂甲苯中分散性良好,这样的"墨水"溶液在后期制备薄膜太阳能电池更有利。
CuInSe2nanocrystals(NCs)were synthesized by hot injection method using cuprous chloride(CuCl),indium chloride(InCl3?4H20),and selenium powder(Se)dissolving in a trioctylphosphine(TOP)solution as raw materials and Oleylamine(OLA)and octadecylene(ODE)as ligand and solvent.Crystal structure,component and optical properties of as-synthesized CuInSe2NCs samples were characterized by X-ray diffractometer(XRD),transmission electron microscopy(TEM),energy dispersive spectroscopy(EDS),Ultraviolet-visible spectrophotometer(UV-vis).The influence of different reaction temperatures on the crystal structure,morphology,chemical composition and optical properties of CuInSe2was investigated.The results show that the CuInSe2NCs possess different morphology with chalcopyrite structure,the morphology of NCs evolve from triangle or quadrangle to sphere.The average grain size is in the range of3.71-13.65nm.The band gap of the NCs prepared at different reaction temperatures vary between1.75eV and1.50eV.Stable"ink"can be formed when the CuInSe2nanocrystals are dispersed in the organic solvent such as toluene,and such"ink"might have a practical application in CuInSe2-based solar cells.
作者
夏冬林
杲皓冉
李云峰
秦可
XIA Dong-lin;GAO Hao-ran;LI Yun-feng;QIN Ke(Wuhan University of Technology, Wuhan 430070, China;State Key Laboratory of Silicate Materials for Architectures Wuhan 430070, China)
出处
《人工晶体学报》
CSCD
北大核心
2017年第10期1907-1912,共6页
Journal of Synthetic Crystals
基金
武汉市科技计划项目(2015010101010006)
武汉理工大学优秀硕士学位论文培养基金(2016-YS-013)
