摘要
以水为溶剂、CuCl2,InCl3和Se粉为反应物、NaBH4为还原剂采用低温水热法在200℃反应18h得到了CuInSe2纳米粉末.用X射线粉末衍射仪、X射线光电子能谱仪、场发射扫描电子显微镜、透射电子显微镜对粉体的结构、形貌、成分进行表征.研究表明:所生成纳米粉末的平均颗粒直径在100nm左右;反应温度和时间对产物的生成和形貌有重要影响,在200℃以上反应有利于获得黄铜矿型CuInSe2纳米粉末的纯相,且产物的尺寸随着反应时间的延长而增大.并对CuInSe2粉体的形成机理进行了简单探讨.
Copper indium diselenide nanopowders were hydrothermallly synthesized(200℃,18h)by using water as the solvent,CuCl2,InCl3and Se powder as the starting materials,sodium borohydride as the reductant repectively.X-ray powder diffraction(XRD),X-ray photoelectron spectroscopy(XPS),field-emission scanning electron microscopy(FE-SEM),transmission electron microscopy(TEM),and high-resolution transmission electron microscopy(HRTEM)were used to characterize the obtained nanopowders.The results demonstrate that the average diameter of the as-synthesized nanoparticles is around 100 nm;the reaction temperature is important for the formation of CuInSe2,the powders prepared under the temperature above 200 ℃ is pure CuInSe2 with chalcopyrite structure;time has a great effect on the morphologies of the as-prepared powders,the particle size increases as the reaction time is prolonged.Furthermore,a possible formation mechanism for product was also proposed.
出处
《同济大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2012年第1期73-76,共4页
Journal of Tongji University:Natural Science
基金
国家自然科学基金(50972107)
关键词
铜铟硒
半导体
水热合成
纳米粉体
Copper indium diselenide
semicondutor
hydrothermal route
nanopowders