A facile route to synthesize chalcopyrite CuInSe2 nanocrystals in non-coordinating solvent
A facile route to synthesize chalcopyrite CuInSe2 nanocrystals in non-coordinating solvent
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DOI：
10.1088/0957-4484/18/2/025602
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发表时间：
2007-01-17
期刊：
影响因子：
3.5
通讯作者：
Li, Yongfang
中科院分区：
文献类型：
--
作者：
Zhong, Haizheng;Li, Yunchao;Li, Yongfang
使用链烷硫醇作为配体和非配位十八碳烯作为溶剂，开发了一种合成 CuInSe2 纳米晶体的简便路线。根据反应温度和时间，获得 CuInSe2 纳米粒子和纳米板。当反应温度设定为180℃并反应1小时时，生成了平均尺寸为6.2nm的CuInSe2纳米粒子。随着反应时间延长至3小时，纳米颗粒内部出现纳米板。当反应温度升至210℃并反应3小时时，合成了具有锋利边缘的三角形或六边形CuInSe2纳米片。有人提出，奥斯特瓦尔德熟化导致 CuInSe2 纳米颗粒在较高温度下形态演化为纳米板。通过透射电子显微镜（TEM）、选区电子衍射（SAED）、X射线衍射（XRD）和X射线光电子能谱（XPS）对纳米颗粒和纳米板进行了表征。由于量子限制，与块体材料相比，CuInSe2 纳米颗粒的紫外-可见吸收光谱明显蓝移。
A facile route for synthesizing CuInSe2 nanocrystals was developed using an alkanethiol as ligand and noncoordinating octadecene as solvent. The CuInSe2 nanoparticles and nanoplates were obtained, depending on the reaction temperature and time. When the reaction temperature was set at 180 degrees C and reaction for an hour, CuInSe2 nanoparticles with an average size of 6.2 nm were produced. As the reaction time was prolonged to 3 h, nanoplates appeared inside the nanoparticles. When the reaction temperature was elevated to 210 degrees C and reaction for 3 h, triangular or hexagonal CuInSe2 nanoplates with sharp edges were synthesized. It was proposed that the Ostwald ripening induced the morphology evolution of the CuInSe2 nanoparticles into nanoplates at the higher temperature. The nanoparticles and nanoplates were characterized by transmission electron microscopy (TEM), selected area electron diffraction (SAED), x-ray diffraction (XRD) and x-ray photoelectron spectroscopy (XPS). The UV-vis absorption spectra of the CuInSe2 nanoparticles were significantly blue-shifted in comparison with the bulk material due to the quantum confinement.