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Cu_2ZnSnS_4纳米晶的溶剂热法制备和表征 被引量:2

Preparation and Characterization of Cu_2ZnSnS_4 Nanocrystal by Solvent Thermal Method
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摘要 利用溶剂热制备了Cu2ZnSnS4(CZTS)球形纳米晶。采用x射线衍射(XRD)、拉曼光谱、扫描电子显微镜(SEM)、高分辨透射电子显微镜(HRTEM)、能量色散谱(EDS)和紫外一可见分光光度计对产物的物相结构、形貌、化学组分及光学性能进行表征。结果表明:所制备的CZTS球形纳米晶具有锌黄锡矿结构,球形颗粒的直径为190~300nm,每个球形颗粒是由很多平均尺寸大约24nm的纳米晶构成。纳米晶具有锌黄锡矿结构,其禁带宽度约为1.55eV。同时研究了反应前驱溶液中不同量的硫脲和氯化锌对所制备的CZTS纳米颗粒的结构、原子组分比和形貌的影响规律,并对其形成机理进行了初步探讨。 The Cu2ZnSnS4 (CZTS) spherical nanoparticles were prepared by solvent thermal method. The crystallographic structure, morphology, chemical composition and optical properties of CZTS nanopartieles were investigated by X-ray diffraction (XRD), Raman spectroscopy, scanning electronic microscope (SEM), high resolution transmission electron microscopy (TEM), energy dispersive spectrometry (EDS) and UV-vis spectroscopy. The results revealed that CZTS nanoparticle is in kesterite-type. The diameters of spherical nanoparticles were 190-300 nm. Each spherical particle contains several nanocrystals about 24 nm in crystallite size, and the band gap was 1.55 eV. The effects of molar weight of thiourea and zinc (II) chloride in precursor solutions on crystallographic structure, composition and morphology have been studied. The formation mechanism of CZTS nanoparticles was discussed.
出处 《人工晶体学报》 EI CAS CSCD 北大核心 2013年第11期2298-2303,共6页 Journal of Synthetic Crystals
基金 广东省省部产学研项目(2011A090200003) 广州市科技计划项目(12C52111614)
关键词 i溶剂热 Cu2ZnSnS4 球形纳米颗粒 光学性能 solvothermal method Cu2ZnSnS4 spherical nanoparticle optical property
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