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首页> 外文期刊>Chemistry, an Asian journal >Controllable Synthesis of Wurtzite Cu2ZnSnS4 Nanocrystals by Hot-Injection Approach and Growth Mechanism Studies
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Controllable Synthesis of Wurtzite Cu2ZnSnS4 Nanocrystals by Hot-Injection Approach and Growth Mechanism Studies

机译:热注射法可控制合成纤锌矿型Cu2ZnSnS4纳米晶体及其生长机理研究

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摘要

Wurtzite Cu2ZnSnS4 (WZ-CZTS) has been controllably synthesized through a hot-injection route. The crystal-growth mechanism of WZ-CZTS has been investigated by using time-dependent XRD patterns, TEM images, and absorption spectra analysis, and revealed that WZ-CZTS nucleated and grew from monoclinic Cu7S4 nanocrystals through phase transformation of Cu7S4 to WZ-CZTS within 5 min. The synthesis processes are dependent on precursor concentration, reaction temperature, reaction time, organic ligand, and sulfur source and have been studied in detail. It was revealed that the width of the WZ-CZTS nanocrystals was mainly controlled by the precursor concentration, which determines the diameter of Cu7S4. The length could be regulated by the ratio of dodecanethiol (DDT) to oleylamine (OLA) and reaction time.
机译:纤锌矿型Cu2ZnSnS4(WZ-CZTS)已通过热注射途径可控制地合成。通过使用随时间变化的X射线衍射图,TEM图像和吸收光谱分析研究了WZ-CZTS的晶体生长机理,结果表明WZ-CZTS是通过单相Cu7S4纳米晶体通过Cu7S4到WZ-CZTS的相变而成核并生长的5分钟内合成过程取决于前体浓度,反应温度,反应时间,有机配体和硫源,并已进行了详细的研究。结果表明,WZ-CZTS纳米晶体的宽度主要受前驱体浓度控制,前驱体浓度决定了Cu7S4的直径。该长度可以通过十二烷硫醇(DDT)与油胺(OLA)的比例和反应时间来调节。

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