| 水辅助制备稳定的CsPbBr3@SiO2纳米粒子 |
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| 引用本文： | 杨晓玲,徐腾警,侯璐,陈健壮,朱以华.水辅助制备稳定的CsPbBr3@SiO2纳米粒子[J].实验室研究与探索,2020(3):11-14,24. |
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| 作者姓名： | 杨晓玲 徐腾警 侯璐 陈健壮 朱以华 |
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| 作者单位： | 1.华东理工大学材料国家级实验教学示范中心;2.华东理工大学纳米材料化工研究室 |
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| 基金项目： | 国家自然科学基金项目(21676093,29506045)。 |
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| 摘 要： | 针对CsPbBr3钙钛矿量子点存在稳定性差、易被极性溶剂破坏、易发生离子交换等问题,利用含有多支链的有机硅配体γ-巯丙基三乙氧基硅烷和3-氨丙基三乙氧基硅烷,通过配体辅助再沉淀法制备出CsPbBr3@SiO2纳米粒子。研究发现,在制备过程中加入微量的水可以有效地促进有机硅水解缩合,从而诱导CsPbBr3@SiO2纳米粒子的形成。制备得到的纳米粒子直径约为200 nm,光致发光峰(PL)位于508 nm处,在乙醇中存放7 d荧光强度未减弱,在四丁基碘化铵/二氯甲烷中存放6 h未发生离子交换,说明制备得到的纳米粒子具有较好的稳定性。
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| 关 键 词： | 钙钛矿量子点 配体辅助再沉淀法 有机硅 荧光 稳定性 |
Water-induced Highly Stable CsPbBr_3@SiO_2 Composite Nanoparticles |
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| YANG Xiaoling,XU Tengjing,HOU Lu,CHEN Jianzhuang,ZHU Yihua.Water-induced Highly Stable CsPbBr_3@SiO_2 Composite Nanoparticles[J].Laboratory Research and Exploration,2020(3):11-14,24. |
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| Authors: | YANG Xiaoling XU Tengjing HOU Lu CHEN Jianzhuang ZHU Yihua |
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| Institution: | (National Experimental Teaching Demonstration Center of Materials,East China University of Science and Technology,Shanghai 200237,China;School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China) |
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| Abstract: | In this work,we synthesized CsPbBr3@SiO2 nanoparticles using N-propyltriethoxysilane and 3-aminopropyltriethoxysilane through the ligand-assisted reprecipitation method.A little water can accelerate the hydrolysis of the organic silicon and induce the formation of CsPbBr3@SiO2 nanoparticles.The average size of CsPbBr3@SiO2 nanoparticles is approximate 200 nm.The photoluminescence(PL)spectrum peak is located at 508 nm.The SiO2 shell remarkably improves the stability of the nanoparticles,where the light emission of CsPbBr3@SiO2 nanoparticles could be efficiently sustained over 7 days in the polar solvent ethanol without any decay and soaked for 6 h in tetrabutylammonium iodide/dichloromethane without ion exchange. |
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| Keywords: | perovskite quantum dot ligand-assisted reprecipitation(LARP)method organic silicon fluorescent stability |
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