水辅助制备稳定的CsPbBr3@SiO2纳米粒子  

Water-induced Highly Stable CsPbBr3@SiO2 Composite Nanoparticles

作　　者：杨晓玲[1] 徐腾警 侯璐 陈健壮[1] 朱以华[2] YANG Xiaoling;XU Tengjing;HOU Lu;CHEN Jianzhuang;ZHU Yihua(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)

机构地区：[1]华东理工大学材料国家级实验教学示范中心,上海200237 [2]华东理工大学纳米材料化工研究室,上海200237

出　　处：《实验室研究与探索》2020年第3期11-14,24,共5页Research and Exploration In Laboratory

基　　金：国家自然科学基金项目(21676093,29506045)。

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。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.

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 

分 类 号：O611.3[理学—无机化学] O613.72[理学—化学]