摘要
如何在钝化保护纳米晶的同时避免破坏其发光性能是当前提升钙钛矿纳米晶材料稳定性的研究重点。本文基于热注入法和水诱导相变法制备了CsPbBr_(3)纳米晶,分析了其荧光稳定性与纳米晶结构形貌间的内在联系,并证明了通过水处理诱导Cs4PbBr6纳米晶相变合成的WT-CsPbBr_(3)纳米晶具有优化的水稳定性。接着,通过水解正硅酸甲酯引入了硅壳层结构,得到了环境稳定性优异的WT-CsPbBr_(3)@SiO_(2)荧光粉,在空气中放置5个月几乎无荧光衰减。最后,通过引入聚甲基丙烯酸甲酯树脂封装荧光粉制得了优质发光薄膜。该薄膜可应用于LED荧光转换,且制备流程简易、成本低。
How to provide passivation protection for nanocrystals and avoid damage to their luminescent properties has become the research focus of the current strategy to improve the stability of perovskite nanocrystals.Fluorescent nanocrystals of CsPbBr_(3) were synthesized by heat implantation(HI)and water induced phase transformation(WT),respectively,and fluorescent nanocrystals of WT-CsPbBr_(3) were synthesized by water treatment induced phase transformation of non-fluorescent nanocrystals of Cs4PbBr6.Then,tetramethylorthosilicate(TMOS)was used for rapid hydrolysis to form silicon shell,which greatly improved the stability of WT-CsPbBr_(3)@SiO_(2).Finally,the fluorescent film was prepared by using PMMA encapsulated phosphor composite materials,and used for LED fluorescence conversion,which proved that it can be used as a high-quality light color conversion film and has the advantages of simple preparation process and low cost.
作者
李雪松
谢毓俊
区琼荣
张树宇
LI Xuesong;XIE Yujun;OU Qiongrong;ZHANG Shuyu(Institute for Electric Light Sources, School of Information Science and Technology, and Academy for Engineering and Technology, Fudan University, Shanghai 200433, China)
出处
《照明工程学报》
2021年第4期63-68,共6页
China Illuminating Engineering Journal
基金
国家自然科学基金(项目编号:61705042)。
关键词
钙钛矿
纳米晶
稳定性
荧光薄膜
发光性能
perovskite
nanocrystal
stability
fluorescent film
luminescent properties
