Room-temperature synthesis of cyan CsPb(Cl/Br)3/SiO2 nanospheres with LiCl-H2O solution
Room-temperature synthesis of cyan CsPb(Cl/Br)3/SiO2 nanospheres with LiCl-H2O solution
复制标题
DOI：
10.3788/col202018.071601
复制
发表时间：
2020-06
影响因子：
3.5
通讯作者：
Peiyuan Cao;Bobo Yang;Yanrong Cao;Fei Zheng;Jun Zou
中科院分区：
文献类型：
--
作者：
Peiyuan Cao;Bobo Yang;Yanrong Cao;Fei Zheng;Jun Zou
保持钙钛矿型量子点(QD)优良的光致发光特性的策略有很多。在这里，我们提出了一种在室温下制备青色CSPB(Cl/Br)3/SiO_2纳米球的简便有效的方法。通过加入LiCl-H2O溶液和阴离子交换反应，得到立方CSPB(Cl/Br3)3。以3-氨丙基三乙氧基硅烷为辅助剂，采用沉淀-包覆法从溶胶-凝胶溶液中制备了量子点/二氧化硅复合材料。透射电子显微镜图像和傅里叶变换红外光谱表明，量子点确实嵌入了二氧化硅物质中。此外，湿稳定性和热稳定性表明该复合材料具有很大的应用价值。最后，青色量子点@SiO_2粉末具有高达84%的高荧光量子产率；稳定的青色荧光粉确实具有在商业全光谱显示中发挥关键作用的巨大潜力。
There are many strategies to maintain the excellent photoluminescence (PL) characteristics of perovskite quantum dots (QDs). Here, we proposed a facile and effective method to prepare cyan CsPb(Cl/Br)3/SiO2 nanospheres at room temperature. Cubic CsPb(Cl/Br)3 was obtained by adding a LiCl-H2O solution and anion exchange reaction. With (3-aminopropyl)triethoxysilane as an auxiliary agent, a QDs/SiO2 composite was extracted from a sol-gel solution by precipitate-encapsulation method. The transmission electron microscopy images and Fourier transform infrared spectra indicated the QDs were indeed embedded in silica substances. Besides, humidity stability and thermal stability show the composite possesses a great application value. Finally, cyan QDs@SiO2 powder has a high PL quantum yield of up to 84%; the stable cyan fluorescent powder does have great potential to play a key role in commercial full spectrum display.