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Trioctylphosphine-Assisted Pre-protection Low-Temperature Solvothermal Synthesis of Highly Stable CsPbBr3/TiO2 Nanocomposites
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2021-04-13 , DOI: 10.1021/acs.jpclett.1c00693
Yongqiang Ji 1 , Minqiang Wang 1 , Zhi Yang 1 , Hengwei Qiu 1, 2 , Muhammad Amin Padhiar 1 , Yun Zhou 1 , Hui Wang 1 , Jialin Dang 1 , Nikolai V. Gaponenko 3 , Arshad Saleem Bhatti 4
Affiliation  

Lead halide perovskite quantum dots (PQDs) are reported as a promising branch of perovskites, which have recently emerged as a field in luminescent materials research. However, before the practical applications of PQDs can be realized, the problem of poor stability has not yet been solved. Herein, we propose a trioctylphosphine (TOP)-assisted pre-protection low-temperature solvothermal synthesis of highly stable CsPbBr3/TiO2 nanocomposites. Due to the protection of branched ligands and the lower temperature of shell formation, these TOP-modified CsPbBr3 PQDs are successfully incorporated into a TiO2 monolith without a loss of fluorescence intensity. Because the excellent nature of both parent materials is preserved in CsPbBr3/TiO2 nanocomposites, it is found that the as-prepared CsPbBr3/TiO2 nanocomposites not only display excellent photocatalytic activity but also yield improved PL stability, enabling us to build highly stable white light-emitting diodes and to photodegrade rhodamine B.

中文翻译:

三辛基膦辅助的预保护低温溶剂热合成高稳定性CsPbBr 3 / TiO 2纳米复合材料

据报道,卤化铅钙钛矿量子点(PQDs)是钙钛矿的一个有前途的分支,最近已成为发光材料研究领域。但是,在实现PQD的实际应用之前,尚未解决稳定性差的问题。本文中,我们提出了三辛基膦(TOP)辅助的预保护低温溶剂热合成高度稳定的CsPbBr 3 / TiO 2纳米复合材料。由于支链配体的保护和较低的壳形成温度,这些TOP修饰的CsPbBr 3 PQDs成功地掺入了TiO 2整体材料中,而不会损失荧光强度。因为两种母体材料的优良性质都保留在CsPbBr中3 / TiO 2纳米复合材料,发现制备的CsPbBr 3 / TiO 2纳米复合材料不仅显示出优异的光催化活性,而且还提高了PL稳定性,使我们能够构建高度稳定的白色发光二极管并光降解罗丹明B。
更新日期:2021-04-22
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