In-situ synthesis of stable perovskite quantum dots in core-shell nanofibers via microfluidic electrospinning  

作　　者：Rui Cheng Zhi-Bin Liang Haixia Shen Jiazhuang Guo Cai-Feng Wang Su Chen 

机构地区：[1]State Key Laboratory of Materials-Oriented Chemical Engineering,College of Chemical Engineering,and Jiangsu Key Laboratory of Fine Chemicals and Functional Polymer Materials,Nanjing Tech University,Nanjing 210009,China

出　　处：《Chinese Chemical Letters》2023年第3期518-521,共4页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.21736006 and 21978132);the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)。

摘　　要：Perovskite quantum dots(PQDs) possess remarkable optical properties, such as tunable photoluminescence(PL) emission spectra, narrow full width at half maximum(FWHM) and high PL quantum yield(QY), endowing the PQDs great application prospects. However, the inherent structural instability of PQDs has seriously hindered the application of PQDs in various photoelectric devices. In this work, a microfluidic electrospinning method was used to fabricate color-tunable fluorescent formamidinium lead halogen(FAPbX_(3), X = Cl, Br, I) PQDs/polymer core-shell nanofiber films. The core-shell spinning nanofiber not only supplies the interspace for the in-situ formation of PQDs, but also significantly reduces the permeability of moisture and oxygen in the air, which greatly improves the stability of PQDs. After adjusting the composition of precursors, the blue-emissive polystyrene(core) and polymethyl methacrylate(shell) coated FAPbCl_(3) QDs(abbreviated as PS/FAPbCl_(3)/PMMA, hereinafter), green-emissive PS/FAPbBr_(3)/PMMA and redemissive PS/FAPbI_(3)/PMMA nanofiber films were fabricated with the highest PL QY of 82.3%. Moreover,the PS/FAPbBr_(3)/PMMA nanofiber film exhibits great PL stability under blue light irradiation, long-term storage in the air and water resistance test. Finally, the green-and red-emissive nanofiber films were directly applied as light conversion films to fabricate wide-color-gamut display with the color gamut of 125%, indicating their tremendous potentials in optoelectronic applications.

关 键 词：Perovskite quantum dots Microfluidic electrospinning NANOFIBER PL stability Display 

分 类 号：TQ340.64[化学工程—化纤工业] TB383.1[一般工业技术—材料科学与工程]