Abstract
Halide perovskite quantum dots (PQDs) are promising materials for diverse applications including displays, light‐emitting diodes, and solar cells due to their intriguing properties such as tunable bandgap, high photoluminescence quantum yield, high absorbance, and narrow emission peaks. Despite the prosperous achievements over the past several years, PQDs face severe challenges in terms of stability under different circumstances. Currently, researchers have overcome part of the stability problem, making PQDs sustainable in water, oxygen, and polar solvents for long‐term use. However, halide PQDs are easily degraded under continuous irradiation, which significantly limits their potential for conventional applications. In this study, an oleic acid/oleylamine (traditional surface ligands)‐free method to fabricate perovskite quantum dot papers (PQDP) is developed by adding cellulose nanocrystals as long‐chain binding ligands that stabilize the PQD structure. As a result, the relative photoluminescence intensity of PQDP remains over ≈90% under continuous ultraviolet (UV, 16 W) irradiation for 2 months, showing negligible photodegradation. This proposed method paves the way for the fabrication of ultrastable PQDs and the future development of related applications.
Highlights
perovskite quantum dots (PQDs) halide PQDs are degraded under continuous irradiation, which significantly limits their potential for conventional applications
An oleic acid/oleylamine-free method to fabricate perovskite quantum dot papers (PQDP) is developed by adding cellulose can be susceptible to degradation under
Instead of mixing carboxylic acid and alkylamines in perovskite precursor, we used the cellulose nanocrystal (CNC) with a few hundred nanometers in length which contains a large amount of -HSO3− and -O− group to synthesize the perovskite quantum dot paper (PQDP)
Summary
Li, Ting-You; Xu, Xuezhu; Lin, Chun-Ho; Guan, Xinwei; Hsu, WeiHao; Tsai, Meng-Lin; Fang, Xiaosheng; Wu, Tom; He, Jr-Hau. Li, T., Xu, X., Lin, C., Guan, X., Hsu, W., Tsai, M.,. UV Resistant Inch-Scale Hybrid Perovskite Quantum Dot Papers.
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