Open AccessHighly UV Resistant Inch‐Scale Hybrid Perovskite Quantum Dot Papers
Author(s) -
Li TingYou,
Xu Xuezhu,
Lin ChunHo,
Guan Xinwei,
Hsu WeiHao,
Tsai MengLin,
Fang Xiaosheng,
Wu Tom,
He JrHau
Publication year - 2020
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.201902439
Subject(s) - quantum dot , oleylamine , perovskite (structure) , materials science , photoluminescence , optoelectronics , fabrication , nanocrystal , nanotechnology , quantum yield , photovoltaics , band gap , photovoltaic system , chemical engineering , optics , physics , pathology , engineering , fluorescence , biology , medicine , ecology , alternative medicine
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.