Highly UV Resistant Inch‐Scale Hybrid Perovskite Quantum Dot Papers. Issue 17 (24th July 2020)

• Record Type: Journal Article
• Authors: Li, Ting‐You; Xu, Xuezhu; Lin, Chun‐Ho; Guan, Xinwei; Hsu, Wei‐Hao; Tsai, Meng‐Lin; Fang, Xiaosheng; Wu, Tom; He, Jr‐Hau
• Is Part Of: Advanced science. Volume 7:Issue 17(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-07-24
• Subjects: cellulose nanocrystals -- displays -- light‐emitting diodes -- papers -- perovskites -- quantum dots -- solar cells; Science -- Periodicals; 505
• DOI: 10.1002/advs.201902439
• Languages: English
• ISSNs: 2198-3844

Abstract

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. Abstract : Solid‐state perovskite quantum dot papers are fabricated using a unique vacuum filtration growth method without a purification process. The bonding between cellulose nanocrystals and perovskite quantum dots makes the hybrid structure stable, and record high UV stability and thermal stability are achieved for perovskite quantum dot papers.