Open AccessHighly Efficient and Stable White Light‐Emitting Diodes Using Perovskite Quantum Dot Paper
Author(s) -
Kang ChiehYu,
Lin ChunHo,
Lin ChihHao,
Li TingYou,
Huang Chen SungWen,
Tsai ChunLin,
Sher ChinWei,
Wu TingZhu,
Lee PoTsung,
Xu Xuezhu,
Zhang Maolin,
Ho ChihHsiang,
He JrHau,
Kuo HaoChung
Publication year - 2019
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.201902230
Subject(s) - optoelectronics , materials science , quantum dot , luminous efficacy , gamut , photoluminescence , light emitting diode , perovskite (structure) , diode , phosphor , quantum yield , nanocrystal , nanotechnology , optics , fluorescence , chemistry , layer (electronics) , physics , crystallography
Abstract Perovskite quantum dots (PQDs) are a competitive candidate for next‐generation display technologies as a result of their superior photoluminescence, narrow emission, high quantum yield, and color tunability. However, due to poor thermal resistance and instability under high energy radiation, most PQD‐based white light‐emitting diodes (LEDs) show only modest luminous efficiency of ≈50 lm W −1 and a short lifetime of <100 h. In this study, by incorporating cellulose nanocrystals, a new type of QD film is fabricated: CH 3 NH 3 PbBr 3 PQD paper that features 91% optical absorption, intense green light emission (518 nm), and excellent stability attributed to the complexation effect between the nanocellulose and PQDs. The PQD paper is combined with red K 2 SiF 6 :Mn4 + phosphor and blue GaN LED chips to fabricate a high‐performance white LED demonstrating ultrahigh luminous efficiency (124 lm W −1 ), wide color gamut (123% of National Television System Committee), and long operation lifetime (240 h), which paves the way for advanced lighting technology.