Highly Efficient and Stable White Light-Emitting Diodes Using Perovskite Quantum Dot Paper
Huang Chen, Sung-Wen
KAUST DepartmentComputer, Electrical, and Mathematical Sciences and Engineering DivisionKing Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia
Physical Sciences and Engineering (PSE) Division
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Permanent link to this recordhttp://hdl.handle.net/10754/659548
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AbstractPerovskite 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: CH3NH3PbBr3 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 K2SiF6: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.
CitationKang, C., Lin, C., Lin, C., Li, T., Huang Chen, S., Tsai, C., … Kuo, H. (2019). Highly Efficient and Stable White Light-Emitting Diodes Using Perovskite Quantum Dot Paper. Advanced Science, 1902230. doi:10.1002/advs.201902230
SponsorsC.-Y.K. and C.-H.L. contributed equally to this work. This publication was financially supported by the Ministry of Science and Technology, Taiwan (MOST) (107-2221-E-009-113-MY3), the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) (OSR-2016-CRG5-3005), the KAUST Solar Center, KAUST Catalysis Center, and KAUST baseline funding. The authors would like to thank Prof. Nakamura Shuji of University of California, Santa Barbara and Dr. Lin Chien-Chung of the Industrial Technology Research Institute, Taiwan for the helpful discussion, and express sincere gratitude to Everlight Electronics for helpful technical support with the LED devices.