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Mesoporous Silica Particles Integrated with All‐Inorganic CsPbBr 3 Perovskite Quantum‐Dot Nanocomposites (MP‐PQDs) with High Stability and Wide Color Gamut Used for Backlight Display
Author(s) -
Wang HungChia,
Lin ShinYing,
Tang AnCih,
Singh Bheeshma Pratap,
Tong HungChun,
Chen ChingYi,
Lee YuChun,
Tsai TzongLiang,
Liu RuShi
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201603698
Subject(s) - materials science , quantum dot , backlight , perovskite (structure) , optoelectronics , light emitting diode , thermal stability , nanocomposite , mesoporous material , nanocrystal , nanotechnology , chemistry , liquid crystal display , biochemistry , catalysis , organic chemistry , crystallography
All‐inorganic CsPbX 3 (X=I, Br, Cl) perovskite quantum dots (PQDs) have been investigated because of their optical properties, such as tunable wavelength, narrow band, and high quantum efficiency. These features have been used in light emitting diode (LED) devices. LED on‐chip fabrication uses mixed green and red quantum dots with silicone gel. However, the ion‐exchange effect widens the narrow emission spectrum. Quantum dots cannot be mixed because of anion exchange. We address this issue with a mesoporous PQD nanocomposite that can prevent ion exchange and increase stability. We mixed green quantum‐dot‐containing mesoporous silica nanocomposites with red PQDs, which can prevent the anion‐exchange effect and increase thermal and photo stability. We applied the new PQD‐based LEDs for backlight displays. We also used PQDs in an on‐chip LED device. Our white LED device for backlight display passed through a color filter with an NTSC value of 113 % and Rec. 2020 of 85 %.