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Quantum‐Dot Light‐Emitting Diodes for Large‐Area Displays: Towards the Dawn of Commercialization
Author(s) -
Dai Xingliang,
Deng Yunzhou,
Peng Xiaogang,
Jin Yizheng
Publication year - 2017
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201607022
Subject(s) - quantum dot , gamut , materials science , optoelectronics , electroluminescence , diode , light emitting diode , active matrix , quantum efficiency , engineering physics , nanotechnology , optics , physics , layer (electronics) , thin film transistor
Quantum dots are a unique class of emitters with size‐tunable emission wavelengths, saturated emission colors, near‐unity luminance efficiency, inherent photo‐ and thermal‐ stability and excellent solution processability. Quantum dots have been used as down‐converters for back‐lighting in liquid‐crystal displays to improve color gamut, leading to the booming of quantum‐dot televisions in consumer market. In the past few years, efficiency and lifetime of electroluminescence devices based on quantum dots achieved tremendous progress. These encouraging facts foreshadow the commercialization of quantum‐dot light‐emitting diodes (QLEDs), which promises an unprecedented generation of cost‐effective, large‐area, energy‐saving, wide‐color‐gamut, ultra‐thin and flexible displays. Here we provide a Progress Report, covering interdisciplinary aspects including material chemistry of quantum dots and charge‐transporting layers, optimization and mechanism studies of prototype devices and processing techniques to produce large‐area and high‐resolution red‐green‐blue pixel arrays. We also identify a few key challenges facing the development of active‐matrix QLED displays.