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High efficiency and ultra‐wide color gamut quantum dot LEDs for next generation displays
Author(s) -
Manders Jesse R.,
Qian Lei,
Titov Alexandre,
Hyvonen Jake,
TokarzScott Jean,
Acharya Krishna P.,
Yang Yixing,
Cao Weiran,
Zheng Ying,
Xue Jiangeng,
Holloway Paul H.
Publication year - 2015
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1002/jsid.393
Subject(s) - gamut , ntsc , optoelectronics , light emitting diode , quantum dot , quantum efficiency , rgb color model , diode , optics , materials science , color space , computer science , physics , telecommunications , high definition television , computer vision , image (mathematics)
Colloidal quantum dot‐based hybrid light‐emitting diodes (QLEDs) have been demonstrated that exhibit quantum efficiencies (EQEs) >10% for all three fundamental colors red, green, and blue (21% EQE, 82 cd/A for green). This is the first report of a green QLED with EQE >20% and current efficiency >80 cd/A. The devices have the longest lifetimes reported in the literature (280k hrs) and extremely well‐tuned color fidelity. The narrow QLED emission spectra (full width at half maximum < 30 nm) and well‐controlled peak wavelengths generate a color gamut covering >170% of the National Television System Committee (NTSC) 1987 color space and ~90% of the Rec. 2020 color space. This color gamut is larger than that of OLED televisions in mass production and is the largest of all QLEDs reported. Additionally, these devices are completely fabricated using solution‐processing techniques. The extremely desirable properties of high efficiency, color tunability/fidelity, long lifetime, and low cost processing from solutions make QLED technology disruptive and will lead to next generation displays.