Bright and ultimately pure red electrophosphorescent diode bearing diphenylquinoxaline
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TLDR
The ultimately pure red OLED using new electrophosphorescent compound, bis(2,3-diphenylquinoxaline)iridium(acetylace-tonate) [(QH)2 Ir(acac]], which is the closest to the ultimate limit of pure red among reported OLEDs, was attained and maintained even in luminance brighter than 600cd/m2.Abstract:
The ultimately pure red OLED using new electrophosphorescent compound, bis(2,3-diphenylquinoxaline)iridium(acetylace-tonate) [(QH)2 Ir(acac)] is described. Electrophosphorescence peak wavelength and bandwidth were advanced for the purest red color stimulus to 680nm with full width at half maximum of 89nm by doping (QH)2 Ir(acac) into a light emitting electron transport layer composed of 3-(4-biphenylyl)-4-phenyl-5-(4-tert-butylphenyl)-1,2,4-triazole. The most vivid red electrophosphorescence with CIE chromaticity coordinates better than x=0.70 and y=0.28, which are the closest to the ultimate limit of pure red among reported OLEDs, was attained and maintained even in luminance brighter than 600cd/m2. A very high maximum external electrophosphorescent quantum efficiency of 10.2% was also realized.read more
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TL;DR: In this article, the authors demonstrate high-efficiency red electrophosphorescent organic light-emitting devices employing bis(2′-benzo[4,5-a]thienyl)pyridinato-N,C3′) iridium(acetylacetonate) [Btp2Ir(acac)] as a red phosphor.
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High-efficiency and low-voltage p‐i‐n electrophosphorescent organic light-emitting diodes with double-emission layers
Gufeng He,Martin Pfeiffer,Karl Leo,Michael Hofmann,Jan Birnstock,Robert Pudzich,Josef Salbeck +6 more
TL;DR: In this article, a double-emission layer (D-EML) was incorporated into p-i-n-type cell architecture to achieve high-efficiency organic light-emitting diodes.