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White‐Light Sources: Solution‐Processed White Phosphorescent Tandem Organic Light‐Emitting Devices (Adv. Mater. 32/2015)
Author(s) -
Chiba Takayuki,
Pu YongJin,
Kido Junji
Publication year - 2015
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.201570217
Subject(s) - phosphorescence , materials science , tandem , oled , white light , phosphorescent organic light emitting diode , optoelectronics , polymer , quantum efficiency , nanotechnology , optics , fluorescence , composite material , physics , layer (electronics)
On page 4681, Y.‐J. Pu, J. Kido, and T. Chiba describe solution processed white‐phosphorescent tandem organic light‐emitting devices (OLEDs) comprising two light‐emitting units (LEUs) with small‐molecule phosphorescent emitters, small‐molecule host materials, and a polymer material as a binder improving the insolubility of the LEU films. These devices exhibit extremely high efficiencies with a current efficiency of 61 cd A −1 and an external quantum efficiency of 28% at 5000 cd m −2 .