White organic light-emitting diodes combining vacuum deposited blue electrophosphorescent devices with red surface color conversion layers | Zendy

Yongbo Yuan | Zendy; Shuang Li | Zendy; Z. Wang | Zendy; Hongzhang Xu | Zendy; Xiang Zhou | Zendy

Open Access

White organic light-emitting diodes combining vacuum deposited blue electrophosphorescent devices with red surface color conversion layers

Author(s) -

Yongbo Yuan,

Shuang Li,

Z. Wang,

Hongzhang Xu,

Xiang Zhou

Publication year - 2009

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.17.001577

Subject(s) - oled , materials science , iridium , luminous efficacy , chromaticity , optoelectronics , phosphorescence , diode , optics , luminous flux , biphenyl , doping , layer (electronics) , fluorescence , chemistry , physics , nanotechnology , light source , biochemistry , organic chemistry , catalysis

We report white organic light-emitting diodes (WOLEDs) combining vacuum deposited blue electrophosphorescent devices with red surface color conversion layers (CCLs). With an iridium (III) [bis(4,6-di-fluoropheny)- pyridinato-N,C(2')] picolinate (FIrpic) doped 4,4'-bis(9-carbazolyl)-2,2'-dimethyl-biphenyl (CDBP) blue electrophosphorescent light emitting layer, and an appropriate red surface CCL containing 4-(dicyanomethylene)-2-tert-butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB), the WOLED generate high efficiency and very pure white light with a peak luminous (power) efficiency of 18.1 cd/A (9.5 lm/W) and CIE coordinates of (0.32, 0.31), very close to the equal-energy white, respectively. Moreover, the output spectra and CIE coordinates of the WOLED show no significant change at a wide range of current density.

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