Energy Transfer Employing Europium Complex and Blue Phosphorescent Dye and Its Application in White Organic Light-Emitting Diodes
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概要
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We investigated the energy transfer of a blue phosphorescent molecule, bis[(4,6-difluorophenyl)-pyridinato-N,C2$'$] (picolinate) iridium(III) (FIrpic), and a red europium complex of tris(dibenzoylmethane)-mono(4,7-dimethyphenanthroline) europium(III) [Eu(dbm)3phen] doped in poly(N-vinylcarbazole) (PVK). The photoluminescence (PL) spectral intensity of a PVK:Eu(dbm)3phen film was increased by FIrpic doping. Additionally, we demonstrated white organic light-emitting devices (OLEDs) employing the energy transfer from a host to dopants, showing the Commission Internationale de L’Eclairage (CIE) coordinates of $(0.31, 0.38)$ at a current density of 0.5 mA/cm2. The advantage of using Eu complexes as red dopants is that it is easy to control the doping ratio and obtain a white emission because of their high triplet level.
- 2007-04-30
著者
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Hino Yuichi
Osaka University Center For Advanced Science And Innovation (casi)
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Kajii Hirotake
Osaka Univ. Suita‐shi Jpn
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Ohmori Yutaka
Osaka Univ. Suita‐shi Jpn
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Ohmori Yutaka
Osaka University, Center for Advanced Science and Innovation, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
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Hino Yuichi
Osaka University, Center for Advanced Science and Innovation, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
関連論文
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