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Proceedings Paper

Highly efficient organic light emitting devices with combination of fluorescent and phosphorescent materials for color tunable diode fabricated by all-wet process
Author(s): Yutaka Ohmori; Yuichi Hino; Hirotake Kajii
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Paper Abstract

Efficient polymer based organic light emitting devices (PLEDs) are fabricated by spin coating method. The emitting layer consists of polymer host and phosphor dopant. The energy transfer and charge carrier trapping of poly(9,9-dioctylfluorene) (PFO)-based PLEDs doped with red emissive phosphor tris(1-phenylisoquinoline) iridium (III) [Ir(piq)3] by applying the voltage pulse on devices has been discussed. The emission from the host has been observed under a short pulse of 100 ns was applied. In order to change the electroluminescent (EL) spectrum, PFO-based white-light-emitting PLEDs have been demonstrated utilizing the different pulse width and frequency. The maximum luminance of 4,800 cd/m2 and the Commission Internationale de L'Eclairage (CIE) coordinates of the ideal white light (0.33, 0.35) at the pulse width and frequency of 100 ns and 1 kHz, respectively, were obtained.

Paper Details

Date Published: 7 July 2005
PDF: 8 pages
Proc. SPIE 5840, Photonic Materials, Devices, and Applications, (7 July 2005); doi: 10.1117/12.608578
Show Author Affiliations
Yutaka Ohmori, Osaka Univ. (Japan)
Yuichi Hino, Osaka Univ. (Japan)
Hirotake Kajii, Osaka Univ. (Japan)

Published in SPIE Proceedings Vol. 5840:
Photonic Materials, Devices, and Applications
Goncal Badenes; Derek Abbott; Ali Serpenguzel, Editor(s)

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