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Proceedings Paper

White OLED devices and processes for lighting applications
Author(s): Nobuhiro Ide; Hiroya Tsuji; Norihiro Ito; Yuko Matsuhisa; Shingo Houzumi; Taisuke Nishimori
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Paper Abstract

In these days, the basic performances of white OLEDs are dramatically improved and application of OLEDs to "Lighting" is expected to be true in the near future. We have developed various technologies for OLED lighting with the aid of the Japanese governmental project, "High-efficiency lighting based on the organic light-emitting mechanism." In this project, a white OLED with high efficiency (37 lm/W) and high quality emission characteristics (CRI of 95 with a small variation of chromaticity in different directions and chromaticity just on the black-body radiation curve) applicable to "Lighting" was realized by a two-unit structure with a fluorescent deep blue emissive unit and a phosphorescent green and red emissive unit. Half-decay lifetime of this white OLED at 1,000 cd/m2 was over 40,000 h. A heat radiative, thin encapsulation structure (less than 1 mm) realized a very stable emission at high luminance of over 3,000 cd/m2. A new deposition source with a hot-wall and a rate controllable valve was developed. Thickness uniformity within +/- 3% at high deposition rate of over 8 nm/s, high material utilization of over 70 %, and repeatable deposition rate controllability were confirmed.

Paper Details

Date Published: 18 May 2010
PDF: 8 pages
Proc. SPIE 7722, Organic Photonics IV, 772202 (18 May 2010); doi: 10.1117/12.854314
Show Author Affiliations
Nobuhiro Ide, Panasonic Electric Works Co., Ltd. (Japan)
Hiroya Tsuji, Panasonic Electric Works Co., Ltd. (Japan)
Norihiro Ito, Panasonic Electric Works Co., Ltd. (Japan)
Yuko Matsuhisa, Panasonic Electric Works Co., Ltd. (Japan)
Shingo Houzumi, Panasonic Electric Works Co., Ltd. (Japan)
Taisuke Nishimori, Panasonic Electric Works Co., Ltd. (Japan)

Published in SPIE Proceedings Vol. 7722:
Organic Photonics IV
Paul L. Heremans; Reinder Coehoorn; Chihaya Adachi, Editor(s)

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