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Proceedings Paper

Efficient simple structure phosphorescent organic light emitting devices with narrow band gap fluorescent hosts
Author(s): Tae Jin Park; Woo Sik Jeon; Jang Hyuk Kwon
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Paper Abstract

We present highly efficient red and green phosphorescent devices comprising only two organic layers. Novel host materials having good electron transporting and new narrow band-gap fluorescent characteristics lead to the fabrication of simplified high efficiency devices. The driving voltage value of 3.3 V to reach luminance of 1000 cd/m2 is reported in simple bi-layer red and green phosphorescent OLEDs, respectively. The maximum current- and power-efficiency values of 38.30 cd/A and 46.60 lm/W are demonstrated in this green device. The current and power efficiencies of bi-layered red PHOLED are 9.38 cd/A and 11.72 lm/W. Results reveal a practical way to fabricate highly efficient truly bi-layer organic devices for trouble-free manufacturing processes.

Paper Details

Date Published: 2 September 2008
PDF: 8 pages
Proc. SPIE 7051, Organic Light Emitting Materials and Devices XII, 70510R (2 September 2008); doi: 10.1117/12.795645
Show Author Affiliations
Tae Jin Park, Kyung Hee Univ. (Korea, Republic of)
Woo Sik Jeon, Kyung Hee Univ. (Korea, Republic of)
Jang Hyuk Kwon, Kyung Hee Univ. (Korea, Republic of)


Published in SPIE Proceedings Vol. 7051:
Organic Light Emitting Materials and Devices XII
Franky So; Chihaya Adachi, Editor(s)

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