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Proceedings Paper

Device performance and carrier dynamics in blue-mixing host organic light-emitting devices
Author(s): Jiun-Haw Lee; S.W. Liu; Chih-Chung Teng; Jian-Hong Lin; Tian-Chiun Lin; C.C. Yang
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Paper Abstract

In this paper, we study device performance and carrier dynamics of an organic light-emitting device (OLED) with an emitting layer (EML) based on a mixed-host (MH) structure. Such a structure is composed of two different host and one dopant materials. It exhibits longer operation lifetime as compared with a conventional heterojunction (HJ) device. In such a MH layer structure, carrier transport characteristic is modified and emission zone position is changed. Energy transfer from the two hosts to one dopant is studied by EL, PL and TRPL measurements. We observe spectrum shift from the EL measurement under different current injection. Incompletely energy transfer from NPB to DPAVBi is shown in cw PL measurement. Time constant at different probe wavelengths with different mixing concentration suggests that different energy transfer in such a MH structure.

Paper Details

Date Published: 12 January 2005
PDF: 6 pages
Proc. SPIE 5632, Light-Emitting Diode Materials and Devices, (12 January 2005); doi: 10.1117/12.576504
Show Author Affiliations
Jiun-Haw Lee, National Taiwan Univ. (Taiwan)
S.W. Liu, Academia Sinica (Taiwan)
Chih-Chung Teng, National Taiwan Univ. (Taiwan)
Jian-Hong Lin, National Taiwan Univ. (Taiwan)
Tian-Chiun Lin, National Taiwan Univ. (Taiwan)
C.C. Yang, National Taiwan Univ. (Taiwan)

Published in SPIE Proceedings Vol. 5632:
Light-Emitting Diode Materials and Devices
Gang Yu; Chuangtian Chen; Changhee Lee, Editor(s)

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