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Proceedings Paper

Role of carrier mobility, exciton diffusion, and their interplay for charge balance and improved properties of organic electrophosphorescent device
Author(s): Byung Doo Chin; Soo-Hyeong Lee; Jai Kyeong Kim; Chang Hee Lee
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Paper Abstract

In this paper, we demonstrated that controlled charge trapping, both at the emission layer and charge transport layer with energy level alignment, is essential for charge-balanced and effective electrophosphorescent organic light-emitting device (OLED). Conditions for enhanced of efficiency and lifetime of OLED were obtained with graded doping profile at the light-emission layers (varied host-dopant concentration) and different hole (exciton) blocking materials. Conceptual device physics presented in this study can be applied at an initial design of charge-confined, balanced structure of highly efficient electrophosphorescent devices.

Paper Details

Date Published: 5 December 2006
PDF: 9 pages
Proc. SPIE 6333, Organic Light Emitting Materials and Devices X, 633315 (5 December 2006); doi: 10.1117/12.680411
Show Author Affiliations
Byung Doo Chin, Korea Institute of Science and Technology (South Korea)
Soo-Hyeong Lee, Chonbuk National Univ. (South Korea)
Jai Kyeong Kim, Korea Institute of Science and Technology (South Korea)
Chang Hee Lee, Seoul National Univ. (South Korea)

Published in SPIE Proceedings Vol. 6333:
Organic Light Emitting Materials and Devices X
Zakya H. Kafafi; Franky So, Editor(s)

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