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Evolution of luminance by voltage in organic light-emitting diodes

Title
Evolution of luminance by voltage in organic light-emitting diodes
Authors
Weon, BMKim, SYLee, JLJe, JH
POSTECH Authors
Lee, JLJe, JH
Date Issued
Jan-2006
Publisher
AMER INST PHYSICS
Abstract
We study degradation behaviors of luminance and voltage in organic light-emitting diodes. We find that normalized luminance and inverse normalized voltage with time, L(t) and V(t)(-1), follow the stretched exponential decay. On this basis, we derive a general relation of luminance and voltage with time as L(t) = V(t)(-delta(t)), where delta(t) indicates a decay exponent, which is attributed to time-dependent space-charge limitation. Here the observation of higher delta(t) at higher initial luminance explains why luminance decay is faster at higher initial luminance. (c) 2006 American Institute of Physics.
URI
http://oasis.postech.ac.kr/handle/2014.oak/24250
DOI
10.1063/1.2159563
ISSN
0003-6951
Article Type
Article
Citation
APPLIED PHYSICS LETTERS, vol. 88, no. 1, 2006-01
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이종람LEE, JONG LAM
Dept of Materials Science & Enginrg
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