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Temperature and emitting area dependence of red organic light‐emitting diode performance
Author(s) -
Yang Lianqiao,
Chen Wei,
Wei Bin,
Zhang Jianhua
Publication year - 2014
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201330437
Subject(s) - oled , materials science , optoelectronics , current (fluid) , diode , voltage , current density , nanotechnology , electrical engineering , physics , engineering , layer (electronics) , quantum mechanics
In this paper, the effects of sample size, forward current, and temperature on the performance of organic light‐emitting diodes (OLEDs) are discussed. It is found that the efficiency is inversely proportional to the sample size and current density due to the current spreading effect and limited carrier mobility of the organic material. The results demonstrate that both forward voltage and luminescent efficiency of all samples are functions of temperature. The voltage of devices decreases monotonously with temperature, while the efficiency shows the reverse trend. Carrier mobility, current injection efficiency, and the trap‐recovery effect are regarded to be responsible for the temperature dependency.