Optical Effects of Graphene Electrodes on Organic Light-Emitting Diodes

We performed optical simulations and experiments to investigate the internal optics of graphene anode organic light-emitting diodes (OLEDs). The efficiencies, emission distribution, and spectral characteristics of four-layered graphene anode OLEDs were extracted and compared to those of ITO anode OL...

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Published inIEEE journal of selected topics in quantum electronics Vol. 22; no. 1; pp. 48 - 53
Main Authors Cho, Hyunsu, Shin, Jin-Wook, Cho, Nam Sung, Moon, Jaehyun, Han, Jun-Han, Kwon, Young-Duck, Cho, Seungmin, Lee, Jeong-Ik
Format Journal Article
LanguageEnglish
Published IEEE 01.01.2016
Subjects
Anodes
Electrodes
Emission
Graphene
Indium tin oxide
Microcavities
Optical films
Organic light emitting diodes
Spectral emissivity
Transparent electrode
transparent electrode
Graphene
organic light emitting diodes
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Summary:We performed optical simulations and experiments to investigate the internal optics of graphene anode organic light-emitting diodes (OLEDs). The efficiencies, emission distribution, and spectral characteristics of four-layered graphene anode OLEDs were extracted and compared to those of ITO anode OLEDs. Unlike the case of the ITO anode OLED, the efficiencies and emission distributions of graphene anode OLEDs showed a weak dependency on the thickness of the organic layers. Furthermore, marginal changes in the emission spectra were observed. These results were ascribed to the negligible presence of a microcavity effect in the graphene anode OLED.
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ISSN:1077-260X
1558-4542
DOI:10.1109/JSTQE.2015.2475184