Identification of a multi-stack structure of graphene electrodes doped layer-by-layer with benzimidazole and its implication for the design of optoelectronic devices

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Optical properties of benzimidazole (BI)-doped layer-by-layer graphene differ significantly from those of intrinsic graphene. Our study based on transmission electron microscopy and X-ray photoelectron spectroscopy depth profiling reveals that such a difference stems from its peculiar stratified geometry formed in situ during the doping process. This work presents an effective thickness and optical constants that can treat these multi-stacked BI-doped graphene electrodes as a single equivalent medium. For verification, the efficiency and angular emission spectra of organic light-emitting diodes with the BI-doped graphene electrode are modeled with the proposed method, and we demonstrate that the calculation matches experimental results in a much narrower margin than that based on the optical properties of undoped graphene. © 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Publisher
OPTICAL SOC AMER
Issue Date
2021-07
Language
English
Article Type
Article
Citation

OPTICS EXPRESS, v.29, no.15, pp.23131 - 23141

ISSN
1094-4087
DOI
10.1364/OE.430149
URI
http://hdl.handle.net/10203/290998
Appears in Collection
EE-Journal Papers(저널논문)
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