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학술지 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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저자
조현수, 송진욱, 신진욱, 문제현, 권병화, 이정익, 유승협, 조남성
발행일
202107
출처
Optics Express, v.29 no.15, pp.23131-23141
ISSN
1094-4087
출판사
Optical Society of America (OSA)
DOI
https://dx.doi.org/10.1364/OE.430149
협약과제
21ZB1200, ICT 소재·부품·장비 자립기술 및 도전기술 개발, 황치선
초록
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.
KSP 제안 키워드
Bi-doped, Depth profiling(DP), Doping process, Effective thickness, Equivalent medium, Layer-by-Layer(LbL), Multi-stack, Organic light-emitting diodes(OLEDS), Stack structure, Transmission Electron Microscopy(TEM), X-ray Photoelectron Spectroscopy