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Journal Article
Identification of a Multi-stack Structure of Graphene Electrodes Doped Layer-by-layer with Benzimidazole and Its Implication for the Design of Optoelectronic Devices
- Authors
- Hyunsu Cho, Jinouk Song, Jin-Wook Shin, Jaehyun Moon, Byoung-Hwa Kwon, Jeong-Ik Lee, Seunghyup Yoo, Nam Sung Cho
- Issue Date
- 2021-07
- Citation
- Optics Express, v.29, no.15, pp.23131-23141
- ISSN
- 1094-4087
- Publisher
- Optical Society of America (OSA)
- Language
- English
- Type
- Journal Article
- Abstract
- 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 Keywords
- Bi-doped, Depth profiling(DP), Doping process, Effective thickness, Electron Microscopy(TEM and SEM), Equivalent medium, Light-emitting diodes(LED5), Multi-stack, Optical constants, Organic light-emitting diodes(OLED), Stack structure
- © 2021 Optical Society of America. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.