A highly robust and stable graphene-encapsulated Cu-grid hybrid transparent electrode demonstrating superior performance in organic solar cells
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- A highly robust and stable graphene-encapsulated Cu-grid hybrid transparent electrode demonstrating superior performance in organic solar cells
- Jeong, Gyujeong; Jung, Seungon; Choi, Yunseong; Lee, Junghyun; Seo, Jihyung; Kim, Dong Suk; Park, Hyesung
- Issue Date
- ROYAL SOC CHEMISTRY
- JOURNAL OF MATERIALS CHEMISTRY A, v.6, no.48, pp.24805 - 24813
- Copper is one of the candidate materials for alternative transparent conductive electrodes (TCEs) owing to its excellent electrical conductivity and low cost. The vulnerability of copper against oxidation, however, imposes a severe limitation on its widespread application in functional devices. In this study, we demonstrate a high-performance and robust Cu and graphene hybrid TCE, where Cu optimized in a grid structure was used as the base electrode, while graphene sheet provided additional charge collection and transport pathways as well as a protective layer against oxidation of the underlying Cu. The Cu grid/graphene hybrid TCE was demonstrated in organic solar cells (OSCs) to have a power conversion efficiency of 8.5%, which is among the best performances based on metal grid TCE-based OSCs. The resulting device exhibited excellent long-term and thermal stabilities as well. The proposed Cu grid/graphene hybrid structure is expected to find practical application in various optoelectronics devices.
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