Tuning of a graphene-electrode work function to enhance the efficiency of organic bulk heterojunction photovoltaic cells with an inverted structure

Gunho Jo, Seok In Na, Seung Hwan Oh, Sangchul Lee, Tae Soo Kim, Gunuk Wang, Minhyeok Choe, Woojin Park, Jongwon Yoon, Dong Yu Kim, Yung Ho Kahng, Takhee Lee

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Abstract

We demonstrate the fabrication of inverted-structure organic solar cells (OSCs) with graphene cathodes. The graphene film used in this work was work-function-engineered with an interfacial dipole layer to reduce the work function of graphene, which resulted in an increase in the built-in potential and enhancement of the charge extraction, thereby enhancing the overall device performance. Our demonstration of inverted-structure OSCs with work-function-engineering of graphene electrodes will foster the fabrication of more advanced structure OSCs with higher efficiency.

Original languageEnglish
Article number213301
JournalApplied Physics Letters
Volume97
Issue number21
DOIs
Publication statusPublished - 2010 Nov 22
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Jo, G., Na, S. I., Oh, S. H., Lee, S., Kim, T. S., Wang, G., Choe, M., Park, W., Yoon, J., Kim, D. Y., Kahng, Y. H., & Lee, T. (2010). Tuning of a graphene-electrode work function to enhance the efficiency of organic bulk heterojunction photovoltaic cells with an inverted structure. Applied Physics Letters, 97(21), [213301]. https://doi.org/10.1063/1.3514551