The Potential of Graphene as an ITO Replacement in Organic Solar Cells: An Optical Perspective

Author

Wee Shing Koh ; Choon How Gan ; Wee Kee Phua ; Akimov, Yuriy A. ; Ping Bai

Author_Institution

Electron. & Photonics Dept., A*STAR Inst. of High Performance Comput., Singapore, Singapore

Volume

20

Issue

1

fYear

2014

fDate

Jan.-Feb. 2014

Firstpage

36

Lastpage

42

Abstract

Graphene possesses innate potential to replace indium tin oxide (ITO) as the transparent electrode in an organic solar cell device. From our transmittance study weighted with the air mass 1.5 global (AM1.5G) solar spectrum, it is found that a higher transparency may be obtained for up to four layers of graphene in comparison to ITO. Our findings suggest that replacing ITO with monolayer graphene in organic solar cells yields comparable performance. Due to the increased optical absorption, organic solar cells with four-layer graphene (with the same sheet resistance as ITO at 30 Ω/□) are capable of attaining at least 92% of the same organic photovoltaic device with an optimized ITO electrode for both normal and angular AM1.5G illumination.

Keywords

electrodes; graphene; monolayers; solar cells; solar spectra; transparency; C; air mass 1.5 global solar spectrum; monolayer graphene; optical absorption; organic solar cells; sheet resistance; transparent electrode; Absorption; Electrodes; Graphene; Indium tin oxide; Performance evaluation; Photovoltaic cells; Resistance; Computational modeling; organic semiconductors; photovoltaic cells; thin film devices;

fLanguage

English

Journal_Title

Selected Topics in Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

1077-260X

Type

jour

DOI

10.1109/JSTQE.2013.2247976

Filename

6466351