Technology ready use of single layer graphene as a transparent electrode for hybrid photovoltaic devices

Zhibing Wang, Conor P. Puls, Neal E. Staley, Yu Zhang, Aaron Todd, Jian Xu, Casey A. Howsare, Matthew J. Hollander, Joshua A. Robinson, Ying Liu

Research output: Contribution to journalArticle

30 Scopus citations

Abstract

Graphene has been used recently as a replacement for indium tin oxide (ITO) for the transparent electrode of an organic photovoltaic device. Due to its limited supply, ITO is considered as a limiting factor for the commercialization of organic solar cells. We explored the use of large-area graphene grown on copper by chemical vapor deposition (CVD) and then transferred to a glass substrate as an alternative transparent electrode. The transferred film was shown by scanning Raman spectroscopy measurements to consist of >90% single layer graphene. Optical spectroscopy measurements showed that the layer-transferred graphene has an optical absorbance of 1.23% at a wavelength of 532 nm. We fabricated organic hybrid solar cells utilizing this material as an electrode and compared their performance with those of ITO devices fabricated using the same procedure. We demonstrated power conversion efficiency up to 3.98%, higher than that of the ITO device (3.86%), showing that layer-transferred graphene promises to be a high quality, low-cost, flexible material for transparent electrodes in solar cell technology.

Original languageEnglish (US)
Pages (from-to)521-524
Number of pages4
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume44
Issue number2
DOIs
StatePublished - Nov 1 2011

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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