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    High performance dye-sensitized solar cells using graphene modified fluorine-doped tin oxide glass by Langmuir-Blodgett technique

    Year: 2015

    Journal: JOURNAL OF SOLID STATE CHEMISTRY, Vol. 224, p 71-75, 20170208

    Authors: Roh, Ki-Min; Jo, Eun-Hee; Chang, Hankwon; Han, Tae Hee; Jang, Hee Dong

    Organizations: Korea Inst Geosci & Mineral Resources, Rare Met Res Ctr, Taejon 305350, South Korea; Univ Sci & Technol, Taejon 305350, South Korea; Hanyang Univ, Dept Organ & Nano Engn, Seoul 133791, South Korea

    Since the introduction of dye-sensitized solar cells (DSSCs) with low fabrication cost and high power conversion efficiency, extensive studies have been carried out to improve the charge transfer rate and performance of DSSCs. In this paper, we present DSSCs that use surface modified fluorine-doped tin oxide (PTO) substrates with reduced graphene oxide (r-GO) sheets prepared using the Langmuir-Blodgett (LB) technique to decrease the charge recombination at the TiO2/FTO interface. R-GO sheets were excellently attached on FTO surface without physical deformations such as wrinkles; effects of the surface coverage of r-GO on the DSSC performance were also investigated. By using graphene modified FTO substrates, the resistance at the interface of TiO2/FTO was reduced and the power conversion efficiency was increased to 8.44%. (C) 2014 Elsevier Inc. All rights reserved.