title: Enhanced photovoltaic performance of a dye-sensitized solar cell using graphene-TiO2 photoanode prepared by a novel in situ simultaneous reduction-hydrolysis technique.
abstract: Enhanced photovoltaic performance of a DSSC using graphene-TiO2 photoelectrodes prepared by our recent in situ simultaneous reduction-hydrolysis technique (Adv. Funct. Mater., 2012, DOI: 10.1002/adfm.201202349, in press) was achieved. The DSSCs based on the G-TiO2 nanocomposites improved their overall energy conversion efficiency to 7.1%. The results prove that the promoting effect of graphene is strongly dependent on its content; namely, the efficiency of DSSCs increases and then decreases with increasing graphene content in TiO2-graphene composites. Excessive graphene in the nanocomposite leads to a decrease of the light harvest of dye molecules and thus a negative effect on the power conversion efficiency of DSSCs.
authors.affiliation: National Laboratory of Solid State Microstructures, Eco-Materials and Renewable Energy Research Center (ERERC), Nanjing University, Nanjing 210093, PR China.
authors.forename: Liang
authors.initials: L
authors.lastname: Chen
authors.forename: Yong
authors.initials: Y
authors.lastname: Zhou
authors.forename: Wenguang
authors.initials: W
authors.lastname: Tu
authors.forename: Zhengdao
authors.initials: Z
authors.lastname: Li
authors.forename: Chunxiong
authors.initials: C
authors.lastname: Bao
authors.forename: Hui
authors.initials: H
authors.lastname: Dai
authors.forename: Tao
authors.initials: T
authors.lastname: Yu
authors.forename: Jianguo
authors.initials: J
authors.lastname: Liu
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Zou