title: Bi5FeTi3O15nanofibers/graphene nanocomposites as an effective counter electrode for dye-sensitized solar cells.
abstract: The present study reports Bi5FeTi3O15(BFTO) nanofibers/graphene (Gr) nanocomposites (BGr) as counter electrodes (CEs) in dye-sensitized solar cells (DSSCs). BFTO nanofibers with diameters of 40-100 nm were fabricated by sol-gel based electrospinning technique. The microstructure and surface morphology of the BFTO nanofibers and the BGr nanocomposites were characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The electrochemical performances of BGr CEs were comprehensively characterized and investigated. Compared to pristine BFTO, the nanocomposites have a marked improvement in electrocatalytic performance for the reduction of triiodide because of larger surface area and lower transfer resistance on the electrolyte-electrode interface. The maximum power conversion efficiency has reached 9.56%, which is much larger than that of pure BFTO CEs (0.22%).
authors.affiliation: School of Physics and Electronics, Institute of Microsystem, and Laboratory of Photovoltaic Materials of Henan Province, Henan University, Kaifeng, 475004, China. zhenghaiw@ustc.edu.
authors.forename: H W
authors.initials: HW
authors.lastname: Zheng
authors.affiliation: School of Physics and Electronics, Institute of Microsystem, and Laboratory of Photovoltaic Materials of Henan Province, Henan University, Kaifeng, 475004, China.
authors.forename: X
authors.initials: X
authors.lastname: Liang
authors.affiliation: School of Physics and Electronics, Institute of Microsystem, and Laboratory of Photovoltaic Materials of Henan Province, Henan University, Kaifeng, 475004, China.
authors.forename: Y H
authors.initials: YH
authors.lastname: Yu
authors.affiliation: School of Physics and Electronics, Institute of Microsystem, and Laboratory of Photovoltaic Materials of Henan Province, Henan University, Kaifeng, 475004, China.
authors.forename: K
authors.initials: K
authors.lastname: Wang
authors.affiliation: School of Physics and Electronics, Institute of Microsystem, and Laboratory of Photovoltaic Materials of Henan Province, Henan University, Kaifeng, 475004, China.
authors.forename: X A
authors.initials: XA
authors.lastname: Zhang
authors.affiliation: Department of Electronic Information Engineering, Henan Vocational College of Agriculture, Zhengzhou, 451450, China. mqmen2016@163.com.
authors.forename: B Q
authors.initials: BQ
authors.lastname: Men
authors.affiliation: School of Physics and Electronics, Institute of Microsystem, and Laboratory of Photovoltaic Materials of Henan Province, Henan University, Kaifeng, 475004, China.
authors.forename: C L
authors.initials: CL
authors.lastname: Diao
authors.affiliation: School of Physics and Electronics, Institute of Microsystem, and Laboratory of Photovoltaic Materials of Henan Province, Henan University, Kaifeng, 475004, China.
authors.forename: C X
authors.initials: CX
authors.lastname: Peng
authors.affiliation: School of Physics and Electronics, Institute of Microsystem, and Laboratory of Photovoltaic Materials of Henan Province, Henan University, Kaifeng, 475004, China. yuegentian@126.com.
authors.forename: G T
authors.initials: GT
authors.lastname: Yue
keywords: Bi5FeTi3O15; Counter electrode; Dye-sensitized solar cell; Graphene; Nanocomposites