title: A highly efficient flexible dye-sensitized solar cell based on nickel sulfide/platinum/titanium counter electrode.
abstract: A composite film of nickel sulfide/platinum/titanium foil (NiS/Pt/Ti) with low cost and high electrocatalytic activity was synthesized by the use of an in situ electropolymerization route and proposed as a counter electrode (CE) catalyst for flexible dye-sensitized solar cells (FDSSCs). The FDSSC with the NiS/Pt/Ti CE exhibited a comparable power conversion efficiency of 7.20% to the FDSSC with the platinum/titanium (Pt/Ti) CE showing 6.07%. The surface morphology of the NiS/Pt/Ti CE with one-dimensional (1D) structure is characterized by using the scanning electron microscopy (SEM). The NiS/Pt/Ti CE also displayed multiple electrochemical functions of excellent conductivity, great electrocatalytic ability for iodine/triiodine, and low charge transfer resistance of 2.61 ± 0.02 Ω cm(2), which were characterized by using the cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and Tafel polarization plots. The photocurrent-photovoltage (J-V) character curves were further used to calculate the theoretical optical light performance parameters of the FDSSCs. It may be said that the NiS/Pt/Ti counter electrode is a promising catalytic material to replace the expensive platinum in FDSSCs.
authors.affiliation: Key Laboratory of Photovoltaic Materials of Henan, School of Physics and Electronics, Henan University, Kaifeng, 475004 China.
authors.forename: Gentian
authors.initials: G
authors.lastname: Yue
authors.affiliation: Key Laboratory of Photovoltaic Materials of Henan, School of Physics and Electronics, Henan University, Kaifeng, 475004 China.
authors.forename: Xingping
authors.initials: X
authors.lastname: Ma
authors.affiliation: Key Laboratory of Photovoltaic Materials of Henan, School of Physics and Electronics, Henan University, Kaifeng, 475004 China.
authors.forename: Weifeng
authors.initials: W
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Photovoltaic Materials of Henan, School of Physics and Electronics, Henan University, Kaifeng, 475004 China.
authors.forename: Fumin
authors.initials: F
authors.lastname: Li
authors.affiliation: Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Institute of Materials Physical Chemistry, Huaqiao University, Quanzhou, 362021 China.
authors.forename: Jihuai
authors.initials: J
authors.lastname: Wu
authors.affiliation: Key Laboratory of Photovoltaic Materials of Henan, School of Physics and Electronics, Henan University, Kaifeng, 475004 China.
authors.forename: Guoqiang
authors.initials: G
authors.lastname: Li
keywords: Counter electrode; Dye-sensitized solar cell; Flexible; Nickel sulfide; Platinum