title: Decatungstate acid improves the photo-induced electron lifetime and retards the recombination in dye sensitized solar cells.
abstract: Decatungstate acid (DA) was utilized to modify TiO2 in the photoanode of dye sensitized solar cells. The photo-induced electron lifetime was evidently improved and the recombination was greatly inhibited. DA can introduce levels of impurities and lower the Fermi level through a doping effect and thus increase the photocurrent. Moreover, the improved charge carrier density can be found through external electric field surface photovoltage and Mott-Schottky plots. A 22.94% enhancement in photocurrent was achieved with little degradation in photovoltage, leading to a 10.28% increase in optic-to-electric power conversion efficiency.
authors.affiliation: MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China. ylyang@hit.edu.cn fanruiqing@hit.edu.cn.
authors.forename: Liang
authors.initials: L
authors.lastname: Li
authors.forename: Yulin
authors.initials: Y
authors.lastname: Yang
authors.forename: Ruiqing
authors.initials: R
authors.lastname: Fan
authors.forename: Jian
authors.initials: J
authors.lastname: Liu
authors.forename: Yanxia
authors.initials: Y
authors.lastname: Jiang
authors.forename: Bin
authors.initials: B
authors.lastname: Yang
authors.forename: Wenwu
authors.initials: W
authors.lastname: Cao