title: A novel photoanode architecture of dye-sensitized solar cells based on TiO2 hollow sphere/nanorod array double-layer film.
abstract: A novel TiO(2) double-layer (DL) film consisting of TiO(2) hollow spheres (HSs) as overlayer and single-crystalline TiO(2) nanorod arrays (RAs) as underlayer was designed as the photoanode of dye-sensitized solar cells (DSSCs). This new-typed TiO(2) HS/RA DL film could significantly improve the efficiency of DSSCs owing to its synergic effects, i.e. the relatively large specific surface area of TiO(2) HSs for effective dye adsorption, enhanced light harvesting capability originated from TiO(2) RA film, and rapid interfacial electron transport in one-dimensional TiO(2) nanorod arrays. The overall energy-conversion efficiency of 4.57% was achieved by the formation of TiO(2) DL film, which is 16% higher than that formed by TiO(2) HS film and far larger than that formed by TiO(2) RA film (η=0.99%). The light absorption and interfacial electron transport, which play important roles in the efficiency of DSSCs, were investigated by UV-vis absorption spectra and electrochemical impedance spectra.
authors.affiliation: Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Faculty of Materials Science and Engineering, Hubei University, Wuhan 430062, PR China.
authors.forename: Guotian
authors.initials: G
authors.lastname: Dai
authors.forename: Li
authors.initials: L
authors.lastname: Zhao
authors.forename: Jing
authors.initials: J
authors.lastname: Li
authors.forename: Li
authors.initials: L
authors.lastname: Wan
authors.forename: Fan
authors.initials: F
authors.lastname: Hu
authors.forename: Zuxun
authors.initials: Z
authors.lastname: Xu
authors.forename: Binghai
authors.initials: B
authors.lastname: Dong
authors.forename: Hongbing
authors.initials: H
authors.lastname: Lu
authors.forename: Shimin
authors.initials: S
authors.lastname: Wang
authors.forename: Jiaguo
authors.initials: J
authors.lastname: Yu