title: Effects of potential shift and efficiency of charge collection on nanotube-based porphyrin-sensitized solar cells with conjugated links of varied length.
abstract: For dye-sensitized solar-cell devices fabricated from porphyrin sensitizers with links of varied length (PE1-PE4) adsorbed on anodic titanium-oxide nanotube arrays, we measured induced photocurrent and photovoltage decays under constant bias illumination; the evaluated efficiencies of charge collection of the devices show a systematic trend PE4 > PE3 > PE2 > PE1 at a large short-circuit current, implying that a long link would improve the charge separation if the electrons were effectively injected into the semiconductor.
authors.affiliation: Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, Hsinchu, Taiwan.
authors.forename: Liyang
authors.initials: L
authors.lastname: Luo
authors.forename: Chia-Jung
authors.initials: CJ
authors.lastname: Lin
authors.forename: Chen-Shiung
authors.initials: CS
authors.lastname: Hung
authors.forename: Chen-Fu
authors.initials: CF
authors.lastname: Lo
authors.forename: Ching-Yao
authors.initials: CY
authors.lastname: Lin
authors.forename: Eric Wei-Guang
authors.initials: EW
authors.lastname: Diau