Open AccessResearch on the electron transport and back-reaction kinetics in TiO2 films applied in dye-sensitized solar cells
Author(s) -
Liang Lin-Yun,
Songyuan Dai,
Xiaqin Fang,
Linhua Hu
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.1956
Subject(s) - photocurrent , electron , materials science , kinetics , electron transport chain , diffusion , spectroscopy , absorption (acoustics) , intensity (physics) , attenuation coefficient , analytical chemistry (journal) , optics , optoelectronics , chemistry , physics , thermodynamics , composite material , biochemistry , chromatography , quantum mechanics
The mechanics of electron transport and properties of back-reaction kinetics were investigated by intensity-modulated photocurrent spectroscopy (IMPS) and intensity-modulated photovoltage spectroscopy (IMVS). The theoretical expression fitting the experimental data of five different porous TiO2 films applied in DSC and the values of absorption coefficient (α)the diffusion coefficient (Dn)electron lifetime (τn)the electron transit time (τd) and IPCE can be obtained. The results showed that the electrons transit faster in the thinner filmswhile the electron concentration increase in the thicker films. The influence of film thickness on the electron generationtransport and recombination processes was investigated in the microscopic level in this paper.