Effects of lithium ion density on electron transport in nanoporous TiO2 electrodes

Citation
S. Nakade et al., Effects of lithium ion density on electron transport in nanoporous TiO2 electrodes, J PHYS CH B, 105(38), 2001, pp. 9150-9152
Citations number
12
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
JOURNAL OF PHYSICAL CHEMISTRY B
ISSN journal
1520-6106 → ACNP
Volume
105
Issue
38
Year of publication
2001
Pages
9150 - 9152
Database
ISI
SICI code
1520-6106(20010927)105:38<9150:EOLIDO>2.0.ZU;2-0
Abstract
The transport of photogenerated electrons in nanoporous TiO2 electrodes is examined in a lithium perchlorate electrolyte solution by laser-induced pho tocurrent transient measurements. The diffusion coefficients of the photoel ectrons are found to depend not only on electron density but also on the li thium ion concentration in the solution. The behavior of diffusion coeffici ents depending on lithium ion concentration is interpreted with an ambipola r diffusion mechanism. Diffusion coefficients at a high photoelectron densi ty were observed to level off at a low lithium ion concentration, which is attributed to the effect of an ambipolar diffusion mechanism.