POTENTIAL-DEPENDENT ELECTRON INJECTION IN NANOPOROUS COLLOIDAL ZNO FILMS

Authors
Citation
P. Hoyer et H. Weller, POTENTIAL-DEPENDENT ELECTRON INJECTION IN NANOPOROUS COLLOIDAL ZNO FILMS, Journal of physical chemistry, 99(38), 1995, pp. 14096-14100
Citations number
21
Categorie Soggetti
Chemistry Physical
ISSN journal
00223654
Volume
99
Issue
38
Year of publication
1995
Pages
14096 - 14100
Database
ISI
SICI code
0022-3654(1995)99:38<14096:PEIINC>2.0.ZU;2-B
Abstract
We have quantitatively investigated the charging of colloidal ZnO film s by cyclic voltammetry and potential step measurements. Up to six ele ctrons can be stored on each colloidal particle of the film (mean part icle diameter 5.9 nm) before zinc reduction occurs. Fluorescence and a bsorbance of the films are already strongly influenced in potential re gions where less than one electron is stored on each particle. Potenti ostatically controlled and time-resolved photocurrent measurements sho w the influence of trap filling as well as the role of the electrolyte on the charge transport through the films.