PHOTOELECTROCHEMICAL STUDIES OF SPRAYED THIN-FILM N-ZNO ACETONITRILE BASED PHOTOCELL SENSITIZED BY RHODAMINE-B/

Citation
L. Bahadur et Jp. Pandey, PHOTOELECTROCHEMICAL STUDIES OF SPRAYED THIN-FILM N-ZNO ACETONITRILE BASED PHOTOCELL SENSITIZED BY RHODAMINE-B/, INDIAN JOURNAL OF CHEMICAL TECHNOLOGY, 1(1), 1994, pp. 53-59
Citations number
NO
Categorie Soggetti
Chemistry Applied","Engineering, Chemical
ISSN journal
0971457X
Volume
1
Issue
1
Year of publication
1994
Pages
53 - 59
Database
ISI
SICI code
0971-457X(1994)1:1<53:PSOSTN>2.0.ZU;2-9
Abstract
Photoelectrochemical cell based on thin film ZnO electrode sensitized by rhodamine B (Rh B) has been studied in acetonitrile medium using hy droquinone as supersensitizer. Redox potentials of Rh B determined cyc lic voltammetrically at Pt electrode in acetonitrile, coupled with the flat-band potential of ZnO electrode (obtained from Mott-Schottky plo t) have been used to determine their respective energy levels. Stable photovoltage was found to be -260 mV. Quantum efficiency of the sensit ized photocurrent at 550 nm wavelength of monochromatic light was foun d to be 6.5%, the highest ever reported for pure ZnO electrode sensiti zed by Rh B. Long-term stability of ZnO electrode in the medium of inv estigation has been tested and quite encouraging results have been obt ained.