A 22% Efficient Semiconductor/Liquid Junction Solar Cell—the Photoelectrochemical Behavior of n-WSe2 Electrodes in the Presence of I2/I- in Aqueous Electrolyte

Autor: G. Campet, C. Azaiez, F. Levy, H. Bourezc, J. Claverie
Jazyk: angličtina
Rok vydání: 1988
Předmět:
Zdroj: Active and Passive Electronic Components, Vol 13, Iss 1, Pp 33-43 (1988)
Druh dokumentu: article
ISSN: 0882-7516
1563-5031
DOI: 10.1155/1988/16057
Popis: One of the most efficient semiconductor/liquid-junction photoelectrochemical cells (PEC) reported to date is presented. It consists of a SeCl4-grown n-WSe2 single crystal anode, with a 3.1016 cm-3 conduction-band electronic density, and a platinum cathode. Both electrodes are immersed in a 2M KI + 0.005M I2 aqueous electrolyte. The calculations of the main physical parameters determining the high value (22%) of the visible light-to-electrical energy conversion efficiency have been carried out. We particularly show that the lifetime of the photogenerated holes is larger than their transit time across the space-charge so that the carriers reach the semiconductor surface, where they can react with the electrolyte, without recombining.
Databáze: Directory of Open Access Journals
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