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Nanocrystalline Photoelectrochemical Cells: A New Concept In Photovoltaic Cells

Nanocrystalline Photoelectrochemical Cells: A New Concept In Photovoltaic Cells Semiconductor films with small crystal size normally exhibit prohibitively large recombination losses in photovoltaic cells. We show that porous nanocrystalline films of and can be used as photoelectrodes in photoelectrochemical cells with relatively low recombination losses. Spectral response measurements show how the recombination losses depend on film thickness. These photoelectrochemical cells operate due to charge separation at the semiconductor‐electrolyte interface rather than by a built‐in space charge layer as normally occurs in photovoltaic or photoelectrochemical cells. The rapid removal of one charge by the electrolyte explains the low recombination loss. The mechanism of these photoelectrochemical cells regarding the direction of photocurrent flow and the value of photovoltage is discussed. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of the Electrochemical Society IOP Publishing

Nanocrystalline Photoelectrochemical Cells: A New Concept In Photovoltaic Cells

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Copyright
Copyright © 1992 ECS - The Electrochemical Society
ISSN
0013-4651
eISSN
1945-7111
DOI
10.1149/1.2069045
Publisher site
See Article on Publisher Site

Abstract

Semiconductor films with small crystal size normally exhibit prohibitively large recombination losses in photovoltaic cells. We show that porous nanocrystalline films of and can be used as photoelectrodes in photoelectrochemical cells with relatively low recombination losses. Spectral response measurements show how the recombination losses depend on film thickness. These photoelectrochemical cells operate due to charge separation at the semiconductor‐electrolyte interface rather than by a built‐in space charge layer as normally occurs in photovoltaic or photoelectrochemical cells. The rapid removal of one charge by the electrolyte explains the low recombination loss. The mechanism of these photoelectrochemical cells regarding the direction of photocurrent flow and the value of photovoltage is discussed.

Journal

Journal of the Electrochemical SocietyIOP Publishing

Published: Nov 1, 1992

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