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- In relation to this article, we declare that there is no conflict of interest.
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Received December 11, 2009
Accepted December 16, 2009
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Copyright © KIChE. All rights reserved.
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Light management in dye-sensitized solar cell
School of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, Korea
npark@skku.edu
Korean Journal of Chemical Engineering, February 2010, 27(2), 375-384(10), 10.1007/s11814-010-0112-z
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Abstract
Dye-sensitized solar cell (DSSC) is composed of a nanocrystalline TiO2 film whose surface is covered with dye molecules, an iodide/tri-iodide electrolyte and a platinum counter electrode. Charge generation occurs when dye absorbs photon energy, which is separated by injection of photo-excited electrons into the conduction band of TiO2. The photo-injected electrons are transported through TiO2 network and collected at transparent conducting electrode. The oxidized dyes are regenerated by oxidation of iodide. Light-to-electricity conversion efficiency depends on photocurrent density, open-circuit voltage and fill factor. Photocurrent density is related to the incident photon-to-current conversion efficiency (IPCE) that is a collective measure of light harvesting, charge separation and charge collection efficiency. Since the higher IPCE, the higher photocurrent density becomes, light management in DSSC is one of most important issues. In this paper, effective methods to improve IPCE are described including size-dependent light scattering effect, bi-functionality design in material synthesis and panchromatic approach such as selective position of different dyes in a mesoporous TiO2 film.
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Usami A, Sol. Energy Mater. Sol. Cells, 64, 73 (2000)
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Usami A, Sol. Energy Mater. Sol. Cells, 59(3), 163 (1999)
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