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Optimum oxide thickness for dye-sensitized solar cells-effect of porosity and porous size. A numerical approach

DSpace at IIT Bombay

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Title Optimum oxide thickness for dye-sensitized solar cells-effect of porosity and porous size. A numerical approach
 
Creator JOSHI, PH
KORFIATIS, DP
POTAMIANOU, SF
THOMA, KAT
 
Subject Modeling
Solar cells
ELECTRON-TRANSPORT
POTENTIAL DISTRIBUTION
TIO2 FILMS
PHOTOCURRENT
PERFORMANCE
EFFICIENCY
RECOMBINATION
DYNAMICS
PROGRESS
RANGE
 
Description The microstructure of the metal semiconductor oxide which forms the heart of a dye-sensitized solar cell (DSSC) has proved to play a key role in the enhancement of photoelectric conversion efficiency of the cell. In this work, a numerical simulation of the system TiO2 photo-sensitive dye of a TiO2 DSSC focuses on the effect that the oxide porosity and the size of the pores have on the cell's performance. The steady-state numerical model used is based on the continuity and transport equations for charge species involved in the system, in connection to Poisson's equation. Light absorption coefficient is set dependent on both porosity and the size of pores in TiO2. At a first approximation, electron mobility is considered dependent upon porosity following an iteration procedure dependent also upon local field in the oxide. An effective dielectric constant dependent upon the porosity of TiO2, as well, is used in the model. Electron lifetime in the bulk is set dependent upon electron distribution following the iteration procedure with electron lifetime at the surface taking into consideration surface recombination. Results for different values of TiO2 porosity and pores' size in connection to the oxide thickness are discussed and found in accordance with results reported in the literature.
 
Publisher SPRINGER HEIDELBERG
 
Date 2014-10-16T12:23:05Z
2014-10-16T12:23:05Z
2013
 
Type Article
 
Identifier IONICS, 19(3)571-576
http://dx.doi.org/10.1007/s11581-012-0755-3
http://dspace.library.iitb.ac.in/jspui/handle/100/15536
 
Language en