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Title: Titania Particle Size Effect on the Overall Performance of Dye-Sensitized Solar Cells

Abstract

In this paper, we report the solar cell performance of titania (TiO2) film electrodes with various particle sizes. It was found that the TiO2 nanoparticle film with smaller particles ~ 10 nm in diameter resulted in a lower overall light conversion efficiency of ~ 1.4% with an open-circuit voltage of ~ 730 mV, a short-circuit current density of ~ 3.6 mA/cm2, and a fill factor of ~ 54%. Larger particles ~ 23 nm in diameter resulted in a higher efficiency ~ 5.2% with an open-circuit voltage of ~ 730 mV, a short-circuit current density of ~ 12.2 mA/cm2, and a fill factor of ~ 58%. Although it was anticipated that particles with smaller diameters would adsorb more dye due to its larger surface area, it was found that particles with larger diameters had better dye adsorption for increased electron-hole generation, resulting in higher short-circuit current density and overall light conversion efficiency. Larger particles were shown to have better dye adsorption, indicating that films consisting of larger particles had greater effective surface area for greater photon absorption and electron-hole generation.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
909457
Report Number(s):
PNNL-SA-55318
TRN: US200722%%1264
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Physical Chemistry C, 111(17):6296-6302; Journal Volume: 111; Journal Issue: 17
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; ABSORPTION; ADSORPTION; CURRENT DENSITY; DYES; EFFICIENCY; ELECTRIC POTENTIAL; ELECTRODES; FILL FACTORS; PARTICLE SIZE; PERFORMANCE; PHOTONS; SOLAR CELLS; SURFACE AREA

Citation Formats

Chou, Tammy P., Zhang, Qifeng, Bryan, Russo, Fryxell, Glen E., and Cao, Guozhong. Titania Particle Size Effect on the Overall Performance of Dye-Sensitized Solar Cells. United States: N. p., 2007. Web. doi:10.1021/jp068939f.
Chou, Tammy P., Zhang, Qifeng, Bryan, Russo, Fryxell, Glen E., & Cao, Guozhong. Titania Particle Size Effect on the Overall Performance of Dye-Sensitized Solar Cells. United States. doi:10.1021/jp068939f.
Chou, Tammy P., Zhang, Qifeng, Bryan, Russo, Fryxell, Glen E., and Cao, Guozhong. Thu . "Titania Particle Size Effect on the Overall Performance of Dye-Sensitized Solar Cells". United States. doi:10.1021/jp068939f.
@article{osti_909457,
title = {Titania Particle Size Effect on the Overall Performance of Dye-Sensitized Solar Cells},
author = {Chou, Tammy P. and Zhang, Qifeng and Bryan, Russo and Fryxell, Glen E. and Cao, Guozhong},
abstractNote = {In this paper, we report the solar cell performance of titania (TiO2) film electrodes with various particle sizes. It was found that the TiO2 nanoparticle film with smaller particles ~ 10 nm in diameter resulted in a lower overall light conversion efficiency of ~ 1.4% with an open-circuit voltage of ~ 730 mV, a short-circuit current density of ~ 3.6 mA/cm2, and a fill factor of ~ 54%. Larger particles ~ 23 nm in diameter resulted in a higher efficiency ~ 5.2% with an open-circuit voltage of ~ 730 mV, a short-circuit current density of ~ 12.2 mA/cm2, and a fill factor of ~ 58%. Although it was anticipated that particles with smaller diameters would adsorb more dye due to its larger surface area, it was found that particles with larger diameters had better dye adsorption for increased electron-hole generation, resulting in higher short-circuit current density and overall light conversion efficiency. Larger particles were shown to have better dye adsorption, indicating that films consisting of larger particles had greater effective surface area for greater photon absorption and electron-hole generation.},
doi = {10.1021/jp068939f},
journal = {Journal of Physical Chemistry C, 111(17):6296-6302},
number = 17,
volume = 111,
place = {United States},
year = {Thu May 03 00:00:00 EDT 2007},
month = {Thu May 03 00:00:00 EDT 2007}
}