The influence of particle sizes on the optical characteristics of nanocrystalline TiO2 films for dye-sensitized solar cells

Peter Chao Yu Chen, Guido Rothenberger, Michael Gratzel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Increasing the light harvesting efficiency (LHE) of photovoltaic devices is important for improving the conversion efficiency of solar light into electricity. The optical properties of mesoporous TiO2 films for Dye-Sensitized Solar Cells (DSCs) were investigated by varying the size of the particles (20 - 150 nm). A four-flux optical model was used to describe the light absorption and scattering within the film. Reflectance and transmittance spectra were recorded by a spectrophotometer equipped with an integrating sphere. The wavelength-dependent absorption coefficient k(λ) and scattering coefficient s(λ) were determined for different films. The absorptance G(λ) (absorbed light flux) for films made of different particle sizes and of varying thicknesses can be calculated from these optical parameters. This study helps in improving the optical design of dye-sensitized solar cells.

Original languageEnglish
Title of host publicationMaterials Research Society Symposium Proceedings - Light Management in Photovoltaic Devices-Theory and Practice
PublisherMaterials Research Society
Pages127-132
Number of pages6
ISBN (Print)9781605608594
DOIs
Publication statusPublished - 2008 Jan 1
EventLight Management in Photovoltaic Devices-Theory and Practice - San Francisco, CA, United States
Duration: 2008 Mar 242008 Mar 28

Publication series

NameMaterials Research Society Symposium Proceedings
Volume1101
ISSN (Print)0272-9172

Conference

ConferenceLight Management in Photovoltaic Devices-Theory and Practice
CountryUnited States
CitySan Francisco, CA
Period08-03-2408-03-28

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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