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Title: Surface Binding and Organization of Sensitizing Dyes on Metal Oxide Single Crystal Surfaces

Abstract

Even though investigations of dye-sensitized nanocrystalline semiconductors in solar cells has dominated research on dye-sensitized semiconductors over the past two decades. Single crystal electrodes represent far simpler model systems for studying the sensitization process with a continuing train of studies dating back more than forty years. Even today single crystal surfaces prove to be more controlled experimental models for the study of dye-sensitized semiconductors than the nanocrystalline substrates. We analyzed the scientific advances in the model sensitized single crystal systems that preceded the introduction of nanocrystalline semiconductor electrodes. It then follows the single crystal research to the present, illustrating both their striking simplicity of use and clarity of interpretation relative to nanocrystalline electrodes. Researchers have employed many electrochemical, photochemical and scanning probe techniques for studying monolayer quantities of sensitizing dyes at specific crystallographic faces of different semiconductors. These methods include photochronocoulometry, electronic spectroscopy and flash photolysis of dyes at potential-controlled semiconductor electrodes and the use of total internal reflection methods. In addition, we describe the preparation of surfaces of single crystal SnS2 and TiO2 electrodes to serve as reproducible model systems for charge separation at dye sensitized solar cells. This process involves cleaving the SnS2 electrodes and a photoelectrochemical surfacemore » treatment for TiO2 that produces clean surfaces for sensitization (as verified by AFM) resulting in near unity yields for electron transfer from the molecular excited dyes into the conduction band.« less

Authors:
Publication Date:
Research Org.:
Colorado State Univ., Fort Collins, CO (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
982894
Report Number(s):
DOE FG02-96ER14625-final
DOE Contract Number:  
FG02-96ER14625
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; Dye sensitization, semiconductor, crystal surfaces

Citation Formats

Parkinson, Bruce. Surface Binding and Organization of Sensitizing Dyes on Metal Oxide Single Crystal Surfaces. United States: N. p., 2010. Web. doi:10.2172/982894.
Parkinson, Bruce. Surface Binding and Organization of Sensitizing Dyes on Metal Oxide Single Crystal Surfaces. United States. https://doi.org/10.2172/982894
Parkinson, Bruce. 2010. "Surface Binding and Organization of Sensitizing Dyes on Metal Oxide Single Crystal Surfaces". United States. https://doi.org/10.2172/982894. https://www.osti.gov/servlets/purl/982894.
@article{osti_982894,
title = {Surface Binding and Organization of Sensitizing Dyes on Metal Oxide Single Crystal Surfaces},
author = {Parkinson, Bruce},
abstractNote = {Even though investigations of dye-sensitized nanocrystalline semiconductors in solar cells has dominated research on dye-sensitized semiconductors over the past two decades. Single crystal electrodes represent far simpler model systems for studying the sensitization process with a continuing train of studies dating back more than forty years. Even today single crystal surfaces prove to be more controlled experimental models for the study of dye-sensitized semiconductors than the nanocrystalline substrates. We analyzed the scientific advances in the model sensitized single crystal systems that preceded the introduction of nanocrystalline semiconductor electrodes. It then follows the single crystal research to the present, illustrating both their striking simplicity of use and clarity of interpretation relative to nanocrystalline electrodes. Researchers have employed many electrochemical, photochemical and scanning probe techniques for studying monolayer quantities of sensitizing dyes at specific crystallographic faces of different semiconductors. These methods include photochronocoulometry, electronic spectroscopy and flash photolysis of dyes at potential-controlled semiconductor electrodes and the use of total internal reflection methods. In addition, we describe the preparation of surfaces of single crystal SnS2 and TiO2 electrodes to serve as reproducible model systems for charge separation at dye sensitized solar cells. This process involves cleaving the SnS2 electrodes and a photoelectrochemical surface treatment for TiO2 that produces clean surfaces for sensitization (as verified by AFM) resulting in near unity yields for electron transfer from the molecular excited dyes into the conduction band.},
doi = {10.2172/982894},
url = {https://www.osti.gov/biblio/982894}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jun 04 00:00:00 EDT 2010},
month = {Fri Jun 04 00:00:00 EDT 2010}
}