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Octadecyltriethoxysilane Surface Modification of Zinc Oxide

Published online by Cambridge University Press:  01 February 2011

Cary Allen ,
Darick J. Baker ,
Thomas E. Furtak ,
Reuben T. Collins ,
Matthew S. White ,
Dane T. Gillaspie ,
Dana C. Olson  and
David S. Ginley
Cary Allen
Affiliation:
carygallen@gmail.com, Colorado School of Mines, Physics, 1523 Illinois St., Golden, CO, 80401, United States, 970 946 6656
Darick J. Baker
Affiliation:
dbaker@mines.edu, Colorado School of Mines, Physics, 1523 Illinois St., Golden, CO, 80401, United States
Thomas E. Furtak
Affiliation:
tfurtak@mines.edu, Colorado School of Mines, Physics, 1523 Illinois St., Golden, CO, 80401, United States
Reuben T. Collins
Affiliation:
rtcollin@mines.edu, Colorado School of Mines, Physics, 1523 Illinois St., Golden, CO, 80401, United States
Matthew S. White
Affiliation:
matthew_white@nrel.gov, National Renewable Energy Laboratory, 1617 Cole Blvd., Golden, CO, 80401, United States
Dane T. Gillaspie
Affiliation:
Dane_Gillaspie@nrel.gov, National Renewable Energy Laboratory, 1617 Cole Blvd., Golden, CO, 80401, United States
Dana C. Olson
Affiliation:
dana_olson@nrel.gov, National Renewable Energy Laboratory, 1617 Cole Blvd., Golden, CO, 80401, United States
David S. Ginley
Affiliation:
david_ginley@nrel.gov, National Renewable Energy Laboratory, 1617 Cole Blvd., Golden, CO, 80401, United States
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Abstract

Zinc Oxide (ZnO) is actively investigated for hybrid organic inorganic device applications. The interface greatly influences the electronic properties of these devices. Molecular surface modification of ZnO is being investigated for its potential to control the alignment of energy levels, charge transfer, as well as, interfacial chemical characteristics that influence device fabrication. In this study, octadecyltriethoxysilane (OTES) treatments of thin film ZnO produced by sol-gel decomposition were explored. The ZnO films were hydroxylated and then modified using OTES in solution. The condensation reaction of the OTES at the surface was promoted by the addition of a protoamine catalyst. Contact angle and infrared spectroscopy studies confirmed the surface modification and indicated that the coverage of the OTES was submonolayer. The modified ZnO films were reproducible and stable for long periods. The effects of the modification on subsequently spin-cast poly[3-hexylthiophene](P3HT) and on hybrid ZnO/P3HT organic solar cell performance are discussed.

Keywords

sol-gelorganicoxide
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1091: Symposium AA – Conjugated Organic Materials–Synthesis, Structure, Device and Applications , 2008 , 1091-AA05-78
Copyright
Copyright © Materials Research Society 2008

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