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Comparison of Molecular Monolayer Interface Treatments in Organic-inorganic Photovoltaic Devices

Published online by Cambridge University Press:  31 January 2011

Jamie M. Albin ,
Darick J. Baker ,
Cary G. Allen ,
Thomas E. Furtak ,
Reuben T. Collins ,
Dana C. Olson ,
David S. Ginley ,
Christian C. Weigand ,
Astrid-Sofie Vardoy  and
Cecile Ladam
Jamie M. Albin
Affiliation:
[email protected], Colorado School of Mines, Physics, Golden, Colorado, United States
Darick J. Baker
Affiliation:
[email protected], Colorado School of Mines, Physics, Golden, Colorado, United States
Cary G. Allen
Affiliation:
[email protected], Colorado School of Mines, Physics, 80401, Colorado, United States
Thomas E. Furtak
Affiliation:
[email protected], United States
Reuben T. Collins
Affiliation:
[email protected], Colorado School of Mines, Physics, Golden, Colorado, United States
Dana C. Olson
Affiliation:
[email protected], United States
David S. Ginley
Affiliation:
[email protected], United States
Christian C. Weigand
Affiliation:
[email protected], Norwegian University of Science and Technology, Electronics and Telecommunications, Trondheim, Norway
Astrid-Sofie Vardoy
Affiliation:
[email protected], Norwegian University of Science and Technology, Electronics and Telecommunications, Trondheim, Norway
Cecile Ladam
Affiliation:
[email protected], SINTEF, Materials and Chemistry, Trondheim, Norway
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Abstract

In this study, we explore the effects of alkyl surface terminations on ZnO for inverted, planar ZnO/poly(3-hexylthiophene) (P3HT) solar cells using two different attachment chemistries. Octadecylthiol (ODT) and octadecyltriethoxysilane (OTES) molecules were used to create 18-carbon alkyl surface molecular layers on sol gel-derived ZnO surfaces. Molecular layer formation was confirmed and characterized using water contact angle measurements, infrared (IR) transmission measurements, and X-ray photoelectron spectroscopy (XPS). The performances of the ZnO/P3HT photovoltaic cells made from ODT- and OTES-functionalized ZnO were compared. The ODT-modified devices had higher efficiencies than OTES-modified devices, suggesting that differences in the attachment scheme affect the efficiency of charge transfer through the molecular layers at the treated ZnO surface.

Keywords

Znoxidephotovoltaic
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1154: Symposium B – Concepts in Molecular and Organic Electronics , 2009 , 1154-B10-40
Copyright
Copyright © Materials Research Society 2009

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