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Studies of Charge Transport Properties in P3HT/ZnO Composites Using Photoinduced Charge Extraction by Linearly Increasing Voltage Technique

Published online by Cambridge University Press:  01 February 2011

Vijila Chellappan ,
Furong Zhu ,
Minghui Liu  and
Kian Ping Loh
Vijila Chellappan
Affiliation:
marco.stella@ub.edu, Universitat de Barcelona, Física Aplicada i Òptica, Barcelona, 08028, Spain
Furong Zhu
Affiliation:
fr-zhu@imre.a-star.edu.sg, Institute of Materials Research and Engineering, Synthesis and Integration, 3, Research Link,, Singapore 117602, Singapore, N/A, Singapore, 68720785
Minghui Liu
Affiliation:
nnilm@nus.edu.sg, National University of Singapore, Department of Chemistry, Singapore, 119077, Singapore
Kian Ping Loh
Affiliation:
chmlohkp@nus.edu.sg, National University of Singapore, Department of Chemistry, Singapore, 119077, Singapore
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Abstract

The charge transport properties in a mixture of regio-regular (poly 3-hexylthiophene) (RR-P3HT) and Zinc Oxide nano particle (ZnO) have been studied using the photoinduced charge extraction by linearly increasing voltage (PhotoCELIV) technique. We have studied the effect of ZnO nanoparticle size (12 nm and 50 nm) on the charge transport properties by fixing the composition ratio of P3HT/ZnO hybrid. The PhotoCELIV mobility in P3HT/50nm-ZnO at room temperature is found to be 7.8×10−5cm2/Vs at an applied electric field of 2.5 × 104 V/cm, which increases to 1.7×10−4cm2/Vs for P3HT/12nm-ZnO composite. The temperature and electric field dependence of charge mobility in these composites have been studied and analysed using Gaussian disorder formalism. The obtained results suggest that the charge transport properties in P3HT/ZnO composite, at low ZnO concentrations, can be tuned by varying the size of the nanoparticle.

Keywords

electrical propertiesoptoelectronicthin film
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1091: Symposium AA – Conjugated Organic Materials–Synthesis, Structure, Device and Applications , 2008 , 1091-AA05-62
Copyright
Copyright © Materials Research Society 2008

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