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Proceedings Paper

Charge transport properties of low temperature solution processable poly(3-hexylthiophene)/surface modified TiO2 bulk heterojunction systems
Author(s): Fang-Chi Hsu; Yu-Ching Huang; Yu-Chia Liao; Jui-Hung Hsu; Wei-Che Yen; Chun-Wei Chen; Wei-Fang Su
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Paper Abstract

The solution processable poly(3-hexylthiophene)(P3HT)/TiO2-nanorod hybrid material for solar cells has been successfully demonstrated. A critical issue for using hybrid heterojunction concept is the interface properties which affect the exciton separation efficiency and bi-carrier transport. To improve the interface properties, we replace the insulating surfactant on TiO2 nanorod surface with a more conductive oligomer, carboxylate terminated 3-hexylthiophene (P3HT-COOH). The enhancement of exciton separation efficiency due to better organic-inorganic interfacial compatibility can be obtained. The electron mobility for transporting in the TiO2 network is improved. A power conversion efficiency has been increased 3 times by using this new hybrid material without optimization as compared with the hybrid without P3HT-COOH modification.

Paper Details

Date Published: 26 August 2008
PDF: 7 pages
Proc. SPIE 7052, Organic Photovoltaics IX, 705219 (26 August 2008); doi: 10.1117/12.794757
Show Author Affiliations
Fang-Chi Hsu, National Taiwan Univ. (Taiwan)
Yu-Ching Huang, National Taiwan Univ. (Taiwan)
Yu-Chia Liao, National Taiwan Univ. (Taiwan)
Jui-Hung Hsu, National Taiwan Univ. (Taiwan)
Wei-Che Yen, National Taiwan Univ. (Taiwan)
Chun-Wei Chen, National Taiwan Univ. (Taiwan)
Wei-Fang Su, National Taiwan Univ. (Taiwan)

Published in SPIE Proceedings Vol. 7052:
Organic Photovoltaics IX
Zakya H. Kafafi; Paul A. Lane, Editor(s)

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