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26 August 2008 Charge transport properties of low-temperature solution processable poly(3-hexylthiophene)/surface modified TiO2 bulk heterojunction systems
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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Proceedings Volume 7052, Organic Photovoltaics IX; 705219 (2008) https://doi.org/10.1117/12.794757
Event: Photonic Devices + Applications, 2008, San Diego, California, United States
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.
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Fang-Chi Hsu, Yu-Ching Huang, Yu-Chia Liao, Jui-Hung Hsu, Wei-Che Yen, Chun-Wei Chen, and Wei-Fang Su "Charge transport properties of low-temperature solution processable poly(3-hexylthiophene)/surface modified TiO2 bulk heterojunction systems", Proc. SPIE 7052, Organic Photovoltaics IX, 705219 (26 August 2008); https://doi.org/10.1117/12.794757
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KEYWORDS
Titanium dioxide
Nanorods
Interfaces
Polymers
Composites
Heterojunctions
Solar cells
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