Efficient hybrid carboxylated polythiophene/nanocrystalline TiO2 heterojunction solar cells |
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Authors: | Shengli Lu Ling Zeng Bufan Ren Heyang Liu Jianwei Mao |
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Affiliation: | a Institute for Organic Photovoltaic Materials and Devices, School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, PR China b Zhejiang Wynca Chemical Group Co., Ltd., 311600 Hangzhou, PR China |
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Abstract: | Efficient hybrid solar cells fabricated from TiO2, novel carboxylated polythiophene poly (3-thiophenemalonic acid) P3TMA as sensitizer as well as hole conductor and poly (3-hexylthiophene) (P3HT) as hole transporter was described. UV-Vis absorption and morphology of the active layer were investigated. Device J/V characterizations with different P3HT layer thickness were measured and discussed. Efficiency improvements were observed in thinner P3HT layer thickness and with poly3,4-(ethylenedioxy)-thiophene]:poly(styrene sulfonate) (PEDOT:PSS) as charge collection layer, and such device showed a short-circuit current density of 1.32 mA/cm2, an open-circuit voltage of 0.44 V, a fill factor of 0.43, and a energy conversion efficiency of 0.25% at A.M. 1.5 solar illumination (100 mW/cm2). |
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Keywords: | Carboxylated polythiophene Hybrid solar cells TiO2 Photovoltaic characterization |
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