Composite interfacial modification in TiO2 nanorod array/poly (3-hexylthiophene) hybrid photovoltaic devices

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[1] Xia, Hanming
[2] 1,Zhang, Tianjin
[3] Wang, Duofa
[4] Wang, Jingyang
[5] Liang, Kun
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Zhang, T. (tj65zhang@yahoo.com.cn) | 1600年 / Elsevier Ltd卷 / 575期
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Interfacial modification is an important approach to improve the efficiencies of organic/inorganic hybrid solar cells. A novel strategy of composite interfacial modification in TiO2 nanorod array/poly(3-hexylthiophene) (P3HT) hybrid solar cells had been proposed and carried out. The interfacial modification mechanism had been investigated comprehensively by considering various aspects such as light harvesting; carrier separation; charge recombination and energy level alignment. The results show that monolayer modifiers such as N719 or pyridine (PYR) can improve chemical incompatibility; accelerate carrier separation and reduce charge recombination. Composite interfacial modification had been realized by introducing CdSe; in which enhanced light harvesting was observed as well as the pre-existing advantages. The efficiencies of composite interfacial modified hybrid solar cells based on TiO2/CdSe/PYR/P3HT and TiO2/CdSe/N719/P3HT reached to 0.28% and 0.51%; which were 33% and 45% higher than that based on TiO2/PYR/P3HTand TiO2/N719/P3HT; respectively. © 2013 Elsevier B.V. All rights reserved;
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