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Investigation of polymer/inorganic hybrid photovoltaic device using quantum dots as the interface modifier |
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| Authors: | Jingyang Wang Tianjin Zhang Shaohua Qu Zhicheng Zhong Song Wang |
| Affiliation: | 1. School of Physics and Electronic Engineering, Hubei University of Arts and Science, Xiangyang, 441053, China 2. Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices, Hubei University of Arts and Science, Xiangyang, 441053, China 3. School of Materials Science and Engineering, Hubei University, Wuhan, 430062, People’s Republic of China |
| Abstract: | CdS quantum dots (QDs) were introduced as an interface modifier in the poly(3-hexylthiophene) (P3HT)/TiO2 nanorod arrays hybrid photovoltaic device. The presence of CdS QDs interlayer was found to provide enhanced light absorption, increased interfacial recombination resistance at the P3HT/TiO2 interfaces, thus leading to a lower recombination rate of the electrons due to the stepwise structure of band edge in P3HT/CdS/TiO2, which accounts for the observed enhanced photocurrent and photovoltage of the hybrid solar cells. The optimized performance was achieved in P3HT/CdS/TiO2 hybrid solar cells after deposition of CdS QDs for 10 cycles, with a power conversion efficiency of 0.57 %, which is nearly ten times higher than that of P3HT/TiO2. The findings indicate that inorganic semiconductor quantum dots provide effective means to improve the performance of polymer/TiO2 hybrid solar cells. |
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