The preparation and properties of bulk-heterojunction organic solar cells with indole-containing fulleropyrrolidine derivatives as acceptors |
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| Authors: | Xiaona Zhang Liang Sun Wei Zheng Xichang Bao Ning Wang Ting Wang Renqiang Yang |
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| Institution: | 1. Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China;2. College of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150080, China;3. University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | Two indole-containing fullerene derivatives, N-hydrogen-2-3-(N-2-ethylhexylindolyl)]60]fulleropyrrolidine (EHIHC60P), and N-(2-ethylhexylindolyl))-2-3-(N-2-ethylhexylindolyl)]60]fulleropyrrolidine (DEHIC60P) were synthesized by the typical Prato reaction. The absorption spectra, electrochemical properties of the two compounds were measured. Inverted solar cells were fabricated with the structure of ITO/ZnO/poly(3-hexylthiophene) (P3HT):fullerene derivatives/MoO3/Ag. The highest power conversion efficiencies (PCEs) of 3.32% and 3.23% were obtained for P3HT/EHIHC60P and P3HT/DEHIC60P based solar cells at the composite ratio of 1:1 after the active layers were annealed at 150 °C under inert atmosphere, with a open-circuit voltage (Voc) of 0.66 V and 0.74 V, respectively. For comparison, the device based on P3HT/PCBM at the same conditions showed the PCE of 3.28%, with a Voc of 0.61 V. The influence on the photovoltaic property of the fullerene derivatives, which was induced by some subtle changes in the chemical structure was compared and discussed. |
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| Keywords: | Photovoltaic effect Fullerene derivative Indole Electron acceptor |
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