Multi-alkylthienyl appended porphyrins for efficient dye-sensitized solar cells |
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| Affiliation: | 1. College of Chemistry, Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, Xiangtan University, Xiangtan 411105, PR China;2. Key Laboratory of Advanced Functional Polymeric Materials, College of Hunan Province, Xiangtan University, Xiangtan 411105, PR China;1. State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals, Lanzhou University of Technology, Lanzhou, Gansu 730050, China;2. Department of Applied Physics, Lanzhou University of Technology, Lanzhou, Gansu 730050, China;3. Gansu Computing Center, Lanzhou, Gansu 730030, China;4. Department of Physics, Lanzhou City University, Lanzhou 730070, China;1. QOPNA, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal;2. CICECO, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal;1. Key Laboratory of Applied Surface and Colloid Chemistry, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710062, China;2. Xi’an Modern Chemistry Research Institute, Xi’an 710065, China |
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| Abstract: | Four porphyrin dyes, incorporating multi-alkylthienyl appended porphyrins as the electron donor, the 2-cyanoacrylic acid as the electron acceptor, and different π-conjugated spacer, have been synthesized for dye-sensitized solar cells (DSSCs). All the porphyrin dyes studied in this work exhibit red-shifted and broadened electronic spectra respect to the reference PZn as expected. By the introduction of thienyl groups at the meso-positions, the energy level of Eox (excited-state oxidation potentials) is significantly shifted to the positive compared with the reference PZn, indicating a decreased HOMO–LUMO gap. The highest power conversion efficiency of the four dyes based on DSSCs reached 5.71% under AM 1.5 G irradiation. |
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