Star-shaped magnesium tetraethynylporphyrin bearing four peripheral electron-accepting diketopyrrolopyrrole functionalities for organic solar cells
Wang H, Yue Q, Nakagawa T, Zieleniewska A, Okada H, Ogumi K, Ueno H, Guldi DM, Zhu X, Matsuo Y (2019)
Publication Type: Journal article
Publication year: 2019
Journal
Book Volume: 7
Pages Range: 4072-4083
Journal Issue: 8
DOI: 10.1039/c8ta10710f
Abstract
Magnesium tetraethynylporphyrins bearing four electron-deficient diketopyrrolopyrrole (DPP; Mg-TEP-DPP4) units were synthesized by Sonogashira coupling, and their optical and electrochemical properties were investigated. The energy levels were effectively tuned by DPP with or without electron-withdrawing end-caps. Importantly, all the Mg-TEP-DPP4 molecules have broad absorption bands across the visible and near-infrared regions. The time-dependent excited state features of Mg-TEP-DPP4 and their kinetics were investigated by femtosecond transient absorption spectroscopy in combination with multiwavelength and global/target analyses of time-resolved spectra. Importantly, the charge-separated state was demonstrated to undergo recombination within 253 ps in benzonitrile. Bulk heterojunction organic solar cells fabricated with Mg-TEP-DPP4:PC61BM exhibited a power conversion efficiency of 7.40% after solvent vapor annealing, which enabled balanced charge carrier transport, reduced charge recombination, and favorable charge separation and collection.
Authors with CRIS profile
Anna Zieleniewska
Lehrstuhl für Physikalische Chemie I
Dirk Michael Guldi
Lehrstuhl für Physikalische Chemie I
Involved external institutions
Chinese Academy of Sciences (CAS) / 中国科学院
China (CN)
University of Science and Technology of China (USTC)
China (CN)
Tokyo Metropolitan Industrial Technology Research Institute
Japan (JP)
University of Tokyo
Japan (JP)
Northeast Normal University / 东北师范大学
China (CN)
China (CN)
University of Science and Technology of China (USTC)
China (CN)
Tokyo Metropolitan Industrial Technology Research Institute
Japan (JP)
University of Tokyo
Japan (JP)
Northeast Normal University / 东北师范大学
China (CN)
How to cite
APA:
Wang, H., Yue, Q., Nakagawa, T., Zieleniewska, A., Okada, H., Ogumi, K.,... Matsuo, Y. (2019). Star-shaped magnesium tetraethynylporphyrin bearing four peripheral electron-accepting diketopyrrolopyrrole functionalities for organic solar cells. Journal of Materials Chemistry A, 7(8), 4072-4083. https://dx.doi.org/10.1039/c8ta10710f
MLA:
Wang, Huan, et al. "Star-shaped magnesium tetraethynylporphyrin bearing four peripheral electron-accepting diketopyrrolopyrrole functionalities for organic solar cells." Journal of Materials Chemistry A 7.8 (2019): 4072-4083.
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