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triphenylamine-based highly active two-photon absorbing chromophores with push-pull systems

Chinese Chemical Letters 2023年第7期34卷 444-448页

作者： Yanqi Ban Linhong Hao Zhenbo Peng Lishui Sun Lihua Teng Yingjie Zhao College of Polymer Science and Engineering Qingdao University of Science and TechnologyQingdao 266042China College of Mathematics and Physics Qingdao University of Science and TechnologyQingdao 266061China

Two triphenylamine-based star-type push-pull chromophores(T1, T2) were designed and synthesized.triphenylamine serves as the central core and acts as an electron-donating group surrounded by electronwithdrawing pentafluorobenzene or N,N-dimethyl substituted tetrafluorobenzene, which are connected by ethylene bridges. Single-crystal X-ray diffraction confirmed the structures and molecular arrangement of two chromophores. The systematic photophysical research of T1 and T2 absorption characteristics was carried out to gain a better understanding of how structure-property relationships affect the observed nonlinear optical absorption phenomenon. Complementary calculations based on density functional theory(DFT) further confirmed the experimental results. Both chromophores exhibited excellent two-photon absorption(TPA) properties in CH_(2)Cl_(2). Notably, T2 has more remarkable nonlinear optical absorption effects with the TPA cross-section up to 4.24 × 10~7GM. By adjusting the electronic structures of the chromophores through introducing pentafluorobenzene or N,N-dimethyl as functional groups with different electron-donating or withdrawing behaviors, the TPA performance of the small organic molecule could be greatly enhanced. These molecular structures with push-pull systems were excellent candidates for different two-photon applications.

关键词： Star-type chromophores triphenylamine derivatives Two-photon absorption Nonlinear optical materials Push-pull systems

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Application of phenonaphthazine derivatives as hole-transporting materials for perovskite solar cells

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Journal of Energy Chemistry 2016年第4期25卷 702-708页

作者： Xueyuan Liu Fei Zhang Xicheng Liu Mengna Sun Shirong Wang Dongmei Li Qingbo Meng Xianggao Li School of Chemical Engineering and Technology Tianjin University Collaborative Innovation Center of Chemical Science and Engineering Beijing Key Laboratory for New Energy Materials and Devices Key Laboratory for Renewable Energy (CAS) Institute of Physics Chinese Academy of Sciences

Two electron-rich, solution-processable phenonaphthazine derivatives, 5,12-bis(N-[4,4'-bis-(phenyl) aminophen-4 ''-yl]}-phenonaphthazine (BPZTPA) and 5,12-bis{N-[4,4'-bis(methoxy-phenyl)aminophen-4'-phenonaphthazine (MeO-BPZTPA) have been designed and employed in the fabrication of perovskite solar cells. BPZTPA and MeO-BPZTPA exhibit excellent thermal stabilities, hole mobilities (similar to 10(-4) cm(2)/(V.s)) and suitable HOMO levels (-5.34 and-5.29 eV, respectively) relative to the valence band of the CH3NH3PbI3 and Au work function, showing their potential as alternative hole-transporting materials (HTMs). Meanwhile, the corresponding mesoporous TiO2/CH3NH3PbI3/HTM/Au devices are investigated, and the best power conversion efficiency of 10.36% has been achieved for MeO-BPZTPA without using p-type dopant. (C) 2016 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.

关键词： Perovskite solar cell Phenonaphthazine Hole-transporting material triphenylamine derivatives

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