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中国化学会第四届卟啉与酞菁学术研讨会

作者： Zhu,Xunjin Chen,Song Wong,Wai-Kwok Department of Chemistry Hong Kong Baptist University

Porphyrins and their derivatives have been extensive studied as photosensitizers in DSSCs and donor materials in bulk heterojunction organic solar cells(BHJ OSC) because of their excellent thermal stability,efficient light-harvesting ability,and high susceptibility in electron-transfer ***,we first reported the use of acceptor-donor-acceptor(A-D-A) structural porphyrin small molecules as donor materials in organic solar cells that facilitates delocalized π-conjugation and π-stacking in the solid state,and the large planar π-conjugation macrocycles can ensures high carrier mobility and efficient intermolecular charge transfer in the π-stacking direction.[1,2] The structural engineering with either different peripheral substitutions or various aromatic linkers on porphyrin core,can simultaneously facilitate better solubility,stronger intermolecular π-π stacking and higher charge transfer mobility in film,leading to the highest PCE of 9.50% in the conventional ***,our recent work demonstrated that the symmetrical meso-aryl substituted porphyrins can applied as hole transport materials(HTMs) in organic-inorganic hybrid perovskites solar cells(PSCs).For their suitable energy level,efficient exciton dissociation and charge transfer in HTM/perovskite films,the best power conversion efficiency of 17.78%(JSC = 22.68 mA cm,VOC = 1.099 V,FF = 71.3%) has been achieved for the zinc(II) porphyrin *** represents the highest PCE among those ever reported for porphyrin-and phthalocyanine-based HTMs in PSCs.

关键词： Porphyrin solar cells donor materials hole transport materials high efficiency

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Evaluating the photovoltaic properties of two conjugated polymers synthesized by Suzuki polycondensation and direct C–H activation

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Science China Chemistry 2015年第2期58卷 286-293页

作者： Hedi Wei Heng Lu Tao Fang Zhishan Bo Beijing Key Laboratory of Energy Conversion and Storage materials Key Laboratory of Theoretical and Computational PhotochemistryMinistry of Education College of Chemistry Beijing Normal University

Two conjugated polymers HXS-1 and PDFCDTBT were prepared by direct C–H activation and Suzuki polycondensation and their chemical structures were characterized by 1H NMR *** molecular weight of conjugated polymer synthesized by direct C–H activation is lower than the corresponding polymers prepared by Suzuki *** polymers synthesized by direct C–H activation have considerable solubility in common organic solvents and form amorphous *** photovoltaic property of conjugated polymers synthesized by direct C–H activation is inferior to the corresponding polymers synthesized by Suzuki polycondensation.

关键词： polymer solar cells Suzuki polycondensation direct C-H activation conjugated polymers donor materials

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Two star-shaped small molecule donors based on benzodithiophene unit for organic solar cells

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Chinese Chemical Letters 2022年第1期33卷 247-251页

作者： Jun Xu Jinsheng Zhang Daobin Yang Kuibao Yu Dandan Li Zihao Xia Ziyi Ge Ningbo Institute of materials Technology and Engineering Chinese Academy of SciencesNingbo 315201China Center of materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Nano Science and Technology Institute University of Science and Technology of ChinaSuzhou 215123China

Star-shaped small molecules have attracted great attention for organic solar cells(OSCs)because they have three-dimensional charge-transport characteristics,strong light absorption capacities and easily tunable energy ***,three-and four-armed star-shaped small molecule donors,namely BDT-3 Th and BDT-4 Th,respectively,have been successfully designed and synthesized,which used benzodithiophene(BDT)as the central *** two star-shaped intermediates(2 a and 2 b)could be simultaneously obtained by one-step of Suzuki coupling,and 1,2-dimethoxyethane played a key role in the Suzuki *** of them have excellent thermal stability,good solubility and broad ***-armed BDT-4 Th shows a slightly higher extinction coefficient,a deeper HOMO energy level and an obviously better phase separation morphology when blended with Y6 than three-armed BDT-3 *** a result,increased power conversion efficiency(PCE)of 5.83%is obtained in the BDT-4 Th:Y6-based OSC devices,which is obviously higher than that of the BDT-3 Th:Y6-based devices(PCE=3.78%).To the best of our knowledge,this is the highest PCE among the BDT-based star-shaped donors-based *** result provides an effective strategy to obtain star-shaped small molecule donor materials for high efficient organic solar cells.

关键词： Star-shaped molecules Benzodithiophene Suzuki coupling donor materials Small molecules Organic solar cells

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Polymer Solar Cells Based on the Copolymers of Naphtho[1,2-c：5,6-c]bis（1,2,5-thiadiazole） and Alkoxylphenyl Substituted Benzodithiophene with High Open-Circuit Voltages

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Chinese Journal of Chemistry 2015年第8期33卷 902-908页

作者： Liqian Liu Guichuan Zhang Baitian He Fei Huang Institute of Polymer Optoelectronie materials and Devices State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou Guangdong 510640 China

Two novel naphtho[1,2-c：5,6-c]bis（1,2,5-thiadiazole） and alkoxylphenyl substituted benzodithiophene based copolymers were developed as the donor materials for polymer solar cells. The resulting copolymers exhibit broad absorption bands in the range of 500--800 nm in thin films and deep highest occupied molecular orbital energy levels of-5.39 eV and -5.36 eV, respectively. The best device performance was achieved by PI, with an open-circuit voltage of 0.85 V, a short-circuit current density of 8.65 mA·cm^-2, a fill factor of 37.8%, and a power conversion efficiency of 2.78%.

关键词： polymer solar cells donor materials alkoxylphenyl substituted naphtho[1,2-c:5,6-c]bis(1,2,5-thiadiazole)

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