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Chinese Journal of Chemistry 2023年第17期41卷 2143-2150页

作者： Hongxin Tao Changquan Tang Yunlong Ma Shu-Quan Zhang Ruochuan Liao Qisheng Tu qingdong zheng State Key Laboratory of Structure Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of Sciences155 Yangqiao West RoadFuzhouFujian 350002China State Key Laboratory of Coordination Chemistry College of Engineering and Applied SciencesNanjing UniversityNanjingJiangsu 210023China University of Chinese Academy of Sciences Beijing 100049China Collegeof ZhichengFuzhou UniversityFuzhouFujian 350002China

Comprehensive Summary,The development of novel building blocks with sp3-hybridized-carbon-free conjugated skeletons is important to further advance and enrich nonfullerene acceptors(NFAs),but this remains a challenge due to the lack of strategies to effectively modulate the aggregation behavior of resulting NFAs.Herein,two novel nitrogen-bridged octacyclic ladder-type heteroarenes end-capped with thiophene rings(BTPS)or selenophene rings(BTPSe)are designed and synthesized as the donor cores for constructing NFAs(MQX-2 and MQX-4).It is found that replacing the sulfur atoms(MQX-2)at the outer positions of the heteroarene core with selenium atoms(MQX-4)can effectively modulate the molecular packing mode of the NFAs.The incorporation of selenium atoms induces stronger O···Se noncovalent interaction than O···S,thus promoting the formation of mixed H/J-type aggregates in MQX-4.Benefiting from more electron hopping channels,MQX-4 exhibits higher electron transport(more than 1-fold enhancement)and photovoltaic properties compared to MQX-2,which forms only H-type aggregates.

关键词： Polymer solar cells Electron acceptors Noncovalent interactions Molecular packing Electron transport

Enhancing the Intermolecular Interactions of Ladder-Type Heteroheptacene-Based Nonfullerene Acceptors for Efficient Polymer Solar Cells by Incorporating Asymmetric Side Chains

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CCS Chemistry 2023年第2期5卷 455-468页

作者： Qisheng Tu Wenjun zheng Yunlong Ma Ming Zhang Zhijian Li Dongdong Cai Pan Yin Jinyun Wang Shan-Ci Chen Feng Liu qingdong zheng State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002 University of Chinese Academy of Sciences Beijing 100049 Frontiers Science Center for Transformative Molecules and In-Situ Center for Physical Scienceand the Center of Hydrogen ScienceSchool of Chemistry and Chemical EngineeringShanghai Jiao Tong UniversityShanghai 200240

Asymmetric nonfullerene acceptors(NFAs)possess larger dipole moments and stronger intermolecular bonding energy than their symmetric counterparts thereby making them promising candidates for high-performance polymer solar cells(PSCs).Herein,we report twoefficient acceptor–donor–acceptor(A–D–A)type NFAs(M14 and M18)with asymmetric side chains that show enhanced intermolecular interactions compared with their corresponding counterparts(M17 and M19)based on symmetric side chains.Furthermore,M14 and M18 exhibit elevated lowest unoccupiedmolecular orbitals and smallerπ–πstacking distances in comparison with M17 and M19,respectively.In combination with the benchmark polymer donor of PM6,the PM6:M14 blend affords superior charge transport properties,and more importantly,an increased power conversion efficiency(PCE)of 15.49%in comparison with the M17-based counterpart(13.01%PCE).Similarly,the asymmetric M18-based blend also shows a higher PCE of 13.00%than the M19-based blend(11.55%).Through further interface engineering,the bestperforming M14-based device delivers an enhanced PCE of 16.46%,which represents a record value among all asymmetric A–D–A type NFAs.Our results provide new insights into the design of asymmetric NFAs with enhanced intermolecular interactions for highperformance PSCs.

关键词： heteroheptacene nonfullerene acceptors asymmetric side chains intermolecular interactions polymer solar cells

Defect passivation of CsPbI2Br perovskites through Zn（Ⅱ） doping:toward efficient and stable solar cells

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Science China Chemistry 2019年第8期62卷 1044-1050页

作者： Jiajun Lu Shan-Ci Chen qingdong zheng State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of Sciences Beijing 100049China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai 200050China

Defect passivation is an important strategy to achieve perovskite solar cells(PVSCs) with enhanced power conversion efficiencies(PCEs) and improved stability because the trap states induced by defects in the interfaces and grain boundaries of perovskites are harmful to both large open circuit voltage and high photocurrent of devices. Here, zinc cations(Zn^2+) were used as a dopant to passivate defects of the CsPbI2Br perovskite leading to Zn^2+-doped CsPbI2Br film with fewer trap states, improved charge transportation, and enhanced light-harvesting ability. Thus, the best-performance PVSC based on CsPbI2 Br with the optimal Zn^2+doping shows a higher PCE of 12.16% with a larger open-circuit voltage(VOC) of 1.236 V, an improved shortcircuit current(JSC) of 15.61 mA cm^-2 in comparison with the control device based on the pure CsPbI2Br which exhibits a PCE of 10.21% with a VOCof 1.123 V, a JSCof 13.27 mA cm^-2. Time-resolved photoluminescence results show that the Zn^2+doping leads to perovskite film with extended photoluminescence lifetime which means a longer diffusion length and subsequently enhanced photocurrent and open circuit voltage. This work provides a simple strategy to boost the performance of PVSCs through Zn^2+doping.

关键词： CsPbI2Br perovskites defect passivation Zn(Ⅱ) doping all-inorganic perovskite solar cells power conversion efficiency

Impact of regio-isomeric monochlorinated end groups on packing mode,miscibility,and photovoltaic performance of asymmetric selenophene-fused M-series acceptors

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Chinese Chemical Letters 2023年第12期34卷 251-256页

作者： Ruochuan Liao Changquan Tang Yunlong Ma qingdong zheng State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China State Key Laboratory of Coordination Chemistry College of Engineering and Applied SciencesNanjing UniversityNanjing 210023China University of ChineseAcademyof Sciences Beijing 100049China

Optimal bulk-heterojunction(BHJ)morphology is crucial for efficient charge transport and good photovoltaic performance in organic solar cells(OSCs).Yet,the correlation between chemical structures of nonfullerene acceptors(NFAs)and molecular interaction in the BHJ blends remains opaque.Herein,we study three isomeric NFAs referred to as MQ1-x(x=β,y,or 8)that shared an asymmetric selenophene-fused heteroheptacene backbone end-capped by two monochlorinated end groups.Remarkably,miscibility between the polymer donor of PM6 and MQ1-x successively elevates as the chlorine atoms move fromβ-,to y-,to 8-position of terminals.Combined with the varied molecular crystallinity of these NFAs,diverse BHJ morphologies are observed in their blend films.As a result,the MQ1-8-based devices present the highest PCE of 12.08%owing to the efficient charge dissociation and transport induced by the compact molecular packing and optimal BHJ morphology.Our investigation provides a new insight in the material design that has a good balance in molecular packing and film morphology for high-performance OSCs.

关键词： Organic solar cells Miscibility Noncovalent interaction Chlorinated isomers Molecular packing

Control over π-π stacking of heteroheptacene-based nonfullerene acceptors for 16% efficiency polymer solar cells

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National Science Review 2020年第12期7卷 1886-1895页

作者： Yunlong Ma Dongdong Cai Shuo Wan Pan Yin Pengsong Wang Wenyuan Lin qingdong zheng State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of Sciences University of Chinese Academy of Sciences College of Chemistry Fuzhou University

Nonfullerene acceptors are being investigated for use in polymer solar cells(PSCs),with their advantages of extending the absorption range,reducing the energy loss and therefore enhancing the power conversion efficiency(PCE).However,to further boost the PCE,mobilities of these nonfullerene acceptors should be improved.For nonfullerene acceptors,the π–π stacking distance between cofacially stacked molecules significantly affects their mobility.Here,we demonstrate a strategy to increase the mobility of heteroheptacene-based nonfullerene acceptors by reducing their π–π stacking distances via control over the bulkiness of lateral side chains.Incorporation of 2-butyloctyl substituents into the nonfullerene acceptor(M36) leads to an increased mobility with a reduced π–π stacking distance of 3.45 ?.Consequently,M36 affords an enhanced PCE of 16%,which is the highest among all acceptor-donor-acceptor-type nonfullerene acceptors to date.This strategy of control over the bulkiness of side chains on nonfullerene acceptors should aid the development of more efficient PSCs.

关键词： polymer solar cell power conversion efficiency nonfullerene acceptor ladder‐type heteroheptacene π–π stacking charge carrier mobility

Solution-derived poly（ethylene glycol）-TiOx nanocom- posite film as a universal cathode buffer layer for enhancing efficiency and stability of polymer solar cells

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Nano Research 2015年第2期8卷 456-468页

作者： Zhigang Yin qingdong zheng Shan-Ci Chen Jiaxin Li Dongdong Cai Yunlong Ma Jiajun Wei State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 China University of Chinese Academy of Sciences Beijing 100049 China

高度有效、稳定的聚合物太阳能电池( PSC )被 poly 采用导出答案的混血儿制作了(乙烯乙二醇)钛氧化物( PEG-TiO 一篇小说和通用阴极缓冲层( CBL )的 x ) nanocomposite 电影，它罐头极大地由减少接口精力障碍并且提高费用抽取/收集改进... 详细信息

高度有效、稳定的聚合物太阳能电池( PSC )被 poly 采用导出答案的混血儿制作了(乙烯乙二醇)钛氧化物( PEG-TiO 一篇小说和通用阴极缓冲层( CBL )的 x ) nanocomposite 电影，它罐头极大地由减少接口精力障碍并且提高费用抽取/收集改进设备性能。有改变的体积异质接面(BHJ ) 的转换 PSC 的性能基于这混合 nanocomposite CBL 被发现比有纯 TiO 的控制设备的那些好一些 x CBL 或没有 CBL。在 AM 1.5G 照耀下面的优秀力量变换效率直到 9.05%(100 mW 污獹獩 ? 潭敬畣慬? 楳癥? 慣慴祬楳?愠摮瀠潨潴慣慴祬楳？

关键词：纳米复合材料复合材料薄膜太阳能电池缓冲层乙二醇聚合物稳定性阴极

Revealing the spacing effect of neighboring side-chains in modulating molecular aggregation and orientation of M-series acceptors

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聚集体(英文)

聚集体(英文) 2023年第4期4卷 166-176页

作者： Yunlong Ma Shaoxin Luan Dongdong Cai Shu-Quan Zhang Jin-Yun Wang Qisheng Tu Yuhang Zhu qingdong zheng State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouChina College of Chemistry and Materials Science Fujian Normal UniversityFuzhouChina College of Zhicheng Fuzhou UniversityFuzhouChina State Key Laboratory of Coordination Chemistry College of Engineering and Applied SciencesNanjing UniversityNanjingChina

Controlling the aggregation of small-molecule acceptors(SMAs)is essential to obtain an optimal morphology and to improve the photovoltaic performance of polymer solar cells(PSCs).However,reducing intermolecular aggregation of SMAs is usually accompanied by the disruption of compact molecular packing thereby leading to their decreased electron mobilities.Here,two novel M-series SMAs(MD1T and MD2T)based on ladder-type heterononacenes with neighboring side-chains separated by one or two thiophene rings are designed and synthesized.It is found that shortening the spacing of the neighboring side-chains of the SMAs can greatly alleviate the intermolecular aggregation and alter the molecular orientation from bimodal edge-on/face-on to predominant face-on while maintaining the compact molecular packing.As a result,a more favorable morphology with smaller domain sizes is formed for the MD1T-based blend films,which greatly improves the charge generation and charge transport for the corresponding PSCs.The best-performing MD1T-based device affords an efficiency of 12.43%,over seven times higher than that of the MD2T-based device.This work reveals the importance of the spacing between the neighboring side-chains in modulating the molecular aggregation and active layer morphology,and the obtained structure-performance relationships shall provide important guidance for designing highly efficient SMAs.

关键词： aggregation molecular orientation neighboring side-chains polymer solar cells small-molecule acceptors

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兰科植物与共生真菌互作关系的研究进展

分子植物育种 2024年第8期22卷 2778-2784页

作者：谢泰祥郑清冬王艺兰琳英徐艳芳欧悦姚亚合艾叶福建农林大学园林学院兰科植物保护与利用国家林业与草原局重点实验室福州350002

兰科植物的种子细小,是所有被子植物中最小种子类型之一,只具备一种不被胚乳包围且小而不发达的胚,在其生命周期的整个过程中,特别是在营养资源匮乏的早期阶段,对共生真菌的依赖性非常强。共生真菌与兰科植物形成菌根联合共生体为种子... 详细信息

兰科植物的种子细小,是所有被子植物中最小种子类型之一,只具备一种不被胚乳包围且小而不发达的胚,在其生命周期的整个过程中,特别是在营养资源匮乏的早期阶段,对共生真菌的依赖性非常强。共生真菌与兰科植物形成菌根联合共生体为种子萌发、原球茎生长发育、幼苗分化以及成年植株生殖生长提供所需的营养物质。本研究对兰科植物共生真菌的研究历程与概况、菌根互作关系、多样性与专一性、促生作用以及应用前景等方面进行了综述,并在此基础上进行展望,以期为兰科植物野生资源保育与开发、人工栽培生产以及生防菌与菌肥研发等研究提供参考。

关键词：兰科植物共生真菌多样性与专一性促生作用

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间伐套种对马尾松林植物保育功能的影响

福建林业科技 2024年第1期51卷 41-48页

作者：方栋龙高伟林国江龚伟勇郑兆飞李渊顺郑清东福建林业职业技术学院林学系福建南平353000 福建林业职业技术学院森林生态与碳汇计量研究所福建南平353000 安溪丰田国有林场福建泉州362400 南平市林业局福建南平353000 福建农林大学林学院福建福州350001

2023年在福建省安溪丰田国有林场,以马尾松林分高强度间伐(间伐强度70%)后套种不同阔叶树种6 a后的林分为研究对象,研究2种套种模式对马尾松林分植物保育功能的影响。结果表明:(1)间伐套种红锥(Castanopsis hystrix)+福建柏(Fokienia ho... 详细信息

2023年在福建省安溪丰田国有林场,以马尾松林分高强度间伐(间伐强度70%)后套种不同阔叶树种6 a后的林分为研究对象,研究2种套种模式对马尾松林分植物保育功能的影响。结果表明:(1)间伐套种红锥(Castanopsis hystrix)+福建柏(Fokienia hodginsii)和间伐套种醉香含笑(Michelia macclurei)+枫香(Liquidambar formosana)2种模式均不同程度地提高了林分各层次的植物物种数和个体数,且有效促进林下灌木植物向乔木层的更新发展。其中以间伐套种醉香含笑+枫香模式中林下物种数和个体数最多,物种丰富度和多样性也均处于较高水平。(2)2种套种模式均促进马尾松林的生长,以套种福建柏+红锥模式中马尾松林的树高、胸径和单株生物量最高。(3)不同套种树种生长差异显著,醉香含笑和红锥的树高、胸径和单株生物量显著高于福建柏和枫香。综上,马尾松林分高强度间伐后,套种醉香含笑和红锥是较佳选择。

关键词：马尾松间伐套种植物多样性

Ladder-type Diindenopyrazine Based Conjugated Copolymers for Organic Solar Cells with High Open-circuit Voltages

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Chinese Journal of Chemistry 2013年第11期31卷 1409-1417页

作者： Shanci Chen Changquan Tang Zhigang Yin Yunlong Ma Dongdong Cai Dhanavel Ganeshan qingdong zheng State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 China

A ladder-type diindenopyrazine （IPY） was synthesized and used as a building block for constructing conjugated copolymers. Three copolymers based on the IPY moiety were obtained via the Suzuki coupling reaction with dif- ferent monomers, including 4,7-dithien-2-yl-2,1,3-benzothiadiazole （DBT）, 5,8-dithien-2-yl-2,3-diphenylquinoxa- line （DTQ）, and 5,8-dithien-2-yl-2,3-di（4-fluorophenyl）quinoxaline （DFTQ）. The obtained polymers were charac- terized by 1H NMR spectroscopy, UV-Vis absorption spectroscopy, cyclic voltammetry, and gel permeation chro- matography （GPC）. Owing to the four solubilizing alkyl chains on the IPY unit, all the three copolymers have good solubility in common solvents. These polymers have deep-lying HOMO energy levels in the range of-5.55-5.60 eV, and exhibit field-effect mobilities as high as 0.006 cm2.V-l.s i. Photovoltaic applications of these polymers as light-harvesting and hole-conducting materials were investigated in conjunction with [6,6]-phenyl-C6rbutyric acid methyl ester （PC61BM）. Both conventional and inverted devices were fabricated based on these three polymers. A power conversion efficiency （PCE） of 2.53% and a high open-circuit voltage of 1.00 V were obtained under simu- lated solar light AM 1.5 G （100 mW/cm2） from an inverted solar cell with an active layer containing 25 wt% lad- der-type IPY containing copolymer （PIPYDTQ） and 75 wt% PC61BM. Moreover, a high open-circuit voltage of 1.02 V and a PCE of 2.40% were achieved from a conventional solar cell based on PIPYDTQ.

关键词： conjugated polymers diindenopyrazine organic solar cells field-effect transistors open-circuit volt-age