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| 1 | A Non-Fullerene Acceptor with Chlorinated Thienyl Conjugated Side Chains for High-Performance Polymer Solar Cells via Toluene Processing显示文摘Small molecular acceptors(SMAs)BTC-2F and BTH-2F,based on heptacyclic benzodi(cyclopentadithiophene)electron-donating core(CBT)with chlorinated-thienyl conjugated and thienyl conjugated side chains,respectively,are designed and synthesized.Compared with non-chlorine acceptor BTH-2F,BTC-2F exhibits slightly blue-shifted absorption spectra,similar the lowest unoccupied molecular orbital(LUMO)(-3.91 eV);deeper highest occupied molecular orbital(HOMO)energy level and higher electron mobility than that of BTH-2F.PM6,a wide bandgap polymer,is selected as the donor material to construct bulk heterojunction polymer solar cells processed with nonhalogenated solvent toluene.The optimized PM6:BTC-2F-based device presents a 12.9%power conversion efficiency(PCE),while the PCE of PM6:BTH-2F-based device is only 11.3%.The results suggest that it is an effective strategy to optimize the photoelectric properties of SMAs by incorporating chlorine atom into the conjugated side chains. | Cuangwei Li Jingnan Wu Jin Fang Xia Guo Lei Zhu Feng Liu Maojie Zhang Yongfang Li | 2020 | Chinese Journal of Chemistry2020，38，7： | 5 |
| 2 | 15.4% Efficiency all-polymer solar cells显示文摘We report all-polymer solar cells(All-PSCs) with record-high power conversion efficiency(PCE) through tuning the molecular weights of the polymer donor(PBDB-T) to form optimal active layer morphology. By combining the polymer donors with a newly reported polymer acceptor(PJ1), an unprecedented high PCE of 15.4% and fill factor over 75% were achieved for the AllPSCs with the medium molecular weight polymer donor(PBDB-TMW), which is the highest value for All-PSCs reported so far.Detailed morphology investigation revealed that the proper phase separation in the PBDB-TMW:PJ1 blend should account for the superior device performance as PBDB-TMW exhibits appropriate miscibility with the polymer acceptor PJ1. These results demonstrated that the device performance of All-PSCs could be fully comparable to that of small molecular acceptor-based PSCs. The formation of optimized morphology via precise control of molecular weights of polymer donors and acceptors is crucial to achieve this goal. | Long Zhang Tao Jia Langheng Pan Baoqi Wu Zaiyu Wang Ke Gao Feng Liu Chunhui Duan Fei Huang Yong Cao | 2021 | Science China Chemistry2021，64，3： | 2 |
| 3 | Reducing energy loss via tuning energy levels of polymer acceptors for efficient all-polymer solar cells显示文摘The open-circuit voltage(Voc) of all-polymer solar cells(all-PSCs) is typically lower than 0.9 V even for the most efficient ones.Large energy loss is the main reason for limiting Voc and efficiency of all-PSCs. Herein, through materials design using electron deficient building blocks based on bithiophene imides, the lowest unoccupied molecular orbital(LUMO) energy levels of polymer acceptors can be effectively tuned, which resulted in a reduced energy loss induced by charge generation and recombination loss due to the suppressed charge-transfer(CT) state absorption. Despite a negligible driving force, all-PSC based on the polymer donor and acceptor combination with well-aligned energy levels exhibited efficient charge transfer and achieved an external quantum efficiency over 70% while maintaining a large Voc of 1.02 V, leading to a 9.21% efficiency. Through various spectroscopy approaches, this work sheds light on the mechanism of energy loss in all-PSCs, which paves an avenue to achieving efficient all-PSCs with large Voc and drives the further development of all-PSCs. | Huiliang Sun Bin Liu Jianwei Yu Xianshao Zou Guangye Zhang Yujie Zhang Wei Zhang Mengyao Su Qunping Fan Kun Yang Jianhua Chen He Yan Feng Gao Xugang Guo | 2020 | Science China Chemistry2020，63，12： | 2 |
| 4 | High-performance all-polymer solar cells with only 0.47 eV energy loss显示文摘The field of all-polymer solar cells(all-PSCs)has experienced rapid development during the past few years,mainly driven by the development of efficient polymer acceptors.However,the power conversion efficiencies(PCEs)of the all-PSCs are still limited by insufficient light absorption of the donor/acceptor blend and large energy loss in devices.We herein designed a polymer acceptor PYT1 constructed n-type molecular acceptor Y5-C20 as the key building block and blended it with a polymer donor PM6 to obtain an all-polymer photoactive layer.The optimized PM6:PYT1 all-PSCs achieved a record higher PCE of 13.43%with a very low energy loss of 0.47 eV and a photoresponse of up to 900 nm compared with the Y5-C20 based device with a best PCE of 9.42%.Furthermore,the PCEs of the PM6:PYT1 all-PSCs are relatively insensitive to the 1-chloronaphthalene(CN)additive contents and active layer thickness.Our results also highlight the effect of CN additive on PM6:PYT1 morphology,i.e.,charge generation,and transport find an optimized balance,and radiative and non-radiative loss is simultaneously reduced in the blend.This work promotes the development of high-performance polymer acceptors and heralds a brighter future of all-PSCs for commercial applications. | Qiang Wu Wei Wang Tao Wang Rui Sun Jing Guo Yao Wu Xuechen Jiao Christoph J.Brabec Yongfang Li Jie Min | 2020 | Science China Chemistry2020，63，10： | 2 |
| 5 | 共轭聚合物受体光伏材料和全聚合物太阳电池显示文摘全聚合物太阳电池(all-PSCs)由p-型共轭聚合物给体和n-型共轭聚合物受体共混活性层夹在ITO透明电极和金属顶电极之间所构成,除具有一般有机太阳电池器件结构简单、质量轻、可以制备成柔性和半透明器件等优点外,还具有形貌和光照稳定性好及抗弯折性能高等突出特点,最近成为有机太阳电池领域的研究热点。给体和受体光伏材料的吸收互补和能级匹配是获得高效all-PSC的关键。本文将介绍n-型共轭聚合物受体光伏材料的发展历史,重点介绍最近发展的窄带隙小分子受体高分子化的聚合物受体光伏材料,基于这类聚合物受体光伏材料的全聚合物太阳电池的能量转换效率已经超过了15%。最后对共轭聚合物受体光伏材料和全聚合物太阳电池下一步的研究方向和研究重点进行了展望。 | 李永舫 | 2021 | 高分子材料科学与工程2021，37，1： | 1 |
| 6 | 有机光电高分子材料研究热点和前沿分析显示文摘基于基本科学指标数据库(ESI)的高被引论文,通过热点文献、CiteSpace分析工具得到的热点关键词对应的文献分析,得出有机光电高分子材料主要关注点为有机太阳能电池。有机太阳能电池的研究热点为:高性能活性层材料的设计合成;高性能界面材料的设计合成及其界面调控性能的研究;电池器件中有机半导体活性层表界面的可控掺杂;有机太阳能电池活性层能量损失研究。通过高被引论文的共被引分析,关键词突变探测技术和算法对词频的变动趋势分析,得出有机光电高分子领域最新关注前沿:高效太阳能电池的制备;非富勒稀受体的研究;有机半导体材料的设计合成;结构-性能研究;加工及应用性能。有机光电高分子材料研究活跃的前沿领域:高效全聚合物太阳能电池;三元有机太阳能电池;高效的倒置型太阳能电池;超高迁移率的透明有机薄膜晶体管;高迁移率场效应晶体管;二维共轭聚合物;聚合物半导体等。有机太阳能电池研究前沿主题演化趋势:从聚噻吩给体体系--新型给体-受体体系;单层--双层--本体异质结电池结构;富勒烯受体--非富勒烯受体;高效及稳定性器件发展。本文创新性地将文献计量分析方法同文献具体内容分析相结合,通过大量的高质量文献内容分析,使得出的研究热点和前沿更具体和接近实际情况,为相关科研人员提供有益参考。 | 张杰 张元晶 张慧卿 张磊 | 2021 | 化工学报2021，72，6： | 1 |
| 7 | Propeller-shaped NI isomers of cathode interfacial material for efficient organic solar cells显示文摘Cathode interfacial materials(CIMs)stand as critical elemental in organic solar cells(OSCs),which can align energy levels,and foster ohmic contacts between the cathode and active layer of the OSCs.Nevertheless,the lagging advancement in CIMs has concurrently engendered the oversight of theoretical inquiries pertaining to the impact of molecular structure on their performance.Delving into this realm,we present two propeller-shaped isomers,4,4',4''-(benzo[1,2-b:3,4-b':5,6-b'']trithiophene-2,5,8-triyl)tris(2-(3-(dimethylamino)propyl)-1H-benzo[de]isoquinoline-1,3(2H)-dione)(3ONIN)and 6,6',6''-(benzo[1,2-b:3,4-b':5,6-b'']trithiophene-2,5,8-triyl)tris(2-(3-(dimethylamino)propyl)-1H-benzo[de]isoquinoline-1,3(2H)-dione)(3PNIN),distinguished by their molecular planarity,as a promising foundation for crafting highly efficient OSCs.This study illuminates the superiority of 3PNIN with more plane structure,exemplified by its enhanced molar extinction coefficient,deeper lowest unoccupied molecular orbital(LUMO)and highest occupied molecular orbital(HOMO)energy levels,intensified self-doping effect,heightened electron mobility,and elevated conductivity,in comparison to its counterpart,3ONIN.As a result,3PNIN and 3ONIN-treated OSC devices yield efficiencies of 17.73%and 16.82%,respectively.This finding serves as a compelling validation of the critical role played by molecular planarity in influencing CIM performance. | Hao Liu Jilei Jiang Shuixing Dai Liangmin Yu Xu Zhang Xianbiao Hou Ke Gao Heqing Jiang Minghua Huang | 2024 | Nano Research2024，17，3： | 0 |
| 8 | High Open-circuit Voltage and Low Voltage Loss in All-polymer Solar Cell with a Poly(coronenediimide-vinylene)Acceptor显示文摘Reducing the voltage loss(Vloss)is a critical factor in optimizing the open-circuit voltage(Voc)and overall power-c on version efficie ncy(PCE)of polymer solar cells.In the current work,by designing a novel electron-accepting unit of coronenediimide(CDI)and using it as the main functional building block,a new polymer acceptor CDI-V is developed and applied to fabricate all-polymer solar cells.Compared with the perylenediimide-based polymer acceptors we previously reported,the current CDI-V polymer possesses a noticeably elevated lowest unoccupied molecular orbital(LUMO).Thereby,by virtue of the enlarged energy gap between the donor HOMO and acceptor LUMO,a high Voc value of 1.05 V is achieved by the all-polymer photovolatic device,along with an impressively low Vloss of 0.55 V.As remarkably,in spite of an extremely small LUMO level offset of 0.01 eV exhibited by the donor and acceptor polymers,effective charge separation still takes place in the allpolymer device,as evidenced by a proper short-circuit current(Jsc)of 9.5 mA·cm^-2 and a decent PCE of 4.63%. | Han Han Fu-Jin Bai Rong Wei Han Yu Yi-Kun Guo He Yan Da-Hui Zhao | 2020 | Chinese Journal of Polymer Science2020，38，11： | 0 |
| 9 | Morphology control in high-efficiency all-polymer solar cells显示文摘All-polymer solar cells(All-PSCs)have attracted tremendous research interest in the recent decade due to the great potentials in stretchable electronic applications in terms of long-term stability and mechanical stretchability.Driven by the molecular design of novel polymer acceptors and morphology optimization,the power conversion efficiency(PCE)of All-PSCs has developed rapidly and now exceeded 17%.This review outlines the promising strategies for high-performance All-PSCs from the aspect of morphology control with the motivation to rationally guide the optimization.In this review,we briefly discuss the thermodynamic mixing principles of all-polymer blends and the effects of the molecular structure of conjugated polymers on thin-film morphology in All-PSCs.The crucial role of molecular miscibility in influencing morphological features and performance metrics was highlighted.We also expound on the effective methods of controlling film morphology through properly tuning the aggregation behavior of polymers.In particular,insightful studies on the commonly used naphthalene diimide-based acceptor polymers and the newly emerging polymerized nonfullerene small molecule acceptors(ITIC-series,Y6-series,etc)are discussed in detail.Finally,we present an outlook on the major challenges and the new opportunities of All-PSCs for efficiency breakthroughs targeting 20%. | Kangkang Zhou Kaihu Xian Long Ye | 2022 | InfoMat2022，4，4： | 0 |
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