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Non-conjugated terpolymer acceptors for highly efficient and stable lager-area all-polymer solar cells

Journal of Energy Chemistry 2022年第8期31卷 631-638,I0017页

作者： Jiabin Liu Jinliang Liu Jiawei Deng Bin Huang Jiyeon Oh Lin Zhao Liang Liu Changduk Yang Dong Chen Feiyan Wu Lie Chen College of Chemistry and Chemical Engineering/Institute of polymers and Energy Chemistry(IPEC) Nanchang UniversityNanchang 330031JiangxiChina Institute of Advanced Scientific Research(iASR)/Key Laboratory of Functional Organic Small Molecules for Ministry of Education Jiangxi Normal UniversityNanchang 330022JiangxiChina Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and Technology 156 Ke Jia AvenueGanzhou 341000JiangxiChina Department of Energy Engineering School of Energy and Chemical EngineeringPerovtronics Research CenterLow Dimensional Carbon Materials CenterUlsan National Institute of Science and Technology(UNIST)50 UNIST-gilUlju-gunUlsan 44919South Korea

all-polymer solar cells(all-PSCs)have made significant progress recently,but few studies have been conducted to investigate the lab-to-manufacturing translation from the spin-coating method to the printing process.Here,the random copolymerization method and non-conjugated backbone approach are integrated to manipulate the morphology and photoelectric properties of the active layer for large-area printed all-PSCs.A series of non-conjugated terpolymer acceptors PYSe-TC_(6)T(x)(x=5,10,and 20,refers to the molar ratio of TC_(6)T unit)are developed by covalently introducing non-conjugated unit TC_(6)T into the PYSe host bipolymer by random copolymerization.The spin-coated PYSe-TC_(6)T(10)-based all-PSC demonstrates the best power conversion efficiency(PCE)of 13.54%,superior to the PYSe-based one(12.45%).More intriguingly,morphological studies reveal that a combination of the random polymerization and non-conjugated backbone strategy can effectively prevent the active layer from overaggregation and improve the film quality during the printing process,thereby minimizing the efficiency and technology gap between spin-coated small-area devices and blade-coated large-area devices.By directly using the same preparation condition of spin-coating,the blade-coated small-area(0.04 cm^(2))delivers a PCE of 12.83%and the large-area(1.21 cm^(2))device achieves a PCE of 11.96%with a small PCE loss.Both PCE value and PCE loss are one of the most outstanding performances of the bladecoated all-PSCs.These findings reveal that a combination of the non-conjugated flexible backbone with random copolymerization to develop non-conjugated terpolymers is an attractive design concept to smoothly realize the lab-to-manufacturing translation.

关键词： all-polymer Non-conjugated Large area Blade-coating Lab-to-manufacturing translation

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Photomultiplication type all-polymer photodetectors with single carrier transport property

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Science China Chemistry 2019年第12期62卷 1619-1624页

作者： Jianli Miao Mingde Du Ying Fang Xiaoli Zhang Fujun Zhang Key Laboratory of Luminescence and Optical Information Ministry of EducationBeijing Jiaotong UniversityBeijing 100044China National Center for Nanoscience and Technology Beijing 100190China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China

Photomultiplication(PM)type all-polymer photodetectors(all-PPDs)are first demonstrated with the sandwich structure of ITO/PEDOT:PSS/PBDB-T:PZ1(100:x,wt/wt)/Al.The optimal PM type all-PPDs with PBDB-T:PZ1(100:3,wt/wt)as active layers exhibit external quantum efficiency(EQE)of>100%in the spectral range from 310 to 790 nm.Under 675 nm light illumination,the champion EQE value arrives to 1,470%at-20 V bias and the specific detectivity approaches 1×10^12 Jones at-10 V bias.The PM phenomenon in all-PPDs results from hole tunneling injection assisted by interfacial band bending induced by trapped electrons in PZ1 near Al electrode.The EQE values of optimal PM type all-PPDs still remained over 90%of the original value after 60 d of the storage in a high-purity nitrogen-filled glove box.

关键词： photomultiplication all-polymer photodetectors tunneling injection stability

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A chlorinated polymer promoted analogue co-donors for efficient ternary all-polymer solar cells

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Science China Chemistry 2019年第2期62卷 238-244页

作者： Hui Chen Yikun Guo Pengjie Chao Longzhu Liu Wei Chen Dahui Zhao Feng He Department of Chemistry and Shenzhen Grubbs Institute Southern University of Science and Technology Beijing National Laboratory for Molecular Sciences Center for Soft Matter Science and Engineering Key Lab of Polymer Chemistry &Physics of the Ministry of Education College of Chemistry Peking University Materials Science Division Argonne National Laboratory Institute for Molecular Engineering the University of Chicago

The efficient ternary all-polymer solar cells(PSCs) are designed and fabricated, using a polymer acceptor of NDP-V-C7 and analogue co-donors containing a chlorinated polymer PBCl T and classical PTB7-Th. PBCl T and PTB7-Th possess very similar chemical structure and matched energy levels to form the cascade of the co-donors. Meanwhile, benefiting from those analogous polymer structures, there is little influence of the morphology in blend film compared to their pristine polymer films. The binary PBCl T:NDP-V-C7 devices exhibit a high open-circuit voltage(V_(oc)) due to the deep HOMO level of PBCl T. The V_(oc)of all-PSCs could be finely manipulated by adjusting the content of PBCl T in blend film. The ternary all-PSCs have the more balanced charge mobility and prolonged carrier lifetime compared to the binary devices. The PBCl T also help improve the miscibility of ternary blend and suppress crystallization in films, bringing about favorable morphology with appropriate orientation and surface roughness in blend film. With the optimal processing, the champion ternary all-PSCs obtain a high PCE of 9.03%, which is about 10% enhancement compared to that of binary device. The results indicate that the ternary approach using analogue co-donors is a practical method to enhance the performance of all-PSCs.

关键词： all-polymer solar cells chlorination analogue codonors ternary blend carriers transport

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Perylene Diimide Based Isomeric Conjugated polymers as Efficient Electron Acceptors for all-polymer Solar Cells

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Chinese Journal of polymer Science 2019年第1期37卷 18-27,1-5页

作者： Xiao-Cheng Liu Qing-Wu Yin Zhi-Cheng Hu Zhen-Feng Wang Fei Huang Yong Cao State Key Laboratory of Luminescent Materials and Devices School of Materials Science and Engineering South China University of Technology South China Institute of Collaborative Innovation

We present here a series of perylene diimide(PDI)based isomeric conjugated polymers for the application as efficient electron acceptors in all-polymer solar cells(all-PSCs).By copolymerizing PDI monomers with 1,4-diethynylbenzene(para-linkage)and 1,3-diethynylbenzene(meta-linkage),isomeric PDI based conjugated polymers with parallel and non-parallel PDI units inside backbones were obtained.It was found that para-linked conjugated polymer(PA)showed better solubility,strongerπ-πstacking,more favorable blend morphology,and better photovoltaic performance than those of meta-linked conjugated polymers(PM)did.Device based on PTB7-Th:PA(PTB7-Th:poly{4,8-bis[5-(2-ethylhexyl)-thiophen-2-yl]benzo[1,2-b:4,5-b']dithiophene-2,6-diyl-alt-3-fluoro-2-[(2-ethylhexyl)-carbonyl]thieno[3,4-b]thiophene-4,6-diyl})showed significantly enhanced photovoltaic performance than that of PTB7-Th:MA(3.29%versus 0.92%).Moreover,the photovoltaic performance of these polymeric acceptors could be further improved via a terpolymeric strategy.By copolymerizing a small amount of meta-linkages into PA,the optimized terpolymeric acceptors enabled to enhance photovoltaic performance with improved the short-circuit current density(Jsc)and fill factor(FF),resulting in an improved power conversion efficiency(PCE)of 4.03%.

关键词： Isomeric conjugated polymers all-polymer solar cells Electron acceptors Perylene diimide

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11.2% Efficiency all-polymer solar cells with high open-circuit voltage

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Science China Chemistry 2019年第7期62卷 845-850页

作者： Yuan Meng Jingnan Wu Xia Guo Wenyan Su Lei Zhu Jin Fang Zhi-Guo Zhang Feng Liu Maojie Zhang Thomas P. Russell Yongfang Li State and Local Joint Engineering Laboratory for Novel Functional polymeric Materials Laboratory of Advanced Optoelectronic Materials College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123 China Department of Physics and Astronomy and Collaborative Innovation Center of IFSA Shanghai Jiao Tong University Shanghai 200240 China polymer Science and Engineering Department University of Massachusetts Amherst MA 01003 USA Materials Sciences Division Lawrence Berkeley National Laboratory Berkeley California 94720 USA CAS Research/Education Center for Excellence in Molecular Sciences CAS Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China

Herein,we fabricated all-polymer solar cells(all-PSCs)based on a fluorinated wide-bandgap p-type conjugated polymer PM6 as the donor,and a narrow bandgap n-type conjugated polymer PZ1 as the acceptor.In addition to the complementary absorption and matching energy levels,the optimized blend films possess high cystallinity,predominantly face-on stacking,and a suitable phase separated morphology.With this active layer,the devices exhibited a high Vocof 0.96 V,a superior Jscof 17.1 mA cm^-2,a fine fill factor(FF)of 68.2%,and thus an excellent power conversion efficiency(PCE)of 11.2%,which is the highest value reported to date for single-junction all-PSCs.Furthermore,the devices showed good storage stability.After 80 d of storage in the N2-filled glovebox,the PCE still remained over 90%of the original value.Large-area devices(1.1 cm^2)also demonstrated an outstanding performance with a PCE of 9.2%,among the highest values for the reported large-area all-PSCs.These results indicate that the PM6:PZ1 blend is a promising candidate for scale-up production of large area high-performance all-PSCs.

关键词： all-polymer solar cells fluorine substitution power conversion efficiency wide bandgap polymer polymer acceptor

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