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Random Terpolymer Based on Simple Siloxane-functionalized Thiophene Unit Enabling High-performance Non-fullerene Organic Solar Cells

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Chinese Journal of Polymer Science 2024年第3期42卷 311-321,I0006页

作者： Fuliang cheng Shiting Lai Yihan Zhang Ling Xue Xinxin Xia Peipei Zhu Xinhui Lu Xunfan Liao yiwang chen National Engineering Research Center for Carbohydrate Synthesis/Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education College of Chemistry and Chemical EngineeringJiangxi Normal UniversityNanchang 330022China Department of Physics Chinese University of Hong Kong New TerritoriesHong Kong 999077China Institute of Polymers and Energy Chemistry(IPEC)/Jiangxi Provincial Key Laboratory of New Energy Chemistry Nanchang UniversityNanchang 330031China

Incorporation of siloxane-functionalized units into polymers backbone has proven to be an efficient strategy to improve photovoltaic performance. In this work, a low-cost siloxane-containing unit was developed to construct a series of terpolymers, and the effects of siloxane on the polymer performance were systematically studied. Different contents of thiophene containing siloxane-functionalized side chain were introduced into PM6 to obtain a series of polymers(PM6, PM6-SiO-10, PM6-SiO-20 and PM6-SiO-30). The siloxane-functionalized side chains in polymers have only a slight effect on the absorption behavior and frontier molecular orbitals. However, when the siloxane content increased, the terpolymers' aggregation property decreased and the temperature-dependency increased, leading to improved donor-acceptor compatibility. The power conversion efficiency(PCE) based on PM6:Y6, PM6-SiO-20:Y6 and PM6-SiO-30:Y6 devices was 15.64%, 16.03% and 15.82%, respectively. In comparison, the active layer based on PM6-SiO-10:Y6 exhibits the most appropriate phase separation morphology, resulting in effective exciton dissociation, more balanced hole-electron transport and less recombination. Consequently, the highest PCE of 16.69% with an outstanding shortcircuit current density of 26.96 mA·cm^(-2) was obtained, which are one of the highest values for siloxane-functionalized polymer-based *** work demonstrates that finely controlling the content of siloxane-functionalized thiophene is beneficial for obtaining high-performance terpolymer donors and provides a novel and low-cost method to improve photovoltaic performance.

关键词： Organic solar cells Terpolymers Siloxane-functionalized unit Low-cost Morphology

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Disulfide-crosslinked Poly（L-glutamic acid） Grafted Mesoporous Silica Nanoparticles and Their Potential Application in Drug Delivery

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Chemical Research in Chinese Universities 2015年第5期31卷 890-894页

作者： WU Huiyong LI Jianhui WEI Junchao DAI Yanfeng PENG Zhiping chen yiwang LIU Tianxi Department of Chemistry Nanchang University Nanchang 330031 P. R. China State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Shanghai 200433 P. R. China

Poly（L-glutamic acid）（PLGA） was grafted onto the surface of mesoporous silica nanoparticles（MSN） via the ring opening polymerization of γ-benzyl-L-glutamate N-carboxyanhydride（BLG-NCA） and its subsequent deprotection of benzyl groups. The PLGA chains were cross-linked with cystamine, and thus forming a type of redox responsive drug delivery system（MSN-cPLGA）. The structures were characterized by Fourier transform infrared spectrometry（FTIR）, transmission electron microscopy（TEM） and energy disperse spectrometry（EDS）, demonstrating that disulfide groups existed on the surfaces of MSN-cPLGA particles. The thermal gravimetric analysis（TGA） results show that the PLGA mass fraction is about 33.4% in the MSN-cPLGA hybrid. The in vitro drug release experiments showed that the MSN-cPLGA hybrid can realize the controlled release of model drugs（5-fluorouracil） in response to redox environment. Even 0.1 mmol/L dithiothreitol（DTT） can accelerate the drug release speed, and a concentration of 10.0 mmol/L DTT is higher enough to trigger the open of cross-linked PLGA network so as to realize rapid release of drugs. All the results demonstrate that the cross-linked PLGA chains on the surface of MSN could act as efficient gatekeepers to control the on-off of the pores, showing potential application in drug delivery system.

关键词： Mesoporous silica nanoparticle Redox responsive Drug delivery Surface modification Hybrid

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Reducing Energy Loss and Morphology Optimization Manipulated by Molecular Geometry Engineering for Hetero-junction Organic Solar Cells

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Chinese Journal of Chemistry 2020年第12期38卷 1553-1559页

作者： Guodong Xu Huan Rao Xunfan Liao Youdi Zhang Yuming Wang Zhi Xing Ting Hu Licheng Tan Lie chen yiwang chen College of Chemistry/Institute of Polymers and Energy Chemistry(IPEC) Nanchang UniversityNonchongJiangxi 330031China Institute of Advanced Scientific Research(iASR) Jiangxi Normal University99 Ziyong AvenueNonchangJiangxi 330022China Department of Physics Chem istry and Biology(IFM) Linkoping UniversityLinkoping SE-58183Sweden

of main observation and conclusion Molecular geometry engineering is an efective strategy to control the micromorphology and molecularenergy level in organic photovoltaics(OPVs).Two novel copolymers based on alkysilyl-and chloride-functionalied benzodithiophene(BDT)were designed and synthesized for wide bandgap copolymer donor materials in *** was found that the two copolymers exhited distinctly different proper-ties in active layer when blended with fulerene-fre acceptor *** chloride-functionalited copolymer PBDTCI-TZ2 with deeper molecular energy leveland better coplanar structure induced more ordered aggregation in blend ***,the device based on PBDTC-TZ exhibits better energy alinmentwith IT-4F and smallr radiative ***,the non-radiative recombination of PBDTCI-TZ.T-4F based device is about 45 mV lowerthan the PBDTS-TZ/T-4F based device,contributing to a lower enery loss(Ein,and a higher open-cicut voltage(Vc).As a resut,the devices based onthe blend of ***-4F exhibit a high power conversion efficiency(PCE)of up to 12.2%with a high Vvoe of 0.837 Vv,higher than that of PBDTSi-TZ:IT-4F,of which the PCE is 11.2%with a Voc of 0.781V.

关键词： Molecular radiative furthermore

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Selection of Functional Spacer Cations for Efficient 2D/3D Perovskite Solar Cells

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CCS Chemistry 2023年第4期5卷 781-801页

作者： Dengxue Li Zhi Xing Xiangchuan Meng Xiaotian Hu Ting Hu yiwang chen College of Chemistry and Chemical Engineering Institute of Polymers and Energy Chemistry(IPEC)Nanchang UniversityNanchang 330031 National Engineering Research Center for Carbohydrate Synthesis Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of EducationJiangxi Normal UniversityNanchang 330022 Peking University Yangtze Delta Institute of Optoelectronics Nantong 226010 Department of Polymer Materials and Engineering School of Physics and Materials ScienceNanchang UniversityNanchang 330031

In recent years,perovskite solar cells(PSCs)have gone through unparalleled rapid expansion and become a candidate for solar *** various PSCs,though typical three-dimensional(3D)halide perovskite-based PSCs deliver the highest efficiency,they are subjected to severe instability,which constrains their *** comparison,two-dimensional(2D)PSCs have aroused widespread concern due to their superior *** that,2D/3D perovskite materials combining high efficiency and good stability have emerged as the times require,which are expected to bring about stable and efficient ***,this review focuses on selection of functional spacer cations for efficient and stable 2D/3D ***,the unique function of different spacer groups and the selection of appropriate spacer cations in 2D perovskites is summarized and ***,by selecting appropriate cations,the role of 2D perovskites is elaborated,including energy level regulation,ion migration suppression,defect passivation,residual stress release and improved *** addition,the preparation methods of 2D/3D perovskites are comprehensively ***,current challenges and future opportunities for the further development of 2D/3D perovskites for solar cells are discussed and prospected.

关键词： 2D/3D perovskites spacer cations high efficiency stability defect passivation

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DR3TBDTT Based Ternary Blends Containing Conjugated Polymers： Crystallization Determines Morphology and Performance

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Chinese Journal of Chemistry 2018年第5期36卷 437-442页

作者： Jingping Yin Weihua Zhou Qingyun Ai Xiangchuan Meng Siqi Liu Zoukangning Yu Jianrong Zeng yiwang chen College of Chemistry Nanchang University 999 Xuefu Avenue Nanchang Jiangxi 330031 China School of Materials Science and Engineering Nanchang University 999 Xuefu Avenue Nanchang Jiangxi 330031 China Shanghai Synchrotron Radiation Facility (SSRF) Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China

How the conjugated polymers affect the crystallization of DR3TBDTT, in addition to the corresponding morphology and performance, is not well understood. In this work, the weakly crystalline polymer PTB7-Th and highly crystalline polymers of PCDTBT and P3HT were incorporated into DR3TBDTT：PC71BM system to investigate the variation of crystallization, morphology and performance. It is demonstrated that PTB7-Th is the most effective additive to improve the PCE value of DR3TBDTT：PC71BM to 5.7%, showing the nucleating agent reducing the crystallization correlation length （CCL） value of DR3TBDTT from 18.7 nm to 17.0 rim, in addition to the optimized morphology. In contrast, the PCDTBT and P3HT could induce the crystallization of DR3TBDTT, leading to much higher CCL value as well as obvious phase separation. Despite of energy level alignment, the crystallization of DR3TBDTT influenced by polymers determines the corresponding morphology of active layers and photovoltaic performance.

关键词： crystallization morphology ternary blends organic solar cells

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Highly stable Al-doped ZnO by ligand-free synthesis as general thickness-insensitive interlayers for organic solar cells

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Science China Chemistry 2018年第1期61卷 127-134页

作者： Yilin Wang Zhongyou Peng Shuqin Xiao Jia Yang Huanyu Zhou Liqiang Huang Lulu Sun Yinhua Zhou Licheng Tan yiwang chen College of Chemistry Nanchang University Jiangxi Provincial Key Laboratory of New Energy Chemistry Institute of Polymers Nanchang University Wuhan National Laboratory for Optoelectronics School of Optical and Electronic Information Huazhong University of Science and Technology

Highly conductive and dispersible Al-doped ZnO(AZO) nanoparticles(NPs) have been successfully prepared by ligand-free colloidal synthesis at low temperature and stabilization by surfactant-aid including ethanolamine(EA), ethylenediamine(EDA),diethylenetriamine(DETA) and triethylenetetramine(TETA). Due to the strong intermolecular hydrogen-bonding interactions between AZO NPs and the amino groups from surfactants, the inevitable aggregation was suppressed and the surface defect sites were passivated obviously. The existence of electron transfer from the nitrogen of the amino groups to the zinc of AZO,led to a dramatic increase in electrical conductivity. A homogeneous current intensity value up to ~2200 pA for AZO tread by DETA was characterized by conductive atomic force microscopy(C-AFM), which was more superior than that of the reported sol-gel synthesized AZO with the assistance of EA surfactant(refer to 170.7 pA). Furthermore, non-fullerenes solar cells based on PBDB-T:ITIC with AZO-DETA(80 nm) yielded a best device efficiency of 10.7% and kept up prominent PCE exceeding 10%even with more thicker interlayer(95 nm).

关键词： aluminum-doped zinc oxide organic solar cells conductivity dispersibility nanoparticles

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Wide Band-gap Two-dimension Conjugated Polymer Donors with Different Amounts of Chlorine Substitution on Alkoxyphenyl Conjugated Side Chains for Non-fullerene Polymer Solar Cells

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Chinese Journal of Polymer Science 2020年第8期38卷 797-805,I0005页

作者： Youdi Zhang Yong Wang Ruijie Ma Zhenghui Luo Tao Liu So-Huei Kang He Yan Zhongyi Yuan Changduk Yang yiwang chen College of Chemistry Nanchang UniversityNanchang 330031China Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration&Reconstruction Hong Kong University of Science and Technology(HKUST)Clear Water BayKowloonHong KongChina Institute of Polymers and Energy Chemistry(IPEC) Nanchang UniversityNanchang 330037China Ulsan National Institute of Science and Technology(UNIST) UlsanRepublic of Korea Institute of Advanced Scientific Research(iASR) Jiangxi Normal UniversityNanchang 330022China

In this study,wide bandgap(WBG)two-dimensional(2D)copolymer donors(DZ1,DZ2,and DZ3)based on benzodithiophene(BDT)on alkoxyphenyl conjugated side chains without and with different amounts of chlorine atoms and difluorobenzotriazole(FBTZ)are designed and synthesized successfully for efficient non-fullerene polymer solar cells(PSCs).Three polymer donors DZ1,DZ2,and DZ3 display similar absorption spectra at 300-700 nm range with optional band-gap(Egopt)of 1.84,1.92,and 1.97 eV,*** with reported DZ1 without chlorine substitution,it is found that introducing chlorine atoms into the meta-position of the alkoxyphenyl group affords polymer possessing a deeper the highest occupied molecular orbital(HOMO)energy level,which can increase open circuit voltage(Voc)of PSCs,as well as improve hole ***-fullerene bulk heterojunction PSCs based on DZ2:MelC demonstrate a relatively high power conversion efficiency(PCE)of 10.22%with a Voc of 0.88 V,a short-circuit current density(Jsc)of 17.62 mA/cm^2,and a fill factor(FF)of 68%,compared with PSCs based on DZ1:MelC(a PCE of 8.26%)and DZ3:MelC(a PCE of 6.28%).The results imply that adjusting chlorine atom amount on alkoxyphenyl side chains based on BDT polymer donors is a promising approach of synthesizing electron-rich building block for high performance of PSCs.

关键词： Wide-bandgap copolymer Organic solar cells Polymer donors Chlorine substitution Nonfullerene polymer solar cells

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Effects of substitution and terminal groups for liquid-crystallinity enhanced luminescence of disubstituted polyacetylenes carrying chromophoric terphenyl pendants

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Science China Chemistry 2010年第6期53卷 1302-1315页

作者： ZHOU Dan,chen yiwang,chen Lie,LI Fan,NIE HuaRong & YAO Kai Institute of Polymers/Department of Chemistry,Nanchang University,Nanchang 330031,China Institute of Polymers/Department of Chemistry Nanchang University Nanchang China

Liquid-crystalline and light-emitting poly(2-alkyne)s containing terphenyl cores with hexamethyleneoxy spacers,and cyano or n-propoxy tails -[CH3C=C(CH2)6O-terphenyl-R]n-,where R=CN,CH3PA6CN,R=OCH2CH2CH3,CH3PA6OPr,were *** effects of the substitution and terminal groups on the properties,especially the mesomorphic and optical properties of the polymers,were *** disubstituted acetylene monomers (CH3A6CN,CH3A6OPr) were pre- pared through multistep reaction routes and were polymerized by WCl6-Ph4Sn in good yields (up to 82%).All the monomers and CH3PA6CN exhibited the enantiotropic SmA phase with a monolayer arrangement at elevated temperatures,whereas CH3PA6OPr formed a bilayer SmAd packing *** excitation at 330 nm,strong UV and blue emission peaks at 362 and 411 nm were observed in CH3PA6OPr and CH3PA6CN,*** luminescent properties of CH3PA6CN and CH3PA6OPr have been improved by introducing the methyl substituted group,and the quantum yield of the polymer with cyano tail CH3PA6CN (φ= 74%) was found to be higher than that of CH3PA6OPr (φ= 60%).Compared to polyacety- lene parents,both CH3PA6OPr and CH3PA6CN showed a narrower energy *** demonstrated that the electrical con- ductivities of polyacetylenes could be enhanced by attaching appropriate pendants to the conjugated polyene backbones.

关键词： disubstituted polyacetylenes liquid crystallinity phase transition photoluminescence

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Recent Progresses on Dopant-Free Organic Hole Transport Materials toward Efficient and Stable Perovskite Solar Cells

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Chinese Journal of Chemistry 2023年第22期41卷 3133-3166页

作者： Gang Xie Jintao chen Huiyu Li Jianxin Yu Haoran Yin Zhiping Wang Yaoyao Huang Chuizheng Feng Yang Pan Aihui Liang yiwang chen National Engineering Research Center for Carbohydrate Synthesis/Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education Jiangxi Normal University99Ziyang AvenueNanchangJiangxi330022China College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry(IPEC) Nanchang University99 Xuefu AvenueNanchangJiangxi330031China

As the third generation new battery,the power conversion efficiency(PCE)of metal halide perovskite solar cells(PsCs)has increased from 3.8%in 2009 to 25.8%currently certified,which fully shows that they have great research value and development *** one of the main components of high-efficiency PSCs,hole transport materials(HTMs)play an important role in extracting and transporting holes and inhibiting charge ***,commonly used HTMs require doping,and the hygroscopicity and corrosiveness of the dopants will destroy the stability of PsCs and hinder their ***,it is of great significance to develop dopant-free HTMs.

关键词： Organic hole transport materials Dopant-free Perovskite solar cells Efficient Stable

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A non-wetting and conductive polyethylene dioxothiophene hole transport layer for scalable and flexible perovskite solar cells

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Science China Chemistry 2021年第5期64卷 834-843页

作者： chenxiang Gong Lin Zhang Xiangchuan Meng Zhi Xing Li Rao Hongyu Wang Zengqi Huang Licheng Tan Ting Hu Xiaotian Hu yiwang chen College of Chemistry Nanchang UniversityNanchang 330031China Institute of Polymers and Energy Chemistry Nanchang UniversityNanchang 330031China Hunan Key Laboratory for Super Microstructure and Ultrafast Process School of Physics and ElectronicsCentral South UniversityChangsha 410083China School of Materials Science and Engineering Nanchang UniversityNanchang 330031China Institute of Advanced Scientific Research(iASR) Jiangxi Normal UniversityNanchang 330022China

The regulated crystallization of perovskite and highly repeatable preparation are decisive challenges for large-scale flexible perovskite solar cells(PSCs).Herein,we synthesize an oil-soluble poly(3,4-ethylenedioxythiophene)(Oil-PEDOT)as a hole transport layer(HTL).The non-wetting Oil-PEDOT HTL can promote the quality of large-area flexible perovskite films because of its optimized crystallinity and *** Oil-PEDOT layer also delivers desirable conductivity and charge transport without a complex ***,the flexible PSCs with Oil-PEDOT HTL achieve an efficiency of 19.51%and 16.70%based on 1.05 and 22.50 cm^(2),***,these large-scale flexible PSCs demonstrate remarkable mechanical robustness,and the efficiency exhibits 93%retention after 7,000 bending *** results show that the Oil-PEDOT is a potentially efficient HTL for fabricating efficient large-scale flexible PSCs.

关键词： non-wetting dopant-free hole transport layer flexible solar cells large-scale

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