检索结果-南通市图书馆

Inkjet printing of viscoelastic polymer inks

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2018年第3期29卷 399-404页

作者： Zhonghui Du Xinhong Yu yanchun han State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China University of the Chinese Academy of Sciences Beijing 100049 China

Inkjet printing is a new fabricating method that can realize the precise film deposition. For polymer inks, the coil-stretch transition of polymer chains always impacts the ink droplet formation and a beads-on-a string structure filament is formed, thus generating unwanted satellite droplets. This review provides a short introduction of the dynamic process of the droplet formation. Then fluid theological requirements for a printable polymer ink are summarized. Finally the strain hardening phenomenon of polymer chains in the filament formation and its impact on polymer ink-jetting are discussed. The research of viscoelastic polymer inks shows that rheological parameters and viscoelasticity are two key factors that determine the printability of polymer inks.

关键词： lnkjet printing Droplet formation Rheological properties Polymer inks Coil-stretch transition

Controlling PCBM aggregation in P3HT/PCBM film by a selective solvent vapor annealing

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2013年第22期58卷 2767-2774页

作者： SUN Yue han yanchun LIU JianGang State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of Sciences

A selective solvent vapor, i.e., cyclohexanone or isopropyl benzene, which is a poor solvent for poly(3-hexylthiophene-2,5-diyl) (P3HT) and a good solvent for fullerene derivative [6,6]-phenyl-C61-butyric acid methyl ester (PCBM), was employed to reduce the size of PCBM aggregates and prolong the formation time of big PCBM aggregates in P3HT/PCBM film. PCBM nucleates and aggregates of 10-20 nm scale form in the first few minutes annealing. Then the size of PCBM aggregates kept unchanged until annealing for 60 min. Finally, larger PCBM aggregates of micron-size formed hours later. On the contrary, the growth rate of PCBM aggregates was faster and their size was larger when treated with a good solvent vapor for both components. The P3HT crystallinity was the same with different types of annealing solvents, although the rate of P3HT self-organization was decreased after a selective solvent vapor annealing. Because of the smaller size of phase separation, the device annealed in a selective solvent vapor for 30 min had a higher PCE than that annealed in a good solvent vapor.

关键词：选择性溶剂蒸气处理聚集体退火薄膜控制富勒烯衍生物异丙基苯

Design optimized intermixed phase by tuning polymer-fullerene intercalation for free charge generation

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2019年第7期30卷 1405-1409页

作者： Qiang Zhang Jiangang Liu Xinhong Yu yanchun han State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences. Changchun 130022 China University of the Chinese Academy of Sciences Beijing 100049 China

The inte rmixed phase is important in effective charge separation due to the formation of cascaded energy landscape between intermixed phase and pure phases in polymer/fullerene solar ***,the quantitative relationship between the charge separation and the content of intermixed phase has not been investigated clearly so ***,we proposed to tune the content of the polymer/PC71BM intermixed phase by cha nging the polymer solution conformatio ***[2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene](PBTTT)and PC71 BM was selected as a model *** organization of the PBTTT in solution promotes the formation of ordered aggregates as aging time increases,the interdigitation of side-chains restricts the intercalation of PC71 ***,the intermixed phase formed by intercalation PC71 BM to PBTTT side chain can be *** the aging time increasing from 0 to 80 min,the extent of inte rcalation gradually from almost complete intercalated phase to almost *** the content of intercalated phase is about 11%,the charge dissociation is most efficie nt and short circuit current(Jsc)increased from 1.60 mA/cm2 to 4.94 mA/cm2,leading to optimized device performance.

关键词： Solution aging Intercalation Intermixed phase Three-phase morphology Polymer solar cell

n-Type D-A Conjugated Polymers: Relationship Between Microstructure and Electrical/Mechanical Performance

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2021年第5期37卷 1019-1030页

作者： LIU Xinyu YAN Ye ZhanG Qiang ZHAO Kefeng han yanchun State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130012P.R.China University of Science and Technology of China Hefei230026P.R.China

Conjugated polymers are widely applied in optoelectronic devices due to their excellent optoelectronic properties,solution processibility,and intrinsic ***-performance films could be achieved with joint efforts from both molecular structure and film solid ***,research progress of the relationship between microstructure and electrical/mechanical performance of poly{[N,N′-bis(2-octyldodecyl)-naphthalene-1,4,5,8-bis(dicarboximide)-2,6-diyl]-alt-5,5′-(2,2′bithiophene)}[P(NDI2OD-T2).

关键词： film Electrical bis

The effects of coil-stretch transition behavior of polyfluorene inks on single droplet formation during inkjet printing

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2020年第12期31卷 3216-3220页

作者： Zhonghui Du hang Zhou Weiran Cao Xinhong Yu yanchun han Shenzhen Key Lab of Thin Film Transistor and Advanced Display Peking Umiverity Sshenzhen Craduate chool Peking UniversityShenzhen 518055China Shenzhen China Star Optoelectronic Semiconductor Display Technology Co. Ltd.Shenzhen518132 China State Key Laboratory of Polymer Physics and Chermistry Changchun Iistitute of Appied ChemistryChinese Academy of Scences.Chngzchun 130022China

For drop-on-demand(DOD)inkjet printing,stable and single ink droplet fo rmation without satellite dots is the key to improve the print *** formation of stable and single droplet is influenced by filament break up and the polymer chain’s coil-stretch transition *** this paper,the droplet formation behaviors of polyfluorene(PFO)ink at various driving voltages(V),polymer chain’s coil-stretch transition mechanism and its effects on single ink droplet formation are *** indicates that when 5863 V,Wi>0.5,the PFO molecular chain is stretched because of the high hydrodynamic forces,resulting unwanted satellite *** 55

关键词： Driving voltage Polyfluorene Single droplet Satellite droplets Coil-stretch

Control of Phase Separation and Crystallization for High-Efficiency and Mechanically Deformable Organic Solar Cells

在线全文

学校读者我要写书评

暂无评论

Thickness Uniformity Adjustment of Inkjet Printed Light-emitting Polymer Films by Solvent Mixture

能源与环境材料（英文） 2023年第5期6卷 389-397页

作者： Zicheng Ding Yi Zhang Yueling Su Yin Wu yanchun han Kui Zhao Shengzhong(Frank)Liu Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationShaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi'an 710119China State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of Sciences5625 Renmin StreetChangchun 130022China Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationShaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi'an 710119China Dalian National Laboratory for Clean Energy iChEMDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China

Stretchable organic solar cells(OSCs)have great potential as power sources for the next-generation wearable *** blending rigid photovoltaic components with soft insulating materials can easily endow the mechanical ductility of active layers,the photovoltaic efficiencies usually drops in the resulting ***,a high photovoltaic efficiency of 15.03％and a large crack-onset strain of 15.70％is simultaneously achieved based on a ternary blend consisting of polymer donor poly[(2,6-(4,8-bis(5-(2-ethylhexyl-3-fluoro)thiophen-2-yl)-benzo[1,2-b:4,5-b']dithiophene))-alt-(5,5-(1',3'-di-2-thienyl-5',7'-bis(2-ethylhexyl)benzo[1',2'-c:4',5'-c']dithiophene-4,8-dione)](PM6),non-fullerene accepter 2,2'-((2Z,2'Z)-((12,13-bis(2-ethylhexyl)-3,9-diundecyl-12,13-dihydro-[1,2,5]thiadiazolo[3,4-e]thieno[2",3":4',5']thieno[2',3':4,5]pyrrolo[3,2-g]thieno[2',3':4,5]thieno[3,2-b]indole-2,10-diyl)bis(methanylylidene))bis(5,6-difluoro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile(Y6),and soft elastomer polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene(SEBS)through the control of phase separation and *** employing a high-boiling point solvent additive 1-chloronaphthalene(CN)with different solubilities for PM6 and Y6,the aggregation dynamics of PM6 and Y6 as well as the film solidification process are dramatically altered,allowing for the different molecular rearrangement and liquid-liquid phase separation ***,the ternary film with optimal CN content presents decreased SEBS domains and moderately improved molecular ordering of PM6 and Y6,enabling effective mechanical deformation and charge generation/*** revealed corrections between the film-formation process,film microstructure,and photovoltaic/mechanical characteristics in the ternary blend provide deep understanding of the morphology control toward high-performance stretchable OSCs.

关键词： film microstructure mechanical deformation molecular aggregation dynamics photovoltaic performance stretchable organic solar cells

来源：评论

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2013年第11期31卷 1449-1454页

作者： Rubo Xing Tengling Ye Yan Ding Zicheng Ding Dongge Ma yanchun han State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun Jilin 130022 China

In this paper, thickness uniformity of poly（9,9-di-n-octylfluorene） films patterned by inkjet printing was im- proved by the use of solvent mixtures （a solvent with higher volatility, higher surface energy and lower viscosity, with another solvent with lower volatility, lower surface energy and higher viscosity）. The average thickness of inkjet printed poly（9,9-di-n-octylfluorene） films was increased from ca. 30 nm to ca. 100 nm when solvent mixtures were used instead of pure chlorobenzene. More flat PFO films were formed instead of the original films with con- cave-lens like cross-section formed by coffee ring effect. This improvement was explained by combination of in- tense Marangoni flow at early drying process and weak complementary flow at the later drying process formed in the solvent mixture. Patterned poly（9,9-di-n-octylfluorene） films were used for fabrication of electroluminescence devices with improved electronic property. Array of pixels with about 80% effective light-emitting area was ob- tained.

关键词： inkjet printing solvent mixtures thickness uniformity organic light-emitting diodes marangoni flow,coffee ring effect

Crystals Array via Oriented Nucleation and Growth Induced by Smectic E Mesophase of C7-T-BTBT

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2022年第4期38卷 1041-1049页

作者： LI Hongxiang WANG Sichun LIU Xinyu WU Fan ZhanG Qiang YUAN Jian MA Wei han yanchun State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022P.R.China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei230026P.R.China State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an710049P.R.China

Long-range order crystalline thin films of organic semiconductors have attracted wide attention owing to their high charge carrier ***,uncontrolled crystal nucleation and growth during the thin film drying process cause the formation of grain boundaries,thereby limiting the long-range ***,we achieved the oriented nucleation and growth of organic semiconductors by off-centre spin-coating at the temperature of the smectic E(SmE)liquid crystal mesophase,and then followed by Ostwald ripening during solvent vapour *** thin film of 2-(5-heptylthiophen-2-yl)[1]benzothieno[3,2-b][1]benzothiophne(C7-T-BTBT)blended with 40%(mass fraction)poly(methyl methacrylate)(PMMA)was prepared by off-centrespin-coating at SmE mesophase(170°C),followed by solvent vapour annealing in chloroform for 24 h(chloroform is a good solvent for C7-T-BTBT and PMMA).The C7-T-BTBT molecules grew to rod-like crystals,which were mostly arranged parallel to each *** crystal growth was perfect and resulted in a single *** average length of the crystals was approximately 87µ***,the highest charge carrier mobility is 1.62 cm^(2)·V^(−1)·s^(−1) as against that of the film prepared at 25°C(0.06 cm^(2)·V^(−1)·s^(−1)).

关键词： 2-(5-Heptylthiophen-2-yl)benzothieno[3,2-b]benzothiophne(C7-T-BTBT) Smectic E(SmE)mesophase Crystal array

To inhibit coffee ring effect in inkjet printing of light-emitting polymer films by decreasing capillary force

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2019年第1期30卷 135-138页

作者： Xinhong Yu Rubo Xing Zhongxiang Peng Yangming Lin Zhonghui Du Junqiao Ding Lixiang Wang yanchun han State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences

Polymer thin film with uniform thickness and flat surface profile is the key point for polymer light emitting diodes(PLEDs) by inkjet printing. However, the coffee ring effect is usually observed due to the mismatch between the evaporation of the solvent and the decrease of solution volume, which promotes the formation of radial flow from the interior of the drop to the edge. In this paper, coffee ring effects of inkjet printed poly(spirobifluorene) films were proposed to be restrained by decreasing capillary force by adding co-solvent with high boiling point and high viscosity to the main solvent. The low evaporation rate of the co-solvent can reduce the driving force of the radial flow; meanwhile the high viscosity of the co-solvent can increase the resistance of the radial flow. Thus, polymer films with improve uniformity can be obtained due to the suppression of the radial flow. The device performance was greatly improved under the condition of proper film thickness and film uniformity and the maximum luminous efficiency of devices with inkjet printed poly(spirobifluorene) can reach 80% of the spin-coated devices.

关键词： Inkjet printing Coffee ring effect Polymer film Uniformity Organic light emitting diodes