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| 1 | Study on electrical property of polyaniline composite film显示文摘 | Zhang Qinghua Jin Huifen Jing Xiabin Geng Yanhou | 1998 | Journal of China Textile University (Eng Ed)1998，15，2： | 1 |
| 2 | Calculation aided miscibility manipulation enables highly efficient polythiophene:nonfullerene photovoltaic cells显示文摘Polythiophenes,with merits of low cost and high scalability of synthesis,have received growing interest in organic solar cells.To date,the best-performing polythiophene:nonfullerene solar cells exhibit typical power conversion efficiencies (PCEs) of 10%–12%,which is much lower than those employing PM6-and D18-type polymers.This inferior performance is mostly limited by the improper miscibility between polythiophene and acceptors.Efforts on engineering the molecular structure to systematically tune the miscibility are required.With the aid of group contribution calculations,the miscibility of polythiophene:nonfullerene blend system was finely tuned by varying the ratios of siloxane-terminated chains and alkyl chains in ester-substituted polythiophenes through random copolymerization.Based on a series of the polythiophene and nonfullerene acceptors,the detailed analysis of blend miscibility and performance reveals a surprising anticorrelation between the Flory-Huggins interaction parameter (χ_(aa)) and the optimal time of solvent vapor annealing for device performance across these systems.Primarily due to the slightly higher χ_(aa),the blend of PDCBT-Cl-Si5 and ITIC-Th1 results in a record-high PCE of 12.85%in polythiophene:nonfullerene solar cells.The results not only provide a calculation-guided approach for molecular design but also prove that precise control of the miscibility is an effective way to design high-performance polythiophene:nonfullerene blends and beyond. | Qi Wang Miaomiao Li Zhongxiang Peng Nigel Kirby Yunfeng Deng Long Ye Yanhou Geng | 2021 | Science China Chemistry2021，64，3： | 1 |
| 3 | Transport property of polyaniline and its molecular weight dependence显示文摘 | Yanhou Geng Ji Li Xiabin Jing Fosong Wang Zhenxing Liu Meixiang Wan | 1998 | Science in China Series B: Chemistry1998，，4： | 1 |
| 4 | Enhanced n-Type Thermoelectric Performance of Conjugated Polymers Based on an Indandione-Terminated Quinoidal Unit through Comonomer Optimization显示文摘Comprehensive Summary Conjugated polymers(CPs)containing quinoidal units are promising in n-type organic thermoelectric materials because of their deep-positioned lowest unoccupied molecular orbital(LUMO)energy levels and planar conjugated backbones.Herein,three CPs have been synthesized by copolymerizing an indandione-terminated quinoidal unit with bithiophene derivatives.Owning to the high electron affinity of the indandione-terminated quinoidal unit,all polymers showed deep LUMO energy levels below-4.10 eV.Incorporating electron-withdrawing substituents(F or CN)on the bithiophene comonomer can further downshift the LUMO energy levels.As a result,a more efficient n-doping process can be realized when employing 4-(2,3-dihydro-1,3-dimethyl-1H-benzimidazol-2-yl)-N,N-dimethylbenzenamine(N-DMBI)as the dopant.Ultimately,the polymer with CN substituents delivered the best thermoelectric performance with a power factor of up to 2.14μW·m^(−1)·K^(−2),because it possessed the lowest LUMO energy level among the three CPs.This work highlights that the modulation of LUMO energy level is an effective strategy to optimize the thermoelectric performance of CPs. | Tian Du Yingying Liu Yunfeng Deng Yanhou Geng | 2023 | Chinese Journal of Chemistry2023，41，7： | 1 |
| 5 | Glassy nematic conjugated oligomers:Materials for organic light-emitting diodes显示文摘 | Chen Andrew C A0 Culligan Scan Geng Yanhou | 2004 | Liquid Crystals2004，8，： | 1 |
| 6 | Starburst substituted hexaazatriphenylene compounds: synthesis, photophysical and electrochemical properties显示文摘 | Baoxiang Gao Yueling Liu Yanhou Geng Yanxiang Cheng Lixiang Wang Xiabin Jing Fosong Wang | 2009 | Tetrahedron Letters2009，，14： | 1 |
| 7 | Simultaneous Optimization of Efficiency,Stretchability,and Stability in All-Polymer Solar Cells via Aggregation Control显示文摘With the emergence of Y-series small molecule acceptors,polymerizing the small molecule acceptors with aromatic linker units has attracted significant research attention,which has greatly advanced the photovoltaic performance of all-polymer solar cells.Despite the rapid increase in efficiency,the unique characteristics(e.g.,mechanical stretchability and flexibility)of all-polymer systems were still not thoroughly explored.In this work,we demonstrate an effective approach to simultaneously improve device performance,stability,and mechanical robustness of all-polymer solar cells by properly suppressing the aggregation and crystallization behaviors of polymerized Y-series acceptors.Strikingly,when introducing 50 wt%PYF-IT(a fluorinated version of PY-IT)into the well-known PM6:PY-IT system,the all-polymer devices delivered an impressive photovoltaic efficiency of 16.6%,significantly higher than that of the control binary cell(15.0%).Compared with the two binary systems,the optimal ternary blend exhibits more efficient charge separation and balanced charge transport accompanying with less recombination.Moreover,a high-performance 1.0 cm^(2)large-area device of 15%efficiency was demonstrated for the optimized ternary all-polymer blend,which offered a desirable PCE of 14.5%on flexible substrates and improved mechanical flexibility after bending 1000 cycles.Notably,these are among the best results for 1.0 cm^(2)all-polymer OPVs thus far.This work also heralds a bright future of all-polymer systems for flexible wearable energy-harvesting applications. | Kaihu Xian Kangkang Zhou Mingfei Li Junwei Liu Yaowen Zhang Tao Zhang Yong Cui Wenchao Zhao Chunming Yang Jianhui Hou Yanhou Geng Long Ye | 2023 | Chinese Journal of Chemistry2023，41，2： | 1 |
| 8 | Polyaniline doped with macromolecular acid显示文摘 | Geng Yanhou Li Ji Jing Xiabin | 1997 | Synth Met1997，84，： | 1 |
| 9 | 显示文摘 | Chen Andrew C A Culligan Scan Geng Yanhou | 2004 | Liquid Crystals2004，8，： | 1 |
| 10 | Spiro-linked ter-, penta-, and heptafluorenes as novel amorphous materials for blue light emission显示文摘 | Katsis D Geng Yanhou Ou J J et a l | 2002 | Chem Mater2002，14，3： | 1 |
| 11 | Refining acceptor aggregation in nonfullerene organic solar cells to achieve high efficiency and superior thermal stability显示文摘With the rapid increase in photoelectric conversion efficiency of organic photovoltaics(OPVs),prolonging the operational lifetime of devices becomes one of the critical prerequisites for commercial applications.Guided by the theoretical calculations of molecular stacking and miscibility,we proposed an effective approach to simultaneously improve device performance and thermal stability of high-efficiency OPVs by refining the aggregation of Y-series acceptors.The key to this approach is deliberately designing an asymmetric Y-series acceptor,named Y6-CNO,which acts as a third component regulator to finely tune the degree of acceptor aggregation and crystallization in the benchmark PM6:Y6-BO system.Strikingly,a champion photovoltaic efficiency of 18.0%was achieved by introducing 15 wt%Y6-CNO into the PM6:Y6-BO system,significantly higher than the control binary cell(16.7%).Moreover,annealing at 100°C for over 1,200 h does not markedly affect the photovoltaic performance of the optimal ternary devices,maintaining above 95%of the initial performance and exhibiting an exceptionally high T_(80)lifetime of 9,000 h under continuous thermal annealing.By contrast,binary devices suffer from excessive crystallization of acceptors with long-term annealing.Additionally,mixing thermodynamics combined with morphological characterizations were employed to elucidate the microstructure-thermal stability relationships.The ternary OPVs consisting of symmetric and asymmetric homologous acceptors form better charge transport channels and can effectively suppress excessive aggregation of acceptors under long-term annealing.This work demonstrates the effectiveness of refining acceptor aggregation via molecular design for highly efficient and stable nonfullerene-based OPVs. | Kaihu Xian Shengnan Zhang Ye Xu Junwei Liu Kangkang Zhou Zhongxiang Peng Mingfei Li Wenchao Zhao Yu Chen Zhuping Fei Jianhui Hou Yanhou Geng Long Ye | 2023 | Science China Chemistry2023，66，1： | 0 |
| 12 | 8.30%Efficiency P3HT-based all-polymer solar cells enabled by a miscible polymer acceptor with high energy levels and efficient electron transport显示文摘P3HT stands out from numerous polymer donors owing to the merits of low cost and high scalability of synthesis.However,the photovoltaic performance of P3HT-based blends lags significantly behind the state-of-the-art systems,especially for all-polymer solar cells(APSCs) that generally show efficiency of around 3%–4% due to the lack of matched polymer acceptors.Herein,a polymer acceptor,named IDTBTC8-CN,was designed and synthesized with indacenodithiophene(IDT) and mono-cyano(CN)-substituted benzothiadiazole(BT-CN) as building blocks.Introducing a CN group endowed the polymer with decreased bandgap,and apparent n-type charge transport character despite the relatively high energy levels.Additionally,IDTBTC8-CN showed largely improved miscibility with P3HT,compared with that of BT-based control polymer IDTBTC8.The high miscibility between P3HT and IDTBTC8-CN as well as the amorphous aggregation behavior of IDTBTC8-CN enabled a broad manipulation room for the blend film to acquire favorable morphology.Eventually,a champion efficiency of 8.30% was achieved,in sharp contrast to that of the IDTBTC8-based system(1.21%).Such efficiency is a new record for P3HT-based APSCs reported so far.Moreover,P3HT:IDTBTC8-CN blend film also exhibited excellent mechanical robustness.This study implies the guidance of molecular design of the polymer acceptors and morphology control for P3HT-based APSCs. | Ziqi Liang Jiangting He Bin Zhao Mengyuan Gao Yu Chen Long Ye Miaomiao Li Yanhou Geng | 2023 | Science China Chemistry2023，66，1： | 0 |
| 13 | Dithienocarbazole- and benzothiadiazole-based donor-acceptor conjugated polymers for bulk heterojunction polymer solar cells显示文摘Donor-acceptor(D-A)-conjugated polymers P(BT-C1)and P(BT-C2),with dithieno[2,3-b;7,6-b]carbazole(C1)or dithieno[3,2-b;6,7-b]carbazole(C2)as D-unit and benzothiadiazole(BT)as A-unit,were synthesized.The optical bandgaps of the polymers are similar(1.84 and 1.88 e V,respectively).The structures of donor units noticeably influence the energy levels and backbone curvature of the polymers.P(BT-C1)shows a large backbone curvature;its highest occupied molecular orbital(HOMO)energy level is 5.18 e V,whereas P(BT-C2)displays a pseudo-straight backbone and has a HOMO energy level of 5.37 e V.The hole mobilities of the polymers without thermal annealing are 1.9×10 3 and 2.7×10 3 cm2 V 1 s 1 for P(BT-C1)and P(BT-C2),respectively,as measured by organic thin-film transistors(OTFTs).Polymer solar cells using P(BT-C1)and P(BT-C2)as the donor and phenyl-C71-butyric acid methyl ester(PC71BM)as the acceptor were fabricated.Power conversion efficiencies(PCEs)of 4.9%and 5.0%were achieved for P(BT-C1)and P(BT-C2),respectively.The devices based on P(BT-C2)exhibited a higher Voc due to the deeper HOMO level of the polymer,which led to a slightly higher PCE. | Ziqing Rong Yunfeng Deng Zhiyuan Xie Yanhou Geng Fosong Wang | 2015 | Science China Chemistry2015，58，2： | 0 |
| 14 | Polymer: Non-fullerene acceptor heterojunction-based phototransistor for short-wave infrared photodetection显示文摘It remains full of challenge for extending short-wave infrared(SWIR)spectral response and weak-light detection in the context of broad spectral responses for phototransistor.In this work,a novel poly(2,5-bis(4-hexyldodecyl)-2,5-dihydro-3,6-di-2-thienyl-pyrrolo[3,4-c]pyrrole-1,4-dione-alt-thiophene)(PDPPT3-HDO):COTIC-4F organic bulk-heterojunction is prepared as active layer for bulk heterojunction phototransistors.PDPPT3-HDO serves as a hole transport material,while COTIC-4F enhances the absorption of SWIR light to 1020 nm.As a result,smooth and connected PDPPT3-HDO film is fabricated by blade coating method and exhibits high hole mobility up to 2.34 cm^(2)·V^(-1)·s^(-1) with a current on/off ratio of 4.72×10^(5) in organic thin film transistors.PDPPT3-HDO:COTIC-4F heterojunction phototransistors exhibit high responsivity of 2680 A·W^(-1) to 900 nm and 815 A·W^(-1) to 1020 nm,with fast response time(rise time~20 ms and fall time~100 ms).The photosensitivity of the heterojunction phototransistor improves as the mass ratio of non-fullerene acceptors increases,resulting in an approximately two orders of magnitude enhancement compared to the bare polymer phototransistor.Importantly,the phototransistor exhibits decent responsivity even under ultra-weak light power of 43μW·cm^(-2) to 1020 nm.This work represents a highly effective and general strategy for fabricating efficient and sensitive SWIR light photodetectors. | Jing Li Weigang Zhu Yang Han Yanhou Geng Wenping Hu | 2024 | Nano Research2024，17，4： | 0 |
| 15 | Direct Arylation Polycondensation of Thiophene-Based C−H Monomers显示文摘Direct arylation polycondensation(DArP)has emerged as an eco-friendly and atom-efficient methodology for the syntheses ofπ-conjugated polymers(CPs).This approach features the direct C—H arylation of an aromatic hydrocarbon with an aryl halide.Given the prevalence of thiophene-containing CPs,achieving efficient and defect-free DArP of thiophene-based C−H monomers is of great significance.This review presents a mechanistic insight into DArP and describes the development of DArP catalytic systems for varied thiophene-based C−H monomers.Moreover,the control of the primary defects(i.e.,branching and homo-coupling)in thiophene-based DArP is also elaborated.By emphasizing the principles behind monomer selection and catalytic system optimization,this review intends to provide a framework for future advancements in the DArP of thiophene-containing CPs. | Xuwen Zhang Yibo Shi Yunfeng Deng Yanhou Geng | 2023 | Chinese Journal of Chemistry2023，41，21： | 0 |
| 16 | Retina-inspired organic neuromorphic vision sensor with polarity modulation for decoding light information显示文摘The neuromorphic vision sensor(NeuVS),which is based on organic field-effect transistors(OFETs),uses polar functional groups(PFGs)in polymer dielectrics as interfacial units to control charge carriers.However,the mechanism of modulating charge transport on basis of PFGs in devices is unclear.Here,the carboxyl group is introduced into polymer dielectrics in this study,and it can induce the charge transfer process at the semiconductor/dielectric interfaces for effective carrier transport,giving rise to the best device mobility up to 20 cm^(2) V^(−1) s^(−1) at a low operating voltage of−1 V.Furthermore,the polarity modulation effect could further increase the optical figures of merit in NeuVS devices by at least an order of magnitude more than the devices using carboxyl group-free polymer dielectrics.Additionally,devices containing carboxyl groups improved image sensing for light information decoding with 52 grayscale signals and memory capabilities at an incredibly low power consumption of 1.25 fJ/spike.Our findings provide insight into the production of high-performance polymer dielectrics for NeuVS devices. | Ting Jiang Yiru Wang Wanxin Huang Haifeng Ling Guofeng Tian Yunfeng Deng Yanhou Geng Deyang Ji Wenping Hu | 2023 | Light(Science & Applications)2023，12，11： | 0 |
| 17 | The Analysis and Numerical Simulation of Dynamical Functions of the Transpiration Cooling Control System with Surface Ablation显示文摘TheAnalysisandNumericalSimulationofDynamicalFunctionsoftheTranspirationCoolingControlSystemwithSurfaceAblationXuYanhou;WuGuan... | Xu Yanhou Wu Guangyu(Department of Modern Mechanics,University of Science & Technology of China, Hefei, 230026)Gong Guanghui(Graduate School of USTC, Beijing, 100039)Yang Xueshi(P.O.Box 142-206, Beijing, 100854) | 1994 | Journal of Systems Engineering and Electronics1994，5，1： | 0 |
| 18 | Fusing Thienoisoindigo to the Conjugated Ribbons with Strong Absorption in the Second Near-Infrared Window显示文摘Organic dyes with strong absorption in the second near-infrared(NIR-II)window(1000-1700 nm)have multiple applications.However,the design and synthesis of stable NIR-II absorbing organic dyes are very challenging and constantly defy our synthetic ability.In this work,we have successfully synthesized a series of soluble and stable fused thienoisoindigo(nThIID)ribbons.The absorption maximum(λ_(max))of the ribbons increases from 644 nm of 1ThIID to 1252 nm of 6ThIID.Importantly,nThIIDs with n≥4 all display strong absorption in the NIR-II window with molar extinction coefficients(ε_(max))greater than 105 L mol^(−1)cm^(−1)atλmax.These molecules are promising photothermal conversion dyes with photothermal conversion efficiencies of ca.60%under 1064 nm laser irradiation. | Yu Jiang Yaogang Zhang Yunfeng Deng Shaoqiang Dong Bo Li Yuanping Yi Zebing Zeng Hanjiao Chen Hao Luo Yanhou Geng | 2022 | CCS Chemistry2022，4，11： | 0 |
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