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Highly conductive and tough double-network hydrogels for smart electronics

SmartMat 2024年第2期5卷 54-66页

作者： Dong Zhang Yijing Tang Xiong Gong Yung Chang Jie Zheng Department of Chemical Biomolecularand Corrosion EngineeringThe University of AkronAkronOhioUSA School of Polymer Science and Polymer Engineering The University of AkronAkronOhioUSA R&D Center for Membrane Technology and Department of Chemical Engineering Chung Yuan Christian UniversityTaiwanChina

Development and understanding of highly mechanically robust and electronically conducting hydrogels are extremely important for ever-increasing energy-based *** mixing/blending of conductive additives with hydrophilic polymer network prevents both high mechanical strength and electronic conductivity to be presented in polymer ***,we proposed a double-network(DN)engineering strategy to fabricate PVA/PPy DN hydrogels,consisting of a conductive PPy-PA network via in-situ ultrafast gelation and a tough PVA network via a subsequent freezing/thawing *** resultant PVA/PPy hydrogels exhibited superior mechanical and electrochemical properties,including electrical conductivity of~6.8 S/m,mechanical strength of~0.39 MPa,and elastic moduli of~0.1 *** further transformation of PVA/PPy hydrogels into supercapacitors,they demonstrated a high capacitance of~280.7 F/g and a cycle life of 2000 galvanostatic charge/discharge cycles with over 94.3%capacity retention at the current density of 2 mA/cm2 and even subzero temperatures of−20℃.Such enhanced mechanical performance and electronic conductivity of hydrogels are mainly stemmed from a synergistic combination of continuous electrically conductive PPy-PA network and the two interpenetrating DN *** in-situ gelation strategy is applicable to the integration of ionic-/electrical-conductive materials into DN hydrogels for smart-soft electronics,beyond the most commonly used PEDOT:PSS-based hydrogels.

关键词： conducting polymers double-network hydrogels smart electronics supercapacitors

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Visible-Light Excitated Photocatalytic Activity of Rare Earth Metal-Ion-Doped Titania

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Journal of Rare Earths 2002年第6期20卷 619-625页

作者：谢一兵李萍袁春伟 National Laboratory of Molecular & biomolecular electronics Southeast University

The rare earth ion Ce 4+ doped TiO 2 was prepared by sol-gel method. The average particle sizes are about 10 nm for sol phase and 55 nm for polycrystalline phase. The photocatalytic activities to degrade Reactive Brilliant Red Dye X-3B were investigated. The result reveals that the spectrum response of Ce 4+-TiO 2 has extended to visible region from the UV region(λ<387 nm) of pure TiO 2. Amorphous phase Ce 4+-TiO 2 sol with an electron scavenger (1.0% atom fraction Ce 4+ ion doping amount) shows the capability of the photocatalytic degradation of the dye X-3B as well as the nanocrystallite Ce 4+-TiO 2 with an interband trap site. Despite of the difference in the morphology of Ce 4+-TiO 2 photocatalyst, there is no apparent difference in respect of the decoloring effects. Whereas, polycrystalline phase Ce 4+-TiO 2 exhibits strong photomineralization power in comparison with the amorphous phase. The photocatalytic oxidation mechanisms of the dye molecule mainly involved in the self-photo-sensitization photolysis process by the first excited singlet oxygen ( 1O 2) and photocatalysis process by hydroxyl radicals(·OH) under visible light irradiation.

关键词： rare earths amorphous phase polycrystalline phase photocatalysis process self-photo-sensitization photolysis interband trap site electron scavenger

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Calculation method of quantum efficiency to TiO_2 nanocrystal photocatalysis reaction

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Journal of Environmental Sciences 2002年第1期14卷 70-75页

作者： XIE Yi bing, YUAN Chun wei (National Laboratory of Molecular & biomolecular electronics, Southeast University, Nanjing 210096, China.) National Laboratory of Molecular & biomolecular electronics Southeast University Nanjing 210096 Chin

The quantum yield is an important factor to evaluate the efficiency of photoreactor. This article gives an overall calculation method of the quantum efficiency( Φ ) and the apparent quantum efficiency( Φ a) to the TiO 2/UV photocatalysis system. Furthermore, for the immobility system (IS), the formulation of the faction of light absorbed by the TiO 2 thin film is proposed so as to calculate the quantum efficiency by using the measured value and theoretic calculated value of transmissivity (T). For the suspension system(SS), due to the difficulty to obtain the absorption coefficient ( α ) of TiO 2 particulates, the quantum efficiency is calculated by means of the relative photonic efficiency ( ζ r) and the standard quantum yield ( Φ standard ).

关键词： photodegradation reaction quantum efficiency apparent quantum efficiency photonic efficiency relative photonic efficiency absorption coefficient

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Enhanced Performance and Stability in Polymer Photovoltaic Cells Using Ultraviolet-Treated PEDOT:PSS

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Chinese Physics Letters 2013年第7期30卷 167-171页

作者： XU Xue-Jian YANG Li-Ying TIAN Hui QIN Wen-Jing YIN Shou-Gen ZHANG Fengling Key Laboratory of Display Materials and Photoelectric Devices(Ministry of Education)and School of Materials Science and Engineering Tianjin University of TechnologyTianjin 300384 Tianjin Key Lab for Photoelectric Materials and Devices Tianjin 300384 biomolecular and organic electronics Center of Organic ElectronicsDepartment of PhysicsChemistry and Biology(IFM)Linkoping UniversitySE-58183 LinkopingSweden

We investigate the effects of ultraviolet(UV)irradiation treatment with varying irradiation intensities for different treatment times of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS)film on the performance and stability of polymer solar cells(PSCs)based on regioregular poly(3-hexylthiophene)(P3HT)and methanofullerene[6,6]-phenyl C61-butyric acid methyl ester(PCBM)***-visible transmission spectra,x-ray photoelectron spectroscopy,contact angle measurement,atomic force microscopy and the Kelvin probe method are conducted to characterize the UV-treated PEDOT:PSS *** results demonstrate that UV treatment can improve the power conversion efficiency(PCE)and stability of PSCs *** best performance is achieved under 1200μW/cm^(2) UV treatment for 50 *** to the control device,the optimized device exhibits enhanced performance with a V_(oc) of 0.59 V,J_(sc) of 12.3 mA/cm^(2),fill factor of 51%,and PCE of 3.64%,increased by 3.5%,33%,8.7%and 50%,*** stability of the PSCs is enhanced by 2.5 times simply through the UV treatment on the PEDOT:PSS buffer *** improvement in the device performance and stability is attributed to the improvement in the wettability property and the increase in the work function of the PEDOT:PSS film by UV treatment,while the impact of UV treatment on the transparency of the PEDOT:PSS film is *** strategy of using UV treatment to improve device performance and stability is attractive due to its simplicity,cost-effectiveness,and because it is suitable for large-scale commercial production.

关键词： stability film negligible

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Nanocontacts give efficient hole injection in organic electronics

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Science Bulletin 2021年第9期66卷 875-879,M0003页

作者： Qingzhen Bian Chiara Musumeci Chuanfei Wang reas Skallberg Yongzhen Chen Zhangjun Hu EPeter Münger Kajsa Uvdal Mats Fahlman Olle Inganas biomolecular and organic electronics Department of PhysicsChemistry and BiologyLinkoping UniversitySE-58183 LinkopingSweden Laboratory of organic electronics Department of Science and TechnologyLinkoping University60174 NorrkopingSweden Molecular Surface Physics and Nano Science Department of PhysicsChemistry and BiologyLinkoping UniversitySE-58183 LinkopingSweden Department of Physics Chemistry and BiologyLinkoping UniversitySE-58183 LinkopingSweden

A key requirement for well performing devices based onorganic semiconductors is to ensure ohmic contacts, where anefficient hole and electron injection and extraction can beachieved at the electrode/semiconductor interfaces. The usualway to obtain ohmic contacts involves fine tuning of the energet-ics at the interfaces by using dopants (p- type and n-type) to con-trol the Fermi level of the semiconductor [1,2], or using suitablemetals or metal oxides as electrodes [3].

关键词：有机发光二极管场效应晶体管空穴注入有机电子器件欧姆接触导电聚合物新型材料传输材料

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Erratum to:Efficient and stable perovskite solar cells by build-inπ-columns and ionic interfaces in covalent organic frameworks

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Nano Research 2024年第5期17卷 4639-4640页

作者： Riming Nie Xiaokai Chen Zhongping Li Weicun Chu Si Ma Changqing Li Xiaoming Liu Yonghua Chen Zhuhua Zhang Wanlin Guo State Key Laboratory of Mechanics and Control of Mechanical Structures Key Laboratoryfor Itligent Nano Materials and Devices of the Ministry of EducationInstitute for Frontier ScienceNanjing University of Aeronautics and AstronauticsNarnjing 210016China Department of Chemical and biomolecular Engineering Yonsei Universit50 Yonsei roSeodaemun-guSeoul 120749Republic of Korea College of Chemistry jilin UniversityChangchun 130012China Department of Energy and Chemical Engineering Ulsan National Instute of Science and Technology(UNIST)50 UNIST-gilEonyang-eupUju-gunUlsan 44919Republic of Korea Key Laboratory of Flexible electronics(KLoFE) School of Flexible Electronics(Future Technologies)&Institute of Advanced Materials(IAM)Nanjing Tech University(Nanjing Tech)Nanjing 211816China

Erratum to Nano Research,2023,16(7):9387-9397 htps:/***/0.100/1274-023-5603-040(1)One sentence in the article was unfortunately mispresented on page *** of As shown in Fig.S19 in the ESM,the A2/A2 values of the refere... 详细信息

关键词： COF columns perovskite

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Efficiency Enhancement of MEH-PPV:PCBM Solar Cells by Addition of Ditertutyl Peroxide as an Additive

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Chinese Physics Letters 2013年第1期30卷 161-164页

作者： LI Yan-Fang YANG Li-Ying QIN Wen-Jing YIN Shou-Gen ZHANG Feng-Ling Key Laboratory of Display Materials&Photoelectric Devices(Ministry of Education)and School of Materials Science&Engineering Tianjin University of TechnologyTianjin 300384 Tianjin Key Lab for Photoelectric Materials&Devices Tianjin 300384 biomolecular and organic electronics Center of Organic ElectronicsDepartment of PhysicsChemistry and Biology(IFM)Linköping UniversitySE-58183 LinköpingSweden

Improved power conversion efficiency(PCE)and stability of organic bulk heterojunction(BHJ)solar cells based on poly(2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene)(MEH-PPV)and methanofullerene[6,6]-phenyl C_(61)-butyric acid methyl ester(PCBM)blends are obtained by using ditert butyl peroxide(DTBP)as an *** effect of the DTBP contents on the performance of photovoltaic cells is *** results reveal that efficiency enhancement of MEH-PPV:PCBM solar cells can be realized by carefully tuning the contents of *** to the control device,the optimized device with 0.5wt%DTBP additive exhibits enhanced performance with Jsc of(3.51±0.21)mA/cm^(2),FF of(44.45±0.71)%,and PCE of(1.31±0.08)%,increased by 9.3%,8.0%and 22.4%,*** stability of the device is found to be improved by adding 0.5wt%of DTBP.

关键词： PCBM additive Solar

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Development of polymer–fullerene solar cells

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National Science Review 2016年第2期3卷 222-239页

作者： Fengling Zhang Olle Ingans Yinhua Zhou Koen Vandewal biomolecular and organic electronics Department of PhysicsChemistry and Biology(IFM)Linkoping University Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Institut fr Angewandte Photophysik Technische Universitt Dresden

Global efforts and synergetic interdisciplinary collaborations on solution-processed bulk-heterojunction polymer solar cells(PSCs or OPVs) made power conversion efficiencies over 10%*** rapid progress of the field is credited to the synthesis of a large number of novel polymers with specially tunable optoelectronic properties,a better control over the nano-morphology of photoactive blend layers,the introduction of various effective interfacial layers,new device architectures and a deeper understanding of device *** will review the pioneering materials for polymer-fullerene solar cells and trace the progress of concepts driving their *** discuss the evolution of morphology control,interfacial layers and device structures fully exploring the potential of photoactive *** order to guide a further increase in power conversion efficiency of OPV,the current understanding of the process of free charge carrier generation and the origin of the photovoltage is summarized followed by a perspective on how to overcome the limitations for industrializing PSCs.

关键词： polymer-fullerene solar cells electron donors and acceptors morphology interfacial layer device physics

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Effects of the position of silver nanoprisms on the performance of organic solar cells

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Optoelectronics Letters 2014年第4期10卷 253-257页

作者：张强秦文静曹焕奇杨利营张凤玲印寿根 Key Laboratory of Display Material and Photoelectric Devices Ministry of Education of China Tianjin University of Technology Key Laboratory of Display Material and Photoelectric Devices of the City of Tianjin Tianjin University of Technology biomolecular and organic electronics Center of Organic Electronics Department of Physics Chemistry and Biology (IFM) Linkping University

Silver nanoprisms(AgNPs) affect the performance of organic solar cells(OSCs) in different ways depending on their positions in the device. To investigate this issue, we incorporate AgNPs in different positions of OSCs and compare their performance. The power conversion efficiency(PCE) is improved by 23.60% to 3.98% when the AgNPs are incorporated in front of the active layer. On the other hand, when AgNPs are incorporated in the back of the active layer, the short-circuit current density(JSC) is improved by 17.44% to 10.84 mA/cm2. However, if AgNPs are incorporated in the active layer, both open-circuit voltage(VOC) and JSC are decreased. We discuss the position effect on the device performance, clarify the absorption shadow and exciton recombination caused by AgNPs, and finally indicate that the optimal position of plasmonic AgNPs is in front of the active layer.

关键词：有机太阳能电池最佳位置电池性能 AGNPS 短路电流密度功率转换效率银有源层

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Electroless silver plating for metallization of near-field optical fiber probes

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Chinese Optics Letters 2007年第10期5卷 594-595页

作者：李昌安徐丽娜顾宁 Hefei Center for Disease Control & Prevention National Laboratory of Molecular and biomolecular electronics Southeast University

By using mercaptopropyltrimethoxysilane （MPTS） self-assembled monolayers （SAMs）, electroless silver plating is developed for the metallization of near-field optical fiber probes. This method has the advantages of controllability, no pinholes, convenience, low cost, and smooth tip surface. The metallized probes are characterized by optical microscopy, scanning electron microscopy （SEM）, and energy dispersive X-ray spectroscopy （EDXS）.

关键词： Electroless plating Fiber optic sensors Metallizing Optical microscopy Scanning electron microscopy Self assembled monolayers X ray spectroscopy

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