Wenping Hu

Publications (150)994.32 Total impact

• Source

  Available from: nanoarchive.org

  Article: Tuning reaction processes for the synthesis of micron and nanometer sized, single crystalline lamellae of copper 7,7,8,8-tetracyano-p-quinodimethane (Phase II) with large area

  Yaling Liu, Zhuoyu Ji, Hongxiang Li, Wenping Hu, Yunqi Liu, Daoben Zhu
  [show abstract] [hide abstract]
  ABSTRACT: Two simple methods have been demonstrated to obtain large area, single crystalline lamellae of copper-7,7,8,8-tetracyanoquinodimethane (CuTCNQ). The formation of the lamellae was a result of fine tuning of the processes during the synthesis processes of CuTCNQ phase II. This facile synthesis of large area single crystalline lamellae suggests bright prospects for the study and understanding of the electrical switching of CuTCNQ by using single crystals of its phase II, and future applications of the material in memory and switching devices.
  Nano Research 04/2012; 2(8):630-637. · 6.97 Impact Factor
• Article: Water-controlled synthesis of low-dimensional molecular crystals and the fabrication of a new water and moisture indicator

  Zhuoyu Ji, Huanli Dong, Ming Liu, Wenping Hu
  [show abstract] [hide abstract]
  ABSTRACT: Arrays of low-dimensional molecular crystals of square columns (1-D) and nanolamellae (2-D) of Zn[TCNQ]2(H2O)2 with large areas (up to 10 20 cm2) have been synthesized by controlled addition of water to Zn and TCNQ. Based on the ability to accurately control the reaction, a new moisture and water indicator has been developed. The simple method, the large areas of material prepared, the fine size tuning, and the typical semiconductor behavior of the resulting low-dimensional molecular materials promise applications in molecular electronics as well as nanoelectronics. The system is an effective indicator for the detection of traces of water and moisture.
  Nano Research 04/2012; 2(11):857-864. · 6.97 Impact Factor
• Article: High Mobility, Air Stable, Organic Single Crystal Transistors of an n-Type Diperylene Bisimide

  • Aifeng Lv, Sreenivasa R. Puniredd, Jiahui Zhang, Zhibo Li, Hongfei Zhu, Wei Jiang, Huanli Dong, Yudong He, Lang Jiang, Yan Li, Wojciech Pisula, Qing Meng, Wenping Hu, Zhaohui Wang
  [show abstract] [hide abstract]
  ABSTRACT: A new n-type organic semiconductor, i.e., C12-4CldiPBI, is synthesized by a simple and facile route. Single crystal ribbons of C12-4CldiPBI are grown facilely by a solvent vapor diffusion strategy. Organic field-effect transistors based on individual ribbons are fabricated by a new technique named “Au stripe mask” method. All devices exhibit excellent n-type transistor behavior with negligible hysteresis, and all devices give an electron mobility over 1.0 cm2 V−1 s−1 with the highest mobility of 4.65 cm2 V−1 s−1. Moreover, the devices exhibit excellent air stability.
  Advanced Materials 04/2012; 24(19):2626-2630. · 13.88 Impact Factor
• Article: Sulfur-bridged annulene-TCNQ co-crystal: a self-assembled ''molecular level heterojunction'' with air stable ambipolar charge transport behavior.

  Jing Zhang, Hua Geng, Tarunpreet Singh Virk, Yan Zhao, Jiahui Tan, Chong-an Di, Wei Xu, Kamaljit Singh, Wenping Hu, Zhigang Shuai, Yunqi Liu, Daoben Zhu
  [show abstract] [hide abstract]
  ABSTRACT: An alternatively stacked donor-acceptor complex from solution is obtained. As a self-assembled "molecular level heterojunction", this crystal displays stable ambipolar transport behaviors in ambient atmosphere. The balance hole and electron transport properties are rationalized through theoretical considerations from band structure calculation, theoretical analysis on super-exchange effects in the intermolecular electronic couplings as well as molecular reorganization energy.
  Advanced Materials 04/2012; 24(19):2603-7. · 13.88 Impact Factor
• Article: Kondo effect in quantum dots and molecular devices

  Lang Jiang, Hongxiang Li, Wenping Hu, Daoben Zhu
  [show abstract] [hide abstract]
  ABSTRACT: Kondo effect is a very important many-body phenomenon in condensed matter physics, which explains why the resistance increases as the temperature is lowered (usually <10 K) in dilute magnetic alloy, and why the conductance increases as temperature is decreased in quantum dots. This paper simply introduces equilibrium and non-equilibrium Kondo effects in quantum dots together with the Kondo effect in quantum dots with even number of electrons (when the singlet and triplet states are degenerate). Furthermore, Kondo effect in single atom/molecular transistors is introduced, which indicates a new way to study Kondo effect. KeywordsKondo effect-Kondo temperature-quantum dots-molecular devices
  Chinese Science Bulletin 04/2012; 50(19):2132-2139. · 1.32 Impact Factor
• Article: Hybrid rylene arrays via combination of Stille coupling and C-H transformation as high-performance electron transport materials.

  Wan Yue, Aifeng Lv, Jing Gao, Wei Jiang, Linxiao Hao, Cheng Li, Yan Li, Lauren E Polander, Stephen Barlow, Wenping Hu, Simone Di Motta, Fabrizia Negri, Seth R Marder, Zhaohui Wang
  [show abstract] [hide abstract]
  ABSTRACT: Hybrid rylene arrays have been prepared via a combination of Stille coupling and C-H transformation. The ability to extend the π system along the equatorial axis of rylenes not only leads to broadened light absorption but also increases the electron affinity, which can facilitate electron injection and transport with ambient stability.
  Journal of the American Chemical Society 03/2012; 134(13):5770-3. · 9.91 Impact Factor
• Article: High-performance and stable organic transistors and circuits with patterned polypyrrole electrodes.

  Liqiang Li, Lin Jiang, Wenchong Wang, Chuan Du, Harald Fuchs, Wenping Hu, Lifeng Chi
  [show abstract] [hide abstract]
  ABSTRACT: High performance p-/n-type transistors and complementary inverter circuits are demonstrated using patterned polypyrrole (PPY) as pure electrodes. Strikingly, these devices show good stability under continuous operation and long-term storage conditions. Furthermore, PPY electrodes also exhibit good applicability in solution-processed and flexible devices. All these results indicate the great potential of PPY electrodes in solution-processed, all-organic, flexible, transparent, and low-power electronics.
  Advanced Materials 03/2012; 24(16):2159-64. · 13.88 Impact Factor
• Article: Solution-processed ultrathin chemically derived graphene films as soft top contacts for solid-state molecular electronic junctions.

  Tao Li, Jonas Rahlf Hauptmann, Zhongming Wei, Søren Petersen, Nicolas Bovet, Tom Vosch, Jesper Nygård, Wenping Hu, Yunqi Liu, Thomas Bjørnholm, Kasper Nørgaard, Bo W Laursen
  [show abstract] [hide abstract]
  ABSTRACT: A novel method using solution-processed ultrathin chemically derived graphene films as soft top contacts for the non-destructive fabrication of molecular junctions is demonstrated. We believe this protocol will greatly enrich the solid-state test beds for molecular electronics due to its low-cost, easy-processing and flexible nature.
  Advanced Materials 03/2012; 24(10):1333-9. · 13.88 Impact Factor
• Article: Molecular junctions based on SAMs of cruciform oligo(phenylene ethynylene)s.

  Zhongming Wei, Tao Li, Karsten Jennum, Marco Santella, Nicolas Bovet, Wenping Hu, Mogens Brøndsted Nielsen, Thomas Bjørnholm, Gemma C Solomon, Bo W Laursen, Kasper Nørgaard
  [show abstract] [hide abstract]
  ABSTRACT: Cruciform oligo(phenylene ethynylene)s (OPEs) with an extended tetrathiafulvalene (TTF) donor moiety (OPE5-TTF and OPE3-TTF) and their simple analogues (OPE5-S and OPE3) without conjugated substituents were used to form high-quality self-assembled monolayers (SAMs) on ultraflat gold substrates. Molecular junctions based on these SAMs were investigated using conducting-probe atomic force microscopy (CP-AFM). The TTF substituent changes the molecular orbital energy levels and decreases the HOMO-LUMO energy gap, resulting in a 9-fold increase in conductance for both TTF cruciform OPEs compared to the unsubstituted analogues. The difference in electrical transport properties of the SAMs was reproduced by the theoretical transport calculations for the single molecules.
  Langmuir 02/2012; 28(8):4016-23. · 4.19 Impact Factor
• Article: Mass-production of single-crystalline device arrays of an organic charge-transfer complex for its memory nature.

  Yaling Liu, Meng He, Qing Meng, Zhiyong Tang, Liqiang Li, Wenping Hu
  [show abstract] [hide abstract]
  ABSTRACT: Controllable synthesis of single-crystalline lamellae of copper tetracyano-p- quinodimethane (CuTCNQ, phase II) is achieved, and mass-produced devices or device arrays based on symmetrical Cr/Au gap electrodes are fabricated in situ. The devices exhibit semiconductor properties important for the understanding of CuTCNQ.
  Small 02/2012; 8(4):557-60, 478. · 8.35 Impact Factor
• Article: Spherical α-Ni(OH)2 nanoarchitecture grown on graphene as advanced electrochemical pseudocapacitor materials.

  Shubin Yang, Xilin Wu, Changlun Chen, Huanli Dong, Wenping Hu, Xiangke Wang
  [show abstract] [hide abstract]
  ABSTRACT: This work reports a new graphene-based composite for supercapacitor material, and the maximum specific capacitance of 1760.72 F g(-1) at a scan rate of 5 mV s(-1), with excellent cycling stability.
  Chemical Communications 02/2012; 48(22):2773-5. · 6.17 Impact Factor
• Article: Molecular crystal lithography: a facile and low-cost approach to fabricate nanogap electrodes.

  Lang Jiang, Huanli Dong, Qing Meng, Jiahui Tan, Wei Jiang, Cuiying Xu, Zhaohui Wang, Wenping Hu
  [show abstract] [hide abstract]
  ABSTRACT: A novel cost-efficient and facile technique, molecular crystal lithography, to fabricate nanogap electrodes efficiently is reported. The gap width of the electrodes can be tuned from ∼9 nm to several micrometers. Organic field-effect transistors based on the nanogap electrodes all exhibit a high performance, indicating the effectiveness and practicability of molecular crystal lithography for mass production of nanogap electrodes.
  Advanced Materials 02/2012; 24(5):694-8. · 13.88 Impact Factor
• Article: Organic photoresponse materials and devices.

  Huanli Dong, Hongfei Zhu, Qing Meng, Xiong Gong, Wenping Hu
  [show abstract] [hide abstract]
  ABSTRACT: Organic photoresponse materials and devices are critically important to organic optoelectronics and energy crises. The activities of photoresponse in organic materials can be summarized in three effects, photoconductive, photovoltaic and optical memory effects. Correspondingly, devices based on the three effects can be divided into (i) photoconductive devices such as photodetectors, photoreceptors, photoswitches and phototransistors, (ii) photovoltaic devices such as organic solar cells, and (iii) optical data storage devices. It is expected that this systematic analysis of photoresponse materials and devices could be a guide for the better understanding of structure-property relationships of organic materials and provide key clues for the fabrication of high performance organic optoelectronic devices, the integration of them in circuits and the application of them in renewable green energy strategies (critical review, 452 references).
  Chemical Society Reviews 12/2011; 41(5):1754-808. · 28.76 Impact Factor
• Article: Semiconducting π-conjugated systems in field-effect transistors: a material odyssey of organic electronics.

  Chengliang Wang, Huanli Dong, Wenping Hu, Yunqi Liu, Daoben Zhu
  Chemical Reviews 11/2011; 112(4):2208-67. · 40.20 Impact Factor
• Article: Organic Field-Effect Transistors: High-Performance Organic Single-Crystal Field-Effect Transistors of Indolo[3,2-b]carbazole and Their Potential Applications in Gas Controlled Organic Memory Devices (Adv. Mater. 43/2011).

  Hui Jiang, Huaping Zhao, Keke K Zhang, Xiaodong Chen, Christian Kloc, Wenping Hu
  Advanced Materials 11/2011; 23(43):5074. · 13.88 Impact Factor
• Article: A Copolymer of Benzodithiophene with TIPS Side Chains for Enhanced Photovoltaic Performance

  Qinqin Shi, Haijun Fan, Yao Liu, Wenping Hu, Yongfang Li, Xiaowei Zhan
  [show abstract] [hide abstract]
  ABSTRACT: A new conjugated copolymer PBDTTT-TIPS containing thiazolothiazole acceptor unit and triisopropylsilylethynyl (TIPS)-functionalized benzodithiophene donor unit was synthesized by Pd-catalyzed Stille coupling and compared with its alkoxy-substituted analogue PBDTTT-C12. PBDTTT-TIPS exhibits decomposition temperature of 377 °C, absorption maximum of 598 nm, HOMO level of −5.3 eV, and hole mobility as high as 1.2 × 10–3 cm2 V–1 s–1. Without any post-treatments, polymer solar cells based on the blend of PBDTTT-TIPS and PC71BM exhibited power conversion efficiency as high as 4.33%, which is 2 times that for device based on the PBDTTT-C12:PC71BM blend. TIPS and C12 side chains exhibit a little impact on absorption, HOMO level, and hole mobility of the polymers, but they significantly influence blend film morphology and photovoltaic performance. TIPS side chains induces excellent compatibility between PBDTTT-TIPS and PC71BM, and the PBDTTT-TIPS:PC71BM blend exhibits perfect phase separation scales around 10–20 nm, which is beneficial to charge separation and enhanced efficiency of the device, while C12 side chains leads to large phase separation, which is responsible for the lower efficiency.
  11/2011;
• Article: Mica, a potential two-dimensional-crystal gate insulator for organic field-effect transistors.

  Yudong He, Huanli Dong, Qing Meng, Lang Jiang, Wei Shao, Liangfu He, Wenping Hu
  [show abstract] [hide abstract]
  ABSTRACT: 2D mica crystals (with thickness < 100 nm) obtained by mechanical exfoliation are incorporated for the first time into the design of organic thin film field-effect transistor arrays and organic single crystal transistors as a gate insulator. The size of mica crystals could be up to the dimensions of an A4 piece of paper. All devices so fabricated exhibited high mobility and low operating voltage, indicating the high quality of the crystals and the great potential of mica crystals as a flexible, low-cost, transparent insulator for organic electronics.
  Advanced Materials 11/2011; 23(46):5502-7. · 13.88 Impact Factor
• Article: High-performance organic single-crystal field-effect transistors of indolo[3,2-b]carbazole and their potential applications in gas controlled organic memory devices.

  Hui Jiang, Huaping Zhao, Keke K Zhang, Xiaodong Chen, Christian Kloc, Wenping Hu
  Advanced Materials 09/2011; 23(43):5075-80, 5074. · 13.88 Impact Factor
• Article: Thiazolothiazole‐containing polythiophenes with low HOMO level and high hole mobility for polymer solar cells

  Qinqin Shi, Haijun Fan, Yao Liu, Jianming Chen, Zhigang Shuai, Wenping Hu, Yongfang Li, Xiaowei Zhan
  Journal of Polymer Science Part A Polymer Chemistry 09/2011; 49(22):4875 - 4885. · 3.92 Impact Factor
• Article: Sulfonated graphene for persistent aromatic pollutant management.

  Guixia Zhao, Lang Jiang, Yudong He, Jiaxing Li, Huanli Dong, Xiangke Wang, Wenping Hu
  Advanced Materials 07/2011; 23(34):3959-63. · 13.88 Impact Factor