检索结果-南通市图书馆

Chinese Journal of Chemistry 2015年第8期33卷 909-916页

作者： Zhongjie Xu Guozheng Shi Jianyu Yuan Emily Glenn Hai-Qiao Wang Wanli Ma Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices Soochow University Suzhou Jiangsu 215123 China University of Waterloo 200 University Avenue West Waterloo Ontario N2L3G1 Canada

Two new D-A type polymers PBDSe-DPP and PBDSe-ID were synthesized to explore new ideal semiconduct- ing polymers, by conjugating acceptor unit diketopyrrolopyrrole/isoindigo to a donor unit benzo[l,2-b：4,5-b＇]di- selenophene, which is designed by substituting the sulfur atom with a selenium atom in the benzo[1,2-b：4,5-b＇]- dithiophene. The thermal, optical, electrochemical, photoelectric and photovoltaie properties of the two polymers were studied systematically. Relatively high open circuit voltage （0.7 and 0.75 V） and fill factor （〉65%） were demonstrated for both polymers. Huge increase （by 64% and 120%） of the short circuit current density was achieved for both polymer based devices by using additive compared to the corresponding reference without addi- tive, resulting in decent power conversion efficiency of 3.7% and 2.5% respectively with only simple optimizing consideration. We believe this class of BDSe polymer possesses a good potential to be alternatives of active material for photovoltaic applications.

关键词： semiconducting polymer benzo[1,2-b:4,5-b']diselenophene synthesis characterization photovoltaics

Modulating Bandgap and HOCO/LUCO Energy of semiconducting polymer by Copolymerization or Incorporation of Electron Withdrawing/Releasing Groups

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 2007年第5期23卷 598-601页

作者： YAN Liu-ming LU Wen-cong Department of Chemistry College of Sciences Shanghai University Shanghai 200A.A.A. P. R. China

The modulation of bandgap and HOCO/LUCO energies of conjugated polymers by copolymerization or by incorporation of electron withdrawing/releasing groups is *** study was conducted by band structure calculation applying density functional theory with generalized gradient *** polymers and copolymers were modeled as 1D infinite system with periodical boundary condition along the molecular *** is concluded that the bandgap and HOCO/LUCO energies of conjugated polymers depend on both electron withdrawing/releasing effects and non-bonding interaction between a side group and the conjugated systems.

关键词： Ab initio calculation Density functional theory Band structure semiconducting polymer Low bandgap

High-photosensitivity polymer thin-film transistors based on poly(3-hexylthiophene)

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2012年第8期21卷 574-579页

作者：刘玉荣黎沛涛姚若河 The School of Electronic and Information Engineering South China University of Technology Guangdong Provincial Key Laboratory of Short-range Wireless Detection and Communication South China University of Technology Department of Electrical and Electronic Engineering the University of Hong KongPokfulam Rd.

polymer thin-film transistors （PTFTs） based on poly（3-hexylthiophene） are fabricated by the spin-coating process, and their photo-sensing characteristics are investigated under steady-state visible-light illumination. The photosensitivity of the device is strongly modulated by gate voltage under various illuminations. When the device is in the subthreshold operating mode, a significant increase in its drain current is observed with a maximum photosensitivity of 1.7×10^3 at an illumination intensity of 1200 lx, and even with a relatively high photosensitivity of 611 at a low illumination intensity of 100 lx. However, when the device is in the on-state operating mode, the photosensitivity is very low： only 1.88 at an illumination intensity of 1200 lx for a gate voltage of -20 V and a drain voltage of -20 V. The results indicate that the devices could be used as photo-detectors or sensors in the range of visible light. The modulation mechanism of the photosensitivity in the PTFT is discussed in detail.

关键词： semiconducting polymer thin film transistor photosensitivity phototransistor

Controlling Ion Conductance and Channels to Achieve Synapticlike Frequency Selectivity

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2015年第2期7卷 121-126页

作者： Siheng Lu Fei Zeng Wenshuai Dong Ao Liu Xiaojun Li Jingting Luo Laboratory of Advanced Materials (MOE) School of Materials Science and Engineering Tsinghua University Institute of Thin Film Physics and Applications Shenzhen Key Laboratory of Sensor Technology Shenzhen University

Enhancing ion conductance and controlling transport pathway in organic electrolyte could be used to modulate ionic kinetics to handle signals. In a Pt/Poly(3-hexylthiophene-2,5-diyl)/Polyethylene?Li CF3SO3/Pt hetero-junction, the electrolyte layer handled at high temperature showed nano-fiber microstructures accompanied with greatly improved salt solubility. Ions with high mobility were confined in the nano-fibrous channels leading to the semiconducting polymer layer,which is favorable for modulating dynamic doping at the semiconducting polymer/electrolyte interface by pulse *** a device realized synaptic-like frequency selectivity, i.e., depression at low frequency stimulation but potentiation at high-frequency stimulation.

关键词： Ions migration Nano-channels Frequency selectivity semiconducting polymer Organic electrolyte Dynamic doping

Electronic mobility in the high-carrier-density limit of ion gel gated IDTBT thin film transistors

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2015年第9期24卷 20-24页

作者：包蓓邵宪一谭璐王文河吴越珅文理斌赵家庆唐伟张为民郭小军王顺刘荧 Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education) Department of Physics and AstronomyShanghai Jiao Tong University Collaborative Innovation Center of Advanced Microstructures Department of Electronic Engineering Shanghai Jiao Tong University College of Chemistry and Chemical Engineering Guangxi University for Nationalities Department of Physics and Materials Research Institute Pennsylvania State University

Indacenodithiophene-co-benzothiadiazole（IDTBT） has emerged as one of the most exciting semiconducting polymers in recent years because of its high electronic mobility and charge transport along the polymer backbone. By using the recently developed ion gel gating technique we studied the charge transport of IDTBT at carrier densities up to 10^21cm^-*** the conductivity in IDTBT was found to be enhanced by nearly six orders of magnitude by ionic gating, the charge transport in IDTBT was found to remain 3D Mott variable range hopping even down to the lowest temperature of our measurements, 12 K. The maximum mobility was found to be around 0.2 cm^2·V^-1·s^-1, lower than that of Cytop gated field effect transistors reported previously. We attribute the lower mobility to the additional disorder induced by the ionic gating.

关键词： semiconducting polymer ion gel gating charge transport variable range hopping

Liquid nitrogen post-treatment for improved aggregation and electrical properties in organic semiconductors

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第12期35卷 306-312页

作者： Yuqing Ding Zhiying Yi Zhihui Wang Hongyu Chen Yan Zhao Laboratory of Molecular Materials and Devices Department of Materials Science Fudan University Department of Pathology Changhai Hospital Naval Medical University Second Medical Center & National Clinical Research Center for Geriatric Diseases Chinese People's Liberation Army General Hospital

Organic semiconductors are promising candidates as active layers in flexible and biocompatible electronics owing to their solution processability and molecular design flexibility. However, it remains necessary to establish a green processing approach to acquire desirable electrical properties for scalable industrial applications. Here, a highly efficient and environmentally friendly post-treatment method using liquid nitrogen as a cooling bath is developed to optimize the aggregation structure and electrical performance of organic semiconductors. The carrier mobility has increased by nearly 60% with this treatment, achieving a performance boost comparable to that of traditional annealing methods. This performance improvement is attributable to the denser aggregation structure and enhanced molecular ordering compared with those of as-cast semiconducting polymer films. Impressively, the entire process can be completed within a few minutes without additional vacuum or high-temperature conditions, offering an economical and efficient alternative to traditional methods. Furthermore, the enhancement effect and long-term stability of this treatment are validated across a wide range of organic semiconductors, positioning this green and versatile approach as a promising substitute for conventional post-treatment, thereby facilitating the development of next-generation sustainable electronics.

关键词： Organic electronics Environmentally friendly process Ultralow-temperature post-treatment Charge carrier mobility semiconducting polymer Organic small molecule

在线全文

学校读者我要写书评

暂无评论

高分子半导体复合薄膜垂直相分离分析新技术

高分子半导体复合薄膜垂直相分离分析新技术