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International Symposium on Electronic Materials and Packaging

作者： Xuechun Lin Qinghua Li Jianhua Zhang Key Laboratory of Advanced Display and System Applications (Ministry of Education) School of Mechatronic and Automation Engineering Shanghai University Shanghai China Department of Fine Chemicals and Materials Engineering Shenzhen Polytechnic Shenzhen China

Curing agents greatly influence the electrical conductivity of epoxy resin/Ag composed isotropic conductive adhesives (ICA). In this paper, three kinds of latent curing agents-dicyandiamide (DICY), boron-amine complex (594) and imidazole derivate (MZ) were used for formulating one-package epoxy-based ICA, respectively. The investigation showed that the 70% silver-containing conductive adhesive with imidazole derivate as curing agent has excellent conductivity and its bulk resistivity was 5times10 -4 Omegaldrcm. boron- amine complex also show good conductivity in the same formula. However, the ICA with DICY as curing agent gave poor conductivity performance. The different curing mechanisms were linked to the different conductivity of ICAs cured by different agents. In the ICA with DICY as curing agent, the agent has two strong polar N and -CN group, it has strong molecular adhesion to silver. Basically one DICY molecule can link 4 epoxy groups. During the curing process, the active functional groups (- CN-, -N and -OH) link with silver and possibly form a layer of dense polymer capsulate covering on the surface of silver. This polymer capsulate is the key reason to increase the tunnelling resistance. So the ICA with DICY as curing agent gave poor conductivity. When use imidazole derivant or boron-amine complex as curing agent, which follows the anion or cation-catalytic-polymerization curing mechanism, the curing products were polyether gloss network. In such situation, the interaction between resin and silver is weak, therefore decreases the tunnelling resistance , thus can achieve good conductivity.

关键词： Curing Conductivity Conductive adhesives Independent component analysis Silver Contact resistance Electric resistance Polymers Epoxy resins Surface resistance

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OTFT with bilayer gate insulator and modificative electrode

Pan Tao Ti Hsueh Pao/Chinese Journal of Semiconductors

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Pan Tao Ti Hsueh Pao/Chinese Journal of Semiconductors 2008年第4期29卷 650-654页

作者： Bai, Yu Khizar-Ul-Haq Khan, M.A. Jiang, Xueyin Zhang, Zhilin Department of Materials Science Shanghai University Shanghai 201800 China Key Laboratory of Advanced Display and System Application Shanghai University Shanghai 200072 China

An organic thin-film transistor (OTFT) with an OTS/SiO2 bilayer gate insulator and a MoO3/Al electrode configuration between gate insulator and source/drain electrodes has been investigated. A thermally grown SiO2 layer is used as the OTFT gate dielectric and copper phthalocyanine (CuPc) is used as an active layer. This 0TS/SiO2 bilayer gate insulator configuration increases the field-effect mobility, reduces the threshold voltage, and improves the on/off ratio simultaneously. The device with a MoO3/Al electrode has shown similar Ids compared to the device with an Au electrode at the same gate voltage. Our results indicate that using a double-layer of electrodes and a double-layer of insulators is an effective way to improve OTFT performance.

关键词： Thin film transistors

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Facile way to fabricate high quality white LED with yellow graphene quantum dots

Facile way to fabricate high quality white LED with yellow g...

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第十九届国际电子封装技术会议(ICEPT 2018)

作者： Jipeng Zhou Jianhua Zhang Chunya Li Luqiao Yin Liang Wang School of Material Science and Engineering Shanghai University Shanghai China Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai Univers Institute of Nanochemistry and Nanobiology Shanghai University Shanghai China

Because of the fabulous fluorescence characteristics,semiconductor quantum dots have attracted a lot attention since the first ***,the applications of quantum dots have been limited by its own *** appearance of graphene quantum dots(GQDs)breaks the awkward *** can also realize from ultraviolet to near infrared full visible light broad band *** lower cost,better biocompatibility and stability than semiconductor quantum dots make it possible to replace inorganic quantum dots for chemical sensing,biomarkers,and optoelectronic *** this paper,the synthesis of doped GQDs is mainly *** nitrogen-chlorine doped GQDs were synthesized by hydrothermal *** as prepared GQDs were characterized by TEM,XPS,FTIR,PL and other characterization *** this study,by utilizing common industrialized technology to fabricate GQDs white LED could achieve large-scale *** rendering index of as prepared white GQDs LED was *** is much higher than YAG phosphor white *** the chromaticity coordinates of GQDs LED located at(0.34,0.36).The correlated color temperature of 5075K was very consistent with indoor lighting *** means this GQDs white LED has great application prospects in the field of high-end lighting.

关键词： Graphene quantum dots Lighting emitting diodes High quality lighting

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Light-emitting field-effect transistors with EQE over 20%enabled by a dielectric-quantum dots-dielectric sandwich structure

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Science Bulletin 2022年第5期67卷 529-536,M0004页

作者： Lingmei Kong Jialong Wu Yunguo Li Fan Cao Feijiu Wang Qianqian Wu Piaoyang Shen Chengxi Zhang Yun Luo Lin Wang Lyudmila Turyanska Xingwei Ding Jianhua Zhang Yongbiao Zhao Xuyong Yang Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai UniversityShanghai 200072China CAS Key Laboratory of Crust-Mantle Materials and Environments School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei 230026China Henan Key Laboratory of Photovoltaic Materials Henan UniversityKaifeng 475004China Faculty of Engineering University of NottinghamNottingham NG72RDUK Center for Optoelectronic Engineering Research Department of PhysicsSchool of Physics and AstronomyYunnan UniversityKunming 650091China

Emerging quantum dots(QDs)based light-emitting field-effect transistors(QLEFETs)could generate light emission with high color purity and provide facile route to tune optoelectronic properties at a low fabrication *** efforts have been devoted to designing device structure and to understanding the underlying physics,yet the overall performance of QLEFETs remains low due to the charge/exciton loss at the interface and the large band offset of a QD layer with respect to the adjacent carrier transport ***,we report highly efficient QLEFETs with an external quantum efficiency(EQE)of over 20%by employing a dielectric-QDs-dielectric(DQD)sandwich *** DQD structure is used to control the carrier behavior by modulating energy band alignment,thus shifting the exciton recombination zone into the emissive ***,enhanced radiative recombination is achieved by preventing the exciton loss due to presence of surface traps and the luminescence quenching induced by interfacial charge *** DQD sandwiched design presents a new concept to improve the electroluminescence performance of QLEFETs,which can be transferred to other material systems and hence can facilitate exploitation of QDs in a new type of optoelectronic devices.

关键词： Light-emitting field-effect transistors Quantum dots Electroluminescence External quantum efficiency

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A study of fluid coolant with carbon nanotube suspension for microchannel coolers

A study of fluid coolant with carbon nanotube suspension for...

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International Conference on (ICEPT) Electronic Packaging Technology

作者： Yi Fan Yifeng Fu Yan Zhang Teng Wang Xiaojing Wang Zhaonian Cheng Johan Liu Key Laboratory of Advanced Display & System Applications SMIT Center and School of Automation and Mechanical Engineeringl Shanghai University China SMIT Center and Bionano Systems Laboratory Department of Microtechnology and Nanosciences Chalmers University of Technology Gothenburg Sweden

In this work, silicon microchannel coolers were made using the deep ion reactive etching (DIRE) technique. Stable and homogeneous carbon nanotube (CNT) suspension was also prepared. Meanwhile, a closed-loop cooling test system was developed to investigate the heat removal of the silicon microchannel cooler with different coolants. The experimental setup included a test module, a minipump for providing controllable flow, and a fan system for cooling the circular fluid. Beside the inlet and outlet of the test module, two thermocouples and pressure gauges were set up to measure the temperature and pressure of the fluids. The heat removal of the silicon microchannel cooler using different CNT volume fraction of suspension coolant was studied. The results show that the microchannel cooler with CNT suspension as coolant could strengthen the heat removal capability of microchannel cooler. In addition to heat transfer enhancement, the microchannel cooler with CNT suspension coolant did not produce extra pressure drop in the present study.

关键词： Coolants Suspensions Microchannel Heating Temperature measurement Silicon Heat transfer

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Analysis and Research Based on Electrohydrodynamic Inkjet Printing

Analysis and Research Based on Electrohydrodynamic Inkjet Pr...

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China International Forum o Solid State Lighting: International Forum on Wide Bandgap Semiconductors China (SSLChina: IFWS)

作者： Zhaoyu Chen Xinyi Wang Luqiao Yin Jianhua Zhang School of Microelectronics Shanghai University Shanghai China Key Laboratory of Advanced Display and System Applications Shanghai University Ministry of Education Shanghai China School of Microelectronics Shanghai Key Laboratory of Chips and Systems for Intelligent Connected Vehicle Shanghai University China

ISBN: (数字)9798331541149

ISBN: (纸本)9798331541156

Electrohydrodynamic (EHD) inkjet printing has the advantages of high precision and high automation, and its forming mechanism is complex. In this paper, the stress of Taylor cone and its influencing factors were analyzed systematically, and explored the influence of different process parameters on the printing process and effect. The results showed that the larger the voltage, the larger the droplet; the longer the cycle and voltage duration, the larger the droplet; the droplet size was linear with voltage and period. The influence of the printing height on the droplet size was very obvious. Excessive voltage made the printing process very unstable and inaccurate, and the droplet size gap was large and the droplet printing position deviated. Hope to provide some ideas for related research.

关键词： Automation Photonic band gap Voltage Ink jet printing Electrostatics Electrohydrodynamics Stress

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Interactive object segmentation using iterative adjustable graph cut

Interactive object segmentation using iterative adjustable g...

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2011 IEEE Visual Communications and Image Processing, VCIP 2011

作者： Shi, Ran Liu, Zhi Xue, Yinzhu Zhang, Xiang School of Communication and Information Engineering Shanghai University Shanghai 200072 China Key Laboratory of Advanced Display and System Application Shanghai University Ministry of Education Shanghai 200072 China Institute of Image Processing and Pattern Recognition Shanghai Jiaotong University Shanghai 200240 China

ISBN: (纸本)9781457713200

Interactive object segmentation is widely used for extracting any user-interested objects from natural images. A common problem with many interactive segmentation approaches is that the object segmentation quality is degraded due to inaccurate object/background seeds provided by the user. This paper proposes an iterative adjustable graph cut to efficiently solve this problem. First, object/background seeds are initialized based on the object segmentation result obtained with the user-specified scribbles as the interactive input. Then, an iterative seed adjustment scheme is exploited to correct inaccurate seeds and extract new suitable seeds via graph cut, in which the balancing weight between energy terms are adaptively updated to protect stable seeds and speedup the iteration process. Finally, suitable seeds are obtained and graph cut is used to segment the objects. Experimental results demonstrate the better segmentation performance of our approach even if user provides rather rough seeds. © 2011 IEEE.

关键词： Image segmentation

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Oxide Semiconductor Thin-Film Transistors with High Mobility and Stability

Oxide Semiconductor Thin-Film Transistors with High Mobility...

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International Conference on display Technology, 2024

作者： Yan, Guowen Wang, Dejian Sun, Xiaoqi Wen, Pan Peng, Cong Xu, Lin Ding, Lidong Chen, Fa-Hsyang Li, Xifeng Xi, Wangfeng Xing, Rubo Li, Junfeng Hefei Visionox Technology Co. Ltd Anhui Hefei230000 China Kunshan Govisionox Optoelectronics Co. Ltd Jiangsu Suzhou215301 China Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai University Shanghai200072 China

This paper presents a oxide thin film transistors with high mobility by a new fabricate method. The high mobility TFT with ultra-high mobility of 55cm2/Vs has been obtained, and the PBTS and NBTS has also been optimiz... 详细信息

关键词： Thin film transistors

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Salient object segmentation based on graph cut

Salient object segmentation based on graph cut

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IEEE International Symposium on Intelligent Signal Processing and Communication systems (ISPACS)

作者： Ran Shi Zhi Liu Yinzhu Xue School of Communication and Information Engineering Shanghai University China Key Laboratory of Advanced Display and System Application Ministry of Education China

Salient object segmentation is an important technique for many content based applications. This paper presents an unsupervised salient object segmentation method under the graph cut optimization framework. First, we exploit a kernel density estimation based saliency model to generate the saliency map, which provides the useful cues for object segmentation. Then we exploit the saliency map to adaptively define the region cost term, the boundary cost term and their balancing weight in the cost function, which is minimized using graph cut to obtain a binary segmentation of salient objects. Experimental results on a variety of images demonstrate the better segmentation performance of our approach.

关键词： Image segmentation

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Fast seam carving based on direction map

Fast seam carving based on direction map

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IET International Communication Conference on Wireless Mobile and Computing (CCWMC 2011)

作者： Huan Du Zhi Liu Yinzhu Xue Ran Shi School of Communication and Information Engineering Shanghai University China Key Laboratory of Advanced Display and System Application Ministry of Education China

ISBN: (纸本)9781618399571

Seam carving is a new image retargeting method, which can alleviate the distortion on the main content of the image compared to the traditional scaling method. However, the original seam carving method uses the gradient amplitudes of pixels to construct the energy map, but neglects the gradient directions of pixels. Actually, the gradient direction refers to the direction where the pixel has the maximum rate of change. We can use the gradient direction of pixels to construct the direction map, and then naturally generate multiple seams from top to bottom based on the direction map. In addition, we use the priority windows to avoid intersecting seams. Experimental results show that our method can accelerate the speed of seam carving about 98 times while maintaining the quality of the image retargeting result.

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