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White Light Phosphors: A Nonrare‐Earth Ions Self‐Activated White Emitting Phosphor under Single Excitation (Adv. Funct. Mater. 44/2015)

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advanced Functional Materials 2015年第44期25卷

作者： Hongyu Guo Junying Zhang Lun Ma Jose L. Chavez Luqiao Yin Hong Gao Zilong Tang Wei Chen Department of Physics Beihang University Beijing 100191 China Department of Physics University of Texas at Arlington Arlington TX 76019 USA Key Laboratory of Advanced Display and System Applications (Shanghai University) Ministry of Education Shanghai 200072 China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 China

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The study of microcrystalline silicon thin films prepared by PECVD

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2012 Workshop on Inorganic Thin Films and Coatings

作者： Li, Chunya Zhang, Hao Li, Jun Li, Xifeng Zhang, Jianhua Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Shanghai 200072 China

ISBN: (纸本)9783037855669

Under different growth conditions, microcrystalline silicon thin films are deposited successfully on glass substrates by the double-frequency plasma enhanced chemical vapor deposition (PECVD). We report the systematic investigation of the effect of process parameters (hydrogen dilution, substrate temperature, forward power, reaction pressure, et al.) on the growth characteristics of microcrystalline silicon thin films. Raman scattering spectra are used to analyze the crystalline condition of the films and the experimental results. Optimizing the process parameters, the highest crystalline volume fraction of microcrystalline silicon films was achieved. It is found that the crystalline volume fraction of microcrystalline silicon films reaches 72.2% at the reaction pressure of 450 Pa, H2/SiH4 flow ratio of 800sccm/10sccm, power of 400 W and substrate temperature of 350 °C. © (2013) Trans Tech Publications, Switzerland.

关键词： Thin films

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Effects of substrate temperature on the properties of silicon nitride films by PECVD

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2012 Workshop on Inorganic Thin Films and Coatings

作者： Li, Chunya Li, Xifeng Chen, Longlong Shi, Jifeng Zhang, Jianhua Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Shanghai 200072 China

ISBN: (纸本)9783037855669

Under different growth conditions, silicon nitride (SiNx) thin films were deposited successfully on Si(100) substrates and glass substrates by plasma enhanced chemical vapor deposition (PECVD). The thickness, refractive index and growth rate of the thin films were tested by ellipsometer. The surface morphologies of the thin films were investigated using atomic force microscope (AFM). The average transmittance in the visible region was over 90%. © (2013) Trans Tech Publications, Switzerland.

关键词： Plasma enhanced chemical vapor deposition

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Characterization of electrospun zinc oxide nanofibers

Characterization of electrospun zinc oxide nanofibers

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2013 International Conference on Materials for Renewable Energy and Environment, ICMREE 2013

作者： Chang, Yanyan Zhang, Nanhong Zhuang, Mengke Lu, Xiuzhen Key Laboratory of Advanced Display and System Applications Ministry of Education and SMIT Center Shanghai University Shanghai China

ISBN: (纸本)9781479933365

ZnO nanofibers were prepared by sol-gel processing and electrospinning technique. Poly (vinyl acetate) (PVA) and zinc acetate were used as precursors of PVA/ zinc acetate composite fibers. The composite and calcined nanofibers were characterized by Thermo gravimetric analysis (TGA), energy disperse spectroscopy (EDS), X-ray diractometer (XRD) and scanning electron microscopy (SEM), respectively. After calcination of PVA/zinc acetate composite nanofibers at 400, 600, and 800°C in air for 2 hours with heating rate of ∼4°C/min, ZnO nanofibers were obtained successfully. The ZnO nanofiber diameters were 207, 135, 158, and 200nm before and after calcination at 400, 600, 800°C, respectively. The diameter of fibers reduced firstly and then increased with the rising calcination temperature. The possible mechanism of it is also discussed. © 2013 IEEE.

关键词： Electrospinning

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Microstructures of ZnO electrospun nanofibers on AZO glass

Microstructures of ZnO electrospun nanofibers on AZO glass

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The 2014 International Conference on Materials Science and Engineering Technology(MSET 2014)

作者： Xiuzhen Lu Yanyan Chang Mingtao Xu Bo Peng Key Laboratory of Advanced Display and System Applications Ministry of Education andSMIT CenterSchool of Mechatronic Engineering and AutomationShanghai University

ISBN: (纸本)9783038351023

ZnO electrospun nanofibers were considered to be potential novel materials in applications of photovoltaic devices and sensorsAZO glass was usually used in those devices as transparent electrodesZnO nanofibers on AZO glass were synthesized by electrospinning and calcination processScanning electron microscopy(SEM), transmission electron microscopy(TEM), Raman spectroscopy and photoluminescence(PL) spectrum was employed to investigate the morphology, structure and optical performance of ZnO nanofibersNetwork structure composed of sheet ZnO was observedRaman spectra and PL spectrum indicated the existence of defect states in the ZnO nanofibers.

关键词： ZnO nanofibers electrospinning AZO glass

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Carbon nanotubes for electronics manufacturing and packaging:from growth to integration

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Advances in Manufacturing 2013年第1期1卷 13-27页

作者： Johan Liu Di Jiang Yifeng Fu Teng Wang Department of Microtechnology and Nanoscience Chalmers University of Technology Key Laboratory of Advanced Display and System Applications and SMIT Center School of Automation and Mechanical Engineering Shanghai University SHT Smart High Tech AB Fysikgrnd 3412 96 GothenburgSweden

Carbon nanotubes （CNTs） possess excellent electrical, thermal and mechanical properties. They are light in weight yet stronger than most of the other materials. They can be made both highly conductive and semi-conductive. They can be made from nano-sized small catalyst particles and extend to tens of millimeters long. Since CNTs emerged as a hot topic in the early 1990s, numerous research efforts have been spent on the study of the various properties of this new material. CNTs have been proposed as alternative materials of potential excellence in a lot of applications such as electronics, chemical sensors, mechanical sensors/actuators and composite materials, etc. This paper reviews the use of CNTs particularly in electronics manufacturing and packaging field. The progresses of three most important applications, including CNT-based thermal interface materials, CNT-based interconnections and CNT-based cooling devices are reviewed. The growth and post-growth processing of CNTs for specific applications are introduced and the tai- loring of CNTs properties, i.e., electrical resistivity, thermal conductivity and strength, etc., is discussed with regard to specific application requirement. As the semiconductor industry is still driven by the need of getting smaller and faster, CNTs and the related composite systems as emerging new materials are likely to provide the solution to the future challenges as we make more and more complex electronics devices and systems.

关键词： Carbon nanotubes Electronicsmanufacturing Electronics packaging - Growth Integration

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Efficiency and color rendering index improvement of white organic light-emitting device for lighting applications

Efficiency and color rendering index improvement of white or...

引用

第十届中国国际半导体照明论坛

作者： Jianning Yu Bin Wei Jianhua Zhang Key Laboratory of Advanced Display and System Applications Ministry of EducationShanghai University

High efficiency performance[1,2] and color rendering index(CRI)[3-7] are two main requirements for white organic light-emitting diode(WOLED) which can be applied in high-quality lighting *** report successful fabrication of efficient and high CRI phosphorescent WOLED by employing ultra-thin emitting layer architecture[8] and developing multi-peak electroluminescence spectra[9].By fine-tuning the thicknesses of emitting layers and space layer,we have obtained WOLED with a high CRI of 80 and high luminance efficiency(LE) of 29.2 cd/A which only rolls off to 22.8 cd/A at 1000 cd/*** multi-peak WOLED,CRI above 85 and a maximum luminance efficiency of 27.3 cd/A are realized with three *** four-peak WOLED yields color-temperature tunable white emission in the luminance range of 100 cd/m2 to 5000 cd/m2,demonstrates a sunlight-like spectrum with a CRI of 89 at 5000 cd/*** ultra-thin emitting layer is a promising technique to achieve high performance WOLED and the wide color-temperature span of four-peak WOLED could meet the requirement for lighting indwellings.

关键词： Efficiency and color rendering index improvement of white organic light-emitting device for lighting applications

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Speech control system for Robot based on Raspberry Pi

引用

2013 3rd International Symposium on Chemical Engineering and Material Properties, ISCEMP 2013

作者： Lu, Chen Hong Hu, Yue Li Key Laboratory of Advanced Display and System Applications Shanghai University Ministry of Education Campus P.O.B.221 149 Yanchang Rd Shanghai 200072 China School of Mechatronics and Automation Shanghai University Shanghai 200072 China

ISBN: (纸本)9783037858363

Raspberry Pi is a credit card sized Linux computer based on ARM 11 architecture. Because of its small size, low power consumption and powerful performance, a robot controller is a suitable role for it to play. As a robot with artificial intelligence, speech recognition for controlling the robot and voice feedback to users is key parts of the entire system. In this essay, a robot called Lisa is assembled, and a speech control and interactive system is implemented based on Google voice API which is a voice recognition engine provided as a cloud service, hi order to analysis complex voice commands, a semantic method is developed to catch key words from command sentences. Then try to make a pattern match between key words and instruction set build-in the robot control system. The speech recognition control and interactive system is effective and well behaved after experimental verification. © (2013) Trans Tech Publications, Switzerland.

关键词： Speech recognition

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Study of edge emission and its induced photo pumping by using microcavity organic light emitting diodes

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2nd International Conference on Opto-Electronics Engineering and Materials Research, OEMR 2013

作者： Xu, Hong Guang Ran, Feng Ji, Yuan Wei, Bin Zhu, Wen Qing Micro-electronic R and D Center School of Mechatronics Engineering and Automation Shanghai University 149 Yanchang Road Shanghai China Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University 149 Yanchang Road Shanghai China

ISBN: (纸本)9783037857731

The authors have investigated the edge emission of microcavities which are formed by low-molecular organic light emitting diodes sandwiched between dielectric mirrors and the metal cathode. The edge emission relative to the surface emission is found to significantly depend on the layer number of alternating high and low refractive index films in dielectric mirrors. The enhancement of cavity devices can reach a factor of ~3.0 compared with noncavity devices. Spectra of organic film pumped by edge emission of microcavity devices have been observed, a mechanism of achievement of an amplified spontaneous emission has been discussed theoretically. © (2013) Trans Tech Publications, Switzerland.

关键词： Microcavities

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Characterization of Electrospun Zinc Oxide Nanofibers

Characterization of Electrospun Zinc Oxide Nanofibers

引用

2013 International Conference on Materials for Renewable Energy and Environment

作者： Yanyan Chang Nanhong Zhang Mengke Zhuang Xiuzhen Lu Key Laboratory of Advanced Display and System Applications Ministry of Education and SMIT CenterSchool of Mechatronics Engineering and AutomationShanghai University

ISBN: (纸本)9781479933372

ZnO nanofibers were prepared by sol-gel processing and electrospinning ***(vinyl acetate)(PVA) and zinc acetate were used as precursors of PVA/zinc acetate composite *** composite and calcined nanofibers were characterized by Thermo gravimetric analysis(TGA),energy disperse spectroscopy(EDS),X-ray diractometer(XRD) and scanning electron microscopy(SEM),*** calcination of PVA/zinc acetate composite nanofibers at 400,600,and 800°C in air for 2 hours with heating rate of ～4°C/min,ZnO nanofibers were obtained *** ZnO nanofiber diameters were 207,135,158,and 200nm before and after calcination at 400,600,800°C,*** diameter of fibers reduced firstly and then increased with the rising calcination *** possible mechanism of it is also discussed.

关键词： ZnOnanofibers electrospinning Morphologies calcination

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