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SSRN 2025年

作者： Xu, Yachen Zhou, Qi Li, Chunya Wu, Ranghui Shi, Wei Lin, Yang Lan, Weixia Wei, Bin School of Mechatronic Engineering and Automation Shanghai University Shanghai200444 China Shanghai Engineering Research Center for Integrated Circuits and Advanced Display Materials Shanghai University Shanghai200072 China Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Shanghai200072 China

We have designed and synthesized 2-(9,9'-spirobi[fluoren]-2-yl)-1,10-phenanthroline (SBFPA) and investigated its optoelectrical and thermal characteristics to apply it as a charge generation layer (CGL). The SBFPA-engaged CGL in tandem organic light-emitting diodes (OLEDs) could efficiently generate and balance the injection of carriers. The current efficiency of the tandem red phosphorous OLED reached 31.2 cd/A at a luminance of 10,000 cd/m², which is 2.7 times that of the single OLED (11.6 cd/A). The decomposition temperature of SBFPA was as high as 342 ℃, which guaranteed the thermal stability of the tandem OLED. Moreover, the T95 lifetime (time to 95% of the initial luminance) of the tandem OLED reached 229 h. The charge generation ability of CGL was confirmed through a p-i-n-CGL-structured OLED, where CGL was inserted between the electron injection layer and the cathode to work as the source of electron generation. The maximum power efficiency of the OLED increased 30.9% to 10.46 lm/W, and the maximum luminescence enhanced 41.5% to 23925 cd/m2 compared to the OLED without CGL. The results highlight the promising application of the developed CGL in tandem OLED, offering new possibilities for development of reliable electronics. © 2025, The Authors. All rights reserved.

关键词： Organic light emitting diodes (OLED)

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High Color Gamut Top-Emitting Organic Light-Emitting Diode Based on Metal/Transparent Conductive Oxide Composite Electrode

SSRN

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SSRN 2025年

作者： Lin, Yang Zhu, Yangyang Zhao, Ben Gu, Jialu Xu, Yachen Lan, Weixia Chen, Guo Shi, Wei Kido, Junji Wei, Bin Shanxi Datong University China School of Mechatronic Engineering and Automation Shanghai University Shanghai200072 China Shanghai Engineering Research Center for Integrated Circuits and Advanced Display Materials Shanghai University Shanghai200072 China Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Shanghai200072 China Nanan Institute Shanghai University Nan'an Fujian Quanzhou362300 China Frontier Center for Organic Materials Yamagata University 4-3-16 Jonan Yonezawa992-8510 Japan

Top-emitting organic light-emitting diodes (TEOLEDs) based on metal/transparent conductive oxide composite anodes, which were Al/ITO and Ag/ITO, were studied. The microcavity effect was optimized by adjusting the microcavity thickness and microcavity order to achieve high color gamut RGB monochromatic light display. Through mathematical modeling and spectral simulation, TEOLEDs with different microcavity structures were designed. The results showed that the full width at half maximum and the color purity of the light of the TEOLED based on the second-order microcavity were significantly optimized compared to those of the TEOLED based on the first-order microcavity. Meanwhile, the TEOLEDs based on the Ag/ITO composite electrode exhibited better optoelectronic performance, with the significantly enhanced external quantum efficiency of up to 19.40%, narrower full width at half maximum of down to 20 nm, and improved color purity. The corresponding red, green, and blue TEOLEDs had achieved excellent color coordinates of (0.697, 0.301), (0.154, 0.769), and (0.139, 0.050), and the color gamut area of the device had reached 172.4% of the color gamut area of the bottom-emitting OLED, 125.6% of the National Television system Committee standard color gamut, and 93.8% of the ITU-R Recommendation BT.2020 standard color gamut. © 2025, The Authors. All rights reserved.

关键词： Organic light emitting diodes (OLED)

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EXPERIMENTAL STUDY ON THE VORTEX FORMATION AND ENTRAINMENT CHARACTERISTICS FOR A ROUND TRANSVERSE JET IN SHALLOW WATER

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Journal of Hydrodynamics 2009年第3期21卷 386-393页

作者： FAN Jing-yu ZHANG Yan WANG Dao-zeng Shanghai Institute of Applied Mathematics and Mechanics Shanghai University Shanghai 200072 China Key Laboratory of Advanced Display and System Applications Ministry of Education and SMIT Center School of Mechatronics Engineering and Automation Shanghai University Shanghai 200072 China

The vortex formation and entrainment characteristics for a round transverse jet in shallow water were experimentally investigated by means of a combination of LIF flow visualization and PIV measurement. A scarf vortex wrapped around the main body of the jet is formed in the near-wall region due to the interaction between the resulting wall jet and sufficiently shallow crossflow, with some more or less unsteady flow properties and with spreading ranges as functions of both the velocity ratio and the water depth within the near field. The entrainment of the ambient crossflow fluid into the jet main body is closely associated with the time-evolving features of the shear layer between the jet and surrounding fluid as well as the induced vortical structures near the wall. In the case of slight impingement upon the wall, the interaction between the jet shear layer and the weak, unstable scarf vortex gives rise to an appreciable local entrainment enhancement, confined in the near-wall region in the vicinity of the stagnation point. While in the case of intense impingement upon the wall, the well-organized and stable scarf vortex gives rise to a greatly enhanced entrainment and a greatly increased lateral spreading rate nearly throughout the overall near field as compared to the conventional wall jet. In addition, the entrainment of the ambient crossflow fluid by the scarf vortex in this case occurs largely on the surface of the unique spiral roller structure by itself due to the presence of smaller and unorganized eddies, and accordingly the scarf vortex is likely to keep its spiral roller structure steadily to a relatively great downstream distance within the near field.

关键词： transverse jet shallow water vortex formation entrainment PIV measurement

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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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Synthesis of oriented ZnO nanofibers using electrospun method on si (100) substrate 4

Synthesis of oriented ZnO nanofibers using electrospun metho...

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4th International Conference on Chemical Engineering and advanced Materials, CEAM 2014

作者： Lu, Xiu Zhen Xu, Ming Tao Chang, Yan Yan Peng, Bo Key Laboratory of Advanced Display and System Applications Ministry of Education and SMIT Center School of Mechatronic Engineering and Automation Shanghai University Shanghai China

ISBN: (纸本)9783038352693

ZnO nanofibers on Si (100) were synthesized by electrospun and calcination process. The morphology, structure and optical performance were investigated by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy and photoluminescence (PL) spectrum. XRD results indicated ZnO nanofibers on Si (100) wafer calcined at 600 °C had a preferred growth orientation of (002) direction. ZnO nanofibers calcinated at 600 °C had an excellent crystalline structure with the diameters ranging from 70 to 150 nm. Defect states in the ZnO nanofibers were observed, which resulted in the green emission in PL spectrum. © (2014) Trans Tech Publications, Switzerland.

关键词： X ray diffraction

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Wigner-Ville distribution and cross Wigner-Ville distribution of noisy signals

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Journal of systems Engineering and Electronics 2008年第5期19卷 1053-1057页

作者： Chen Guanghua Ma Shiwei Liu Ming Zhu Jingming Zeng Weimin Key Laboratory of Advanced Display and System Applications Ministry of Education & Microelectronic Research and Development Center Shanghai Univ. Shanghai 200072 P. R. China

The Wigner-Ville distribution （WVD） and the cross Wigner-Ville distribution （XWVD） have been shown to be efficient in the estimation of instantaneous frequency （IF）. But the statistical result of the IF estimation from XWVD peak is much better than using WVD peak. The reason is given from a statistical point of view. Theoretical studies show that XWVD of the analyzed signal can be estimated from XWVD of the noise-contaminated signal. The estimation is unbiased, and the variance is equal to that of noise. In this case, WVD cannot be estimated from W-VD of the noise-contaminated signal. Therefore, higher SNR is required when WVD is used to analyze signals.

关键词： Wigner-Ville distribution cross Wigner-Ville distribution instantaneous frequency expectation variance.

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Alignment of electrospun nanofibers on folding foil

Alignment of electrospun nanofibers on folding foil

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2014 International Conference on Materials Science and Computational Engineering, ICMSCE 2014

作者： Lu, Xiu Zhen Peng, Bo Chang, Yan Yan Xu, Ming Tao Key Laboratory of Advanced Display and System Applications Ministry of Education and SMIT Center School of Mechatronic Engineering and Automation Shanghai University Shanghai 200072 China

ISBN: (纸本)9783038350996

Aligned array electrospun nanofibers are preferred and even necessary in most of applications. Most research reported was focus on the quality and uniform of directions of the array nanofibers. This paper describes a simple method for fabrication of large area aligned naonofibers. A zigzag shape collector was used in the electrospinning system. Alignment of nanofibers was realized by this system. Nanofibers collected on the 'peak' and 'valley' of the Aluminum foil were oriented. This system is a hybrid structure of parallel electrodes and disc collector with tip-like top. © (2014) Trans Tech Publications, Switzerland.

关键词： Alignment

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Microstructures of ZnO electrospun nanofibers on AzO glass

Microstructures of ZnO electrospun nanofibers on AzO glass

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2014 International Conference on Materials Science and Engineering Technology, MSET 2014

作者： Lu, Xiu Zhen Chang, Yan Yan Xu, Ming Tao Peng, Bo Key Laboratory of Advanced Display and System Applications Ministry of Education and SMIT Center School of Mechatronic Engineering and Automation Shanghai University Shanghai 200072 China

ISBN: (纸本)9783038351023

ZnO electrospun nanofibers were considered to be potential novel materials in applications of photovoltaic devices and sensors. AZO glass was usually used in those devices as transparent electrodes. ZnO nanofibers on AZO glass were synthesized by electrospinning and calcination process. Scanning 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 nanofibers. Network structure composed of sheet ZnO was observed. Raman spectra and PL spectrum indicated the existence of defect states in the ZnO nanofibers. © (2014) Trans Tech Publications, Switzerland.

关键词： 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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Numerical Investigation on the Thermal Properties of the Micro-cooler

Numerical Investigation on the Thermal Properties of the Mic...

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2010 11th International Conference on Electronic Packaging Technology & High Density Packaging(2010 电子封装技术与高密度封装国际会议)

作者： Shun Wang Yangming Liu Yan Zhang Johan Liu Key Laboratory of Advanced Display and System Applications Ministry of Education & SMIT Center Sch Key Laboratory of Advanced Display and System Applications Ministry of Education & SMIT Center Sch

The micro-pin-fins prepared on the back side of the power chip enable heat removal on the level of modern microsystem demands. Carbon nanotube (CNT) has been proven to be a potential material for micro-cooler because of its superior advantages including high thermal conductivity, good mechanical property and so forth. And there emerges various applications of CNT in the micro-cooler system. In the present paper, micro-pin-fin heat sink with gas impinging jet as the cooling medium is analyzed. The heat dissipation of forced air convection cooling with micro-pin-fin structures made of aligned carbon nanotube arrays has been taken into consideration. The three-dimensional computational fluid dynamics (CFD) simulation was carried out. The temperature distribution and the pressure drop are studied in the cases of various geometrical parameters of the micro-pin-fin heat sinks at the same heating power prescribed. The fluid flow and the heat transfer phenomena in the micro-pin-fins heat sinks are investigated. The heat removal efficiency of the air micro-cooler is evaluated. An array of 8×8 fins with the optimized fin-to-base length ratio achieves the best cooling effect.

关键词： Heat sinks Heat transfer Space heating Temperature distribution Mathematical model Carbon nanotubes

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