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SSRN 2023年

作者： Shi, Wei Rong, Bin Li, Shuzhe Lin, Yang Liao, Yingjie Cao, Chenhui Pan, Saihu Wei, Bin Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Shanghai200072 China School of Mechatronic Engineering and Automation Shanghai University Shanghai200444 China School of Microelectronics and Control Engineering Changzhou University Changzhou213164 China Anhui Sholon New Material Technology Co. Ltd. Anhui Chuzhou239500 China Shanxi Datong University China

The mechanochromic properties of two acridine heterocyclic derivatives with a donor-acceptor configuration, 10-phenyl-10-(4-(7,7,13,13-tetramethyl-7,13-dihydro-5H-indeno[1,2-b]acridin-5-yl)phenyl)anthracene-9(10H)-one (DpAn-InAc) and 10-(4-(5,5-dimethylbenzofuro[3,2-c]acridin-13(5H)-yl)phenyl)-10-phenylanthracen-9(10H)-one (DpAn-BzAc), were investigated. The average red shift of the emission peak was 18 nm for DpAn-InAc, with the long grinding time bringing the greatest shift, while both the highest and the lowest pretreat temperature brought a greater impact on the luminescent peak. The grinded DpAn-BzAc preheated at 100 °C showed the maximum wavelength shift, which was ascribed to the lower glass transition temperature of DpAn-BzAc. Meanwhile, the discolored sample could be recovered by ethanol fumigation, proving that the discoloration was reversible. XRD analyses revealed that under the anisotropic force, the microcrystalline structure of DpAn-InAc and DpAn-BzAc were destroyed, resulting in the shift of the fluorescence peak. The fluorescence shift of DpAn-BzAc was more obvious than that of DpAn-InAc, while its recovery was inferior compared to DpAn-InAc, which was due to its looser molecular structure. Finally, DpAn-InAc and DpAn-BzAc were applied in delivering rewritable encrypted information and both of the two molecules have shown capabilities in transmitting coded information. This work sheds light on using the molecule with donor-acceptor molecular structure in the stimuli-responsive field, and shows their potential application in transmitting encrypted information. © 2023, The Authors. All rights reserved.

关键词： Fluorescence

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Synthesis, Characterization, Photophysical and Electroluminescent Properties of Iridium Complexes with Cf3-Substituted 1,3,4-Oxadiazole Amide Ancillary Ligands

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SSRN 2023年

作者： Zhang, Fuli Li, Ting Zhao, Yunping Feng, Cuilan Han, Huabo Wei, Donghui Li, Zhongyi Zhai, Bin Liu, Daosheng Wei, Bin School of Petrochemical Engineering Liaoning Petrochemical University Fushun113001 China Engineering Technical Research Centre for Optoelectronic Functional Materials of Henan Province Key Laboratory of Biomolecular Recognition and Sensing of Henan Province College of Chemistry and Chemical Engineering Shangqiu Normal University Shangqiu476000 China Key Laboratory of Advanced Display and System Applications Ministry of Education School of Mechatronic Engineering and Automation Shanghai University Shanghai200072 China College of Chemistry and Molecular Engineering Zhengzhou University Zhengzhou450001 China Shanxi Datong University China

In this work, we synthesized four new heteroleptic iridium(III) complexes Ir1−Ir4 using CF3-substituted 1,3,4-oxadiazole amide with excellent electron mobility as ancillary ligands. Crystal structure, photophysical and electrochemical properties of Ir1−Ir4 were studied in detail, and theoretical calculations were performed to interpret their photophysical behaviors. At room temperature, complexes Ir1 and Ir2 emit almost coincident green phosphorescence peaked at 506 nm with Commission Internationale de l’Eclairage (CIE) color coordinates of (0.21, 0.64) and (0.24, 0.64), respectively. Complexes Ir3 and Ir4 exhibit greenish blue and greenish yellow light with double-peaks structure located at 496 and 531 nm with CIE color coordinates of (0.20, 0.40) and (0.30, 0.52), respectively. The phosphorescent organic light-emitting diodes (PHOLEDs) based on these complexes exhibit very mild efﬁciency roll-off, which is attributed to the application of the emitters using CF3-substituted 1,3,4-oxadiazole amide with excellent electron mobility as ancillary ligands. © 2023, The Authors. All rights reserved.

关键词： Iridium compounds

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Reliability of organic light-emitting diodes in low-temperature environment

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Chinese Physics B 2020年第12期29卷 112-118页

作者： Saihu Pan Zhiqiang Zhu Kangping Liu Hang Yu Yingjie Liao Bin Wei Redouane Borsali Kunping Guo School of Microelectronics and Control Engineering Changzhou UniversityChangzhou 213164China School of Mechatronic Engineering and Automation Key Laboratory of Advanced Display and System ApplicationsMinistry of EducationShanghai UniversityShanghai 200072China Universdity of Grenoble Alpes CNRSCERMAVF-38000 GrenobleFrance London Centre for Nanotechnology University College LondonLondon WC1H 0AHUK

Organic light-emitting diode(OLED)is an electroluminescent technology that relies on charge-carrier dynamics and is a potential light source for variable environmental ***,by exploiting a self-developed low-temperature testing system,we investigated the characteristics of hole/electron transport,electro-optic conversion efficiency,and operation lifetime of OLEDs at low-temperature ranging from-40℃to 0℃and room temperature(25℃).Compared to devices operating at room temperature,the carrier transport capability is significantly decreased with reducing temperature,and especially the mobility of the hole-transporting material(HTM)and electron-transporting material(ETM)at-40℃decreases from 1.16×10-6 cm2/V·s and 2.60×10-4 cm2/V·s to 6.91×10-9 cm2/V·s and 1.44×10-5 cm2/V·s,***,the temperature affects differently on the mobilities of HTM and ETM,which favors unbalanced charge-carrier transport and recombination in OLEDs,thereby leading to the maximum current efficiency decreased from 6.46 cd·A-1 at 25℃to 2.74 cd·A-1 at-40℃.In addition,blue fluorescent OLED at-20℃has an above 56%lifetime improvement(time to 80%of the initial luminance)over the reference device at room temperature,which is attributed to efficiently dissipating heat generated inside the device by the low-temperature environment.

关键词： organic light-emitting diodes(OLEDs) low temperature reliability operation lifetime

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A Low Delay AES Round Transform Architecture Using Constant Matrix Multiplications Merging Technologies

A Low Delay AES Round Transform Architecture Using Constant ...

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IEEE Conference on Industrial Electronics and applications (ICIEA)

作者： Xinxing Zheng Xiaoqiang Zhang Fan Yang Mingyu Xu Han Yan College of Information Engineering Wuhu Institute of Technology Wuhu China Key Laboratory of Advanced Perception and Intelligent Control of High-end Equipment Ministry of Education Wuhu China Engineering Research Center of Vehicle-Mounted Display Integration System Wuhu China College of Electrical Engineering Anhui Polytechnic University Wuhu China

ISBN: (纸本)9781665409858

This paper presents a low delay architecture design method for the hardware implementation of the advanced Encryption Standard (AES) algorithm. The proposed architecture is designed by using constant matrix multiplications (CMM) merging technologies. To reduce the area cost in hardware implementations, S-box/InvS-box is usually implemented with composite field arithmetic (CFA) technologies. In this paper, CMM in CFA-based S-box/InvS-box are further merged with constant coefficient multiplications in MixColumns/ InvMixColumns, which can also be expressed as CMM forms. By the merging, the delay of the hardware implementation of encryption round transform is reduced at the cost of slight area cost increasing, and both delay and area cost are reduced in hardware implementations of decryption round transform. Hardware complexities analysis indicates that our designs have less delay compared with previous works.

关键词： Industrial electronics Costs Design methodology Merging Transforms Hardware Delays

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Multi-Dimensional Linear Scanning Algorithm for Silicon-based Micro-OLED 17

Multi-Dimensional Linear Scanning Algorithm for Silicon-base...

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17th China International Forum on Solid State Lighting and 2020 International Forum on Wide Bandgap Semiconductors China, SSLChina: IFWS 2020

作者： Zhou, Houda Guo, Aiying Wang, Fei Zhang, Jianhua Shanghai University Ministry of Education Key Laboratory of Advanced Display and System Applications Shanghai200072 China School of Mechanical Engineering and Automation Shanghai University Shanghai200072 China School of Microelectronics Shanghai University Shanghai200072 China

ISBN: (数字)9780738111889

ISBN: (纸本)9780738111889

With the continuous development of display devices and technologies, as a new type of display device, silicon-based Micro-OLED has become a new type of display device in the fields of augmented reality, virtual reality, etc. due to its high brightness, self-luminous, low power consumption, and rich color display. In this paper, the research on the driving scanning algorithm of silicon-based Micro-OLED is carried out. Based on the linearity of the traditional PWM scanning algorithm, the sensitivity parameters of the human eye at different gray levels are added to the randomized gray mapping function. The optimization search is carried out by the combination of degree mapping, and finally a multiple linear scanning algorithm suitable for high refresh rate and high gray level is proposed. Through experiments, the multivariate linear scanning algorithm proposed in this paper has higher linearity than the optimal scanning algorithm, and the scanning efficiency reaches 100%. It has the advantages of reducing the driving frequency and increasing the display frame rate. © 2020 IEEE.

关键词： Augmented reality

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Simulation study on thermal mechanical properties of 4×4 Micro-LED array in flip-chip bonding process

Simulation study on thermal mechanical properties of 4×4 Mi...

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

作者： Xiaoxiao Ji Fei Wang Luqiao Yin Jianhua Zhang Key Laboratory of Advanced Display and System Applications Shanghai University Ministry of Education Shanghai China School of Mechatronic Engineering and Automation Shanghai University Shanghai China School of microelectronics Shanghai University Shanghai China

ISBN: (纸本)9781665495479

With the advent of the Micro-light-emitting diodes, it has become the focus of display and visible light communication research. However, as the LED chip size shrinks, the difficulty of integration increase gradually. Nowadays, the integration of Micro- LEDs in display is still a challenge for commercialization. In this work, we conducted a comparative study by finite element method simulation to reveal the influencing factors of bonding yield. The results show that stress concentrates at the junction of the bumps and electrodes of Micro-LED chips, and the stress concentration at the corner of Micro-LED array is more seriously. By altering the parameters of bumps, such as shapes and materials to reduce the stress and stress concentration. Numerical simulate results provide theoretical basis for reducing stress and stress concentration and optimizing the bump shape.

关键词： Shape Tin Light emitting diodes Silicon Indium Bonding Stress

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Research on panoramic illumination imaging system based on SURF algorithm

Research on panoramic illumination imaging system based on S...

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

作者： Fei Wang Xiaoxiao Ji Luqiao Yin Aiying Guo Jianhua Zhang School of microelectronics Shanghai University Shanghai China Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Shanghai China School of Mechatronic Engineering and Automation Shanghai University Shanghai China

ISBN: (纸本)9781665495479

Underwater lighting systems and imaging systems are mainly used in underwater pipeline internal inspection, underwater environment information collection, resource detection, etc. This article explores a panoramic lighting imaging system based on an underwater environment. Mainly from the intelligent lighting system, panoramic imaging system, and system integration optimization. The intelligent lighting system mainly explores a high-brightness intelligent lighting device with a high-brightness lighting system. The imaging system mainly works in conjunction with the lighting system. The imaging system mainly collects 250° panoramic picture information and 250° video information for scientific research and other tasks. Provide appropriate information and data. Finally, system integration optimization and joint work are carried out.

关键词： Temperature Splicing Lighting Imaging system integration Streaming media Real-time systems

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A New Low-power Pixel Circuit for OLEDoS Microdisplay 17

A New Low-power Pixel Circuit for OLEDoS Microdisplay

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17th China International Forum on Solid State Lighting and 2020 International Forum on Wide Bandgap Semiconductors China, SSLChina: IFWS 2020

作者： Hao, Deng Aiying, Guo Feng, Ran Shanghai University Microelectronic Research Development Center 99 Shangda Road Baoshan District Shanghai200444 China Shanghai University Key Laboratory of Advanced Display and System Applications 99 Shangda Road Baoshan District Shanghai200072 China

ISBN: (纸本)9780738111889

In order to solve the problem of high bandwidth data volume and low power consumption of OLEDoS microdisplay panels, this paper proposes a new type of digital low-power pixel circuit. The driving circuit includes a plurality of pixel driving units, which can store multi-pixel bit information at one time, thereby reducing the amount of data read operation. Compared with the traditional digital pixel circuit, the proposed circuit can skip the grayscale data writing process when the picture is still or the rate of change is low, thus reducing the data flow and power consumption. © 2020 IEEE.

关键词： Electric power utilization

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CQD-LEDs with High Colour Rendering Index 17

CQD-LEDs with High Colour Rendering Index

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17th China International Forum on Solid State Lighting and 2020 International Forum on Wide Bandgap Semiconductors China, SSLChina: IFWS 2020

作者： Yan, Yuxian Zhang, Doudou Yin, Luqiao Zhang, Jianhua Shanghai University School of Materials Science and Engineering Shanghai200072 China Shanghai University Ministry of Education Key Laboratory of Advanced Display and System Applications Shanghai200072 China School of Mechatronics and Automation Shanghai University Shanghai200072 China

ISBN: (纸本)9780738111889

Quantum dots (QD), which is considered the ideal candidate of third generation semiconductor lighting, has the advantages of high quantum yield, adjustable emission wavelength and narrow full width at half maxima (FWHM), thus it is an ideal choice as the colour converting materials for LEDs. InGaN LEDs are the main choice of solid-state lighting, which is always applied with Ce-doped yttrium aluminum garnet (YAG: Ce3+) yellow phosphor to achieve white light. However, white light achieved by this method has a low colour rendering index (CRI), mainly because of the missing of red spectral components in YAG: Ce3+, thus the CRI is lower than 80 and the correlated colour temperature (CCT) is always above 6500K. In order to increase the CRI of white LEDs, in this paper, we fabricated yellow CQDs and applied it on blue LED chips, red QD films were also used to increase the CRI of our white LEDs. The result shows that the white LEDs with yellow CQDs and red QD films has a max CRI of 94.3 at a driving current of 70mA, the Commission International de L'Eclairage (CIE) chromaticity coordinates are (0.325, 0.3435), and the CCT is 5832K, which is white light with high CRI and can be used in indoor lighting. © 2020 IEEE.

关键词： Yttrium aluminum garnet

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Design of waveguide eyeglass for full-color display with large field of view

Design of waveguide eyeglass for full-color display with lar...

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Computational Optical Sensing and Imaging, COSI 2020 - Part of Imaging and Applied Optics Congress 2020

作者： Shi, Xueliang Liu, Juan Xiao, Jiasheng Han, Jian Beijing Engineering Research Center for Mixed Reality and Advanced Display School of Optics and Photonics Beijing Institute of Technology Beijing100081 China Key laboratory of information system and technology Beijing institute of control and electronic technology Beijing100038 China

A waveguide eyeglass system integrating freeform elements and volume gratings have been proposed and designed. The simulation results show that the hybrid system can show full color images with FOV 31.56°×24... 详细信息

ISBN: (纸本)9781557528209

关键词： Hybrid systems

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