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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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Improvement of barrier performance in thin film encapsulation for organic light-emitting diodes by a prior planarization process

Improvement of barrier performance in thin film encapsulatio...

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第十九届国际电子封装技术会议(ICEPT 2018)

作者： Cunping Qin Xingwei Ding Jianhua Zhang Jun Yang Tao Xu School of Mechatronic Engineering and Automation Shanghai University Shanghai China School of Material Science and Engineering Shanghai University Shanghai China Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai Univers

The organic/inorganic hybrid barriers were fabricated to encapsulate the organic light-emitting ***2O3 as inorganic layer was deposited by atomic layer deposition(ALD)and polydimethoxysilane(PDMS)as organic layer was prepared by the spin-coating *** was found that the optimized encapsulation structure with a prior planarization process had a better barrier performance with a lower water vapor transmission rate improved effectively from 4.95 × 10-1 gm-2 day-1 of Al2O3/PDMS films to 7.30 × 10-3 gm-2 day-1 of the hybrid PDMS/Al2O3/PDMS films at 60℃ and a relative humidity of 90%and a longer luminance decay *** improvements were attributed to the surface planarization of encapsulation basement including the coverage of particles by the prior spin-coating process,reducing the defects of inorganic film in process,and the hydrophobic surface of the outermost polymer lowering the adsorption of water vapor.

关键词： Organic/inorganic hybrid barriers Organic light-emitting diodes Planarization process Water vapor transmission rate

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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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44.3:Invited Paper:Solution-processed inorganic charge transport layers for efficient and stable quantum-dot LEDs

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SID Symposium Digest of Technical Papers 2019年第S1期50卷

作者： Xuyong Yang Fan Cao Haoran Wang Piaoyang Shen Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai University 149 Yanchang Road Shanghai P. R. China 20007

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Correction: Highly efficient, all-solution-processed, flexible white quantum dot light-emitting diodes

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Journal of Materials Chemistry C 2020年第45期8卷 16241-16241页

作者： Piaoyang Shen Xiaomin Li Fan Cao Xingwei Ding Xuyong Yang Key Laboratory of Advanced Display and System Applications of Education of Ministry Shanghai University 149 Yanchang Road Shanghai 200072 P. R. China

Correction for ‘Highly efficient, all-solution-processed, flexible white quantum dot light-emitting diodes’ by Piaoyang Shen et al., J. Mater. Chem. C, 2018, 6, 9642–9648, DOI: 10.1039/C8TC03155J.

Correction for ‘Highly efficient, all-solution-processed, flexible white quantum dot light-emitting diodes’ by Piaoyang Shen et al., J. Mater. Chem. C, 2018, 6, 9642–9648, DOI: 10.1039/C8TC03155J.

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Rational Design of Oxygen-Enriched Carbon Dots with Efficient Room-Temperature Phosphorescent Properties and High-Tech Security Protection application

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ACS Sustainable Chemistry & Engineering 2019年第24期7卷 19918-19924页

作者： Yu Han Ming Li Jiawei Lai Weitao Li Yijian Liu Luqiao Yin Lianqiao Yang Xiaogang Xue Robert Vajtai Pulickel M. Ajayan Liang Wang Institute of Nanochemistry and Nanobiology School of Environmental and Chemical Engineering Shanghai University No.99 Shangda Road Baoshan District Shanghai 200444 P. R. China Department of Materials Science and NanoEngineering Rice University 6100 Main Street Houston Texas 77005 United States Key Laboratory of Advanced Display and System Applications Shanghai University Ministry of Education No.149 YanChang Road Jingan District Shanghai 200072 P. R. China School of Materials Science and Engineering Guangxi Key Laboratory of Information Materials Guilin University of Electronic Technology 1 Jinji Road Guilin 541004 P. R. China

Room-temperature phosphorescent (RTP) carbon dots (CDs) have been fascinated by a lot of scholars because of their stable triplet excited states and environmental friendliness. Herein, novel fluorescent oxygen-enriched CDs were synthesized by a simple one-step solvothermal approach, which can be applied in cell imaging directly as a nontoxic fluorescent probe. When mixing the CDs with polyvinyl alcohol, the composite exhibits excellent RTP performance, which has the exciting prospect of applications in security protection. The observed RTP is attributed to the lone pair electrons provided by oxygen-rich functional groups of CDs. Benefitting from the n → π* transition and triplet exciton filling, the C–O–C groups of CDs play a significant role in their ultralong RTP performance. Our finding creates an avenue for advanced security protection technology based on metal-free RTP carbon nanomaterials.

关键词： Composites Phosphorescence Fluorescence Cadmium sulfide Materials

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A Robust Illumination Normalization Method Based on Mean Estimation for Face Recognition

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International Scholarly Research Notices 2013年第1期2013卷

作者： Yong Luo Ye-Peng Guan Chang-Qi Zhang School of Communication and Information Engineering Shanghai University 99 Shangda Road Shanghai *** Key Laboratory of Advanced Displays and System Application Ministry of Education 99 Shangda Road Shanghai ***

An illumination normalization method for face recognition has been developed since it was difficult to control lighting conditions efficiently in the practical applications. Considering that the irradiation light is of little variation in a certain area, a mean estimation method is used to simulate the illumination component of a face image. Illumination component is removed by subtracting the mean estimation from the original image. In order to highlight face texture features and suppress the impact of adjacent domains, a ratio of the quotient image and its modulus mean value is obtained. The exponent result of the ratio is closely approximate to a relative reflection component. Since the gray value of facial organs is less than that of the facial skin, postprocessing is applied to the images in order to highlight facial texture for face recognition. Experiments show that the performance by using the proposed method is superior to that of state of the arts.

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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000卷

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 CenterShanghai Univ.Shanghai 200072P.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 *** reason is given from a statistical point of *** studies show that XWVD of the analyzed signal can be estimated from XWVD of the noise-contaminated *** estimation is unbiased,and the variance is equal to that of *** this case,WVD cannot be estimated from WVD of the noise-contaminated ***,higher SNR is required when WVD is used to analyze signals.

关键词： Wigner-Ville distribution cross Wigner-Ville distribution instantaneous frequency expectation vari-ance

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P-5.2: Aqueous Sr-doped In2O3TFT stability under negative bias illumination stress

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SID Symposium Digest of Technical Papers 2019年第S1期50卷

作者： Youhang Zhou Jun Li Yaohua Yang Xifeng Li Jianhua Zhang School of Material Science and Engineering Shanghai University Jiading Shanghai China Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Shanghai China

In this paper, the Sr-doped In 2 O 3 thin film is fabricated by aqueous route and the stability of InSrO thin film transistor under negative bias illumination stress (NBIS) is investigated. It is found that Sr can effectively improve the stability of In 2 O 3 TFTs under NBIS, which is due to the reduction of oxygen vacancies. The XPS measurement is tested to analyze the variation of oxygen vacancy concentration. The density of states is calculated to further confirm the decrease of total trap state caused by Sr doping.

关键词： Sr-doped In2O3 thin film transistor aqueous route negative bias illumination stress stability

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Encapsulation of OLED device by Using Anisotropic Conductive Adhesive

Encapsulation of OLED device by Using Anisotropic Conductive...

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International Symposium on High Density Packaging and Microsystem Integration (HDP)

作者： Yan Zhang Mans Andreasson Hua Zhou Johan Liu Thorvald Andersson Jing-yu Fan Department of Applied Mechanics Chalmers University of Technology Gothenburg Sweden Key Laboratory of Advanced Display and System Applications (Shanghai University) Ministry of Education & SMIT Center Shanghai University China Applied seminconductor Physics Department of Microtechnology and Nanoscience Chalmers University of Technology Gothenburg Sweden SMIT Center & Department of Microtechnology and Nanoscience Chalmers University of Technology Gothenburg Sweden Shanghai Institute of Applied Mathematics and Mechanics Shanghai University Shanghai China

Organic light emitting diodes (OLEDs) is one of the most potential display technologies in the flat panel display (FPD) field, and its applications include simple monochrome large-area lighting to full color, video-capable graphics displays and so on. As organic materials are susceptible to humidity and oxygen, encapsulation is a key issue for OLED device reliability. In the present paper, two kinds of OLED samples have been studied; one encapsulated by adhesive matrix with fillers, and one without encapsulation. Variation of the electrical parameters of the OLED samples with respect to exposure time has been measured. The primary experiment investigation was carried out for the OLED sample sealed with an anisotropic conductive adhesive. Encapsulation material analysis, such as choices of different fillers/absorbent in the adhesive matrix, optimization of polymer matrix etc., will be conducted in future work.

关键词： Encapsulation Organic light emitting diodes Anisotropic magnetoresistance Conductive adhesives Flat panel displays LED lamps Graphics Organic materials Humidity Materials reliability

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