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A novel solution-based self-assembly approach to preparing ultralong titanyl phthalocyanine sub-micron wires

Chinese Physics B 2014年第7期23卷 655-660页

作者：朱宗鹏魏斌张建华王军 School of Materials Science and Engineering Shanghai University Key Laboratory of Advanced Display and System Applications Ministry of EducationShanghai University

Ultralong titanyl phthalocyanine （TiOPc） sub-micron wires have been synthesized by a novel solution-based self- assembly method. By using different solvents, changing the mass concentration and the solvent vapor pressure, the length and the shape of the wires can be adjusted. The mixed-phase properties of the TiOPc sub-micron wires were investigated by the ultraviolet-visible （UV-vis） absorption spectrum and X-ray diffraction. Organic transistors based on these wires were studied, which show the typical p-channel characteristics.

关键词： titanyl phthalocyanine sub-micron wire transistor solution method

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Influence of reaction parameters on the luminescence properties of monodisperse NaGd（1-x-y）（WO4）2:xEu3+,yTb3+ phosphor by molten salt synthesis

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Journal of Rare Earths 2018年第1期36卷 49-57页

作者： Weiqin Xiao Luqiao Yin Jipeng Zhou Fang Lei Ying Shi Jianjun Xie Lei Zhang School of Materials Science and Engineering Shanghai University Key Laboratory of Advanced Display and System Applications Ministry of Education (Shanghai University)

Eu3+activated and Eu3+, Tb3+co-activated monodisperse sodium double tungstates NaGd（WO4）2 phosphors were prepared by molten salt method at 750 ℃ for 10 h using NaCl as a flux. The crystal structure and morphology of the as-synthesized phosphors were measured by XRD and SEM, respectively. The photoluminescence properties were characterized by PL spectra, decay lifetime and CIE. The presence of NaCl plays an important role in the morphology and luminescence properties. In this work,NaCl and one of the raw material Na2CO3in a certain proportion will form a low eutectic salt to decrease the reaction temperature and benefit the formation of monodisperse NaGd（WO4）2crystals. The color of Eu3+and Tb3+co-doped NaGd（WO4）2phosphors can be tuned from creamy white to orange, red and green by adjusting the doping concentration of rare earth ions, since the emission contain the broad blue-green emission origin from NaGd（WO4）2host and characteristic red and green emission origin from Eu3+and Tb3+ions. The electroluminescent spectra and CIE measurement shows that the LED device with NaGd（1-x）（WO4）2:xEu3+（x = 0.24） phosphor can be excited by 365 nm and 380 nm LED chip, and their CIE coordinate is（x = 0.45, y = 0.45） and（x = 0.36, y = 0.37）, Ra is 80.3 and 86.3, Tcis 3196 and4556 K, respectively. As a single-component phosphor, NaGd（WO4）2:Eu3+,Tb3+have potential application in UV-pumped WLEDs.

关键词： NaGd（1-x-y）（WO4）2:xEu3+ yTb3+ Molten salt method Single component WLEDs White light

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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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Magnetically driven biohybrid blood hydrogel fibres for personalized intracranial tumour therapy under fluoroscopic tracking

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Nature Biomedical Engineering 2025年 2025 May 1页

作者： Wang, Ben Shen, Jie Huang, Chenyang Ye, Zhicheng He, Jiajun Wu, Xinyu Guo, Zhiguang Zhang, Li Xu, Tiantian College of Chemistry and Environmental Engineering Shenzhen University Shenzhen China Shenzhen Key Laboratory of Spine Surgery Department of Spine Surgery Peking University Shenzhen Hospital Shenzhen China Guangdong Provincial Key Laboratory of Robotics and Intelligent System Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen China Hubei Collaborative Innovation Centre for Advanced Organic Chemical Materials Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials Hubei University Wuhan China Department of Mechanical and Automation Engineering The Chinese University of Hong Kong Hong Kong The Key Laboratory of Biomedical Imaging Science and System Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen China

Small materials with pliability and untethered mobility are particularly suitable for minimally invasive medical interventions inside the body. However, the capabilities and applicability of such soft ‘robots’ are restricted by foreign-body responses to them and by the need to get them cleared from the body after the intervention. Here we report the development of biodegradable magnetized biohybrid blood hydrogel fibres that evade immune recognition, and their applicability for targeted intracranial tumour therapy with real-time tracking through X-ray fluoroscopy. The gel fibres can be made of the patient’s own blood mixed with a small amount of magnetic particles and can be produced in about 15 min. We show that the locomotion of intracranially injected gel fibres through cerebrospinal fluid can be remotely controlled under a magnetic field and fluoroscopically tracked, and that a drug encapsulated in the gels can be released on demand under magnetic control, as we show for the delivery of doxorubicin to intracranial tumours in the minipigs. Biodegradable soft actuatable materials that avoid foreign-body responses may aid the development of personalized targeted interventions. © The Author(s), under exclusive licence to Springer Nature Limited 2025.

关键词： Body fluids

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Pure blue and white light electroluminescence in a multilayer organic light-emitting diode using a new blue emitter

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Chinese Physics B 2014年第7期23卷 727-731页

作者：魏娜郭坤平周朋超于建宁魏斌张建华 School of Materials Science and Engineering Shanghai University Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai University

We characterized the 6,12-bis{[N-（3,4-dimethylphenyl）-N-（2,4,5-trimethylphenyl）]amino} chrysene （BmPAC）, which has been proven to be a blue fluorescent emission with high EL efficiency. The blue fluorescent device exhibits good performance with an external quantum efficiency of 5.8% and current efficiency of 8.9 cd/A, respectively. Using BmPAC, we also demonstrate a hybrid phosphorescence/fluorescence white organic light-emitting device （WOLED） with high efficiency of 36.3 cd/A. In order to improve the relative intensity of blue light, we plus a blue light-emitting layer （BEML） in front of the orange light emitting layer （YEML） to take advantage of the excess singlet excitons. With the new emitting layer of BEML/YEML/BEML, we demonstrate the fluorescence/phosphorescence/fluorescence WOLED exhibits good performance with a current efficiency of 47 cd/A and an enhanced relative intensity of blue light.

关键词： BmPAC high efficiency blue organic light emitting diodes white organic light-emitting diodes

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Unsupervised motion detection with background update and shadow suppression

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控制理论与应用（英文版） 2012年第4期10卷 517-522页

作者： Yepeng GUAN School of Communication and Information Engineering Shanghai University Key Laboratory of Advanced Displays and System Application Ministry of Education

An algorithm is developed to detect moving object and suppress shadow. According to motion variations caused by some moving objects in a scene, a background update approach is proposed. The developed update method ef- ficiently prevents undesired corruption of background and does not consider the adaptation coefficient or the learning rate used in some existing algorithms. A multi-scale wavelet transform methodology is used to segment foreground from a clut- ter background. The optimal selection of threshold value is automatically determined which does not require any complex supervised training or manual calibration. According to photometric invariant, a color ratio difference is proposed to sup- press shadow. Some complete foreground motion object regions are extracted by integrating moving object segmentation in the multi-scale wavelet with shadow suppression in the color ratio difference. The mentioned method is less affected by the presence of moving objects in a scene. Experimental results show that the proposed approach is efficient in detecting motion objects and suppressing shadows by comparisons.

关键词： Moving objects segmentation Shadow elimination Color ratio Multi-scale wavelet transformation

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Fine-tuning the thicknesses of organic layers to realize high-efficiency and long-lifetime blue organic light-emitting diodes

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Chinese Physics B 2012年第8期21卷 186-190页

作者：于建宁张民艳李崇尚玉柱吕燕芳魏斌黄维 Key Laboratory of Advanced Display and System Applications Ministry of EducationShanghai University Key Laboratory for Organic Electronics&Information Displays and Institute of Advanced Material Nanjing University of Posts and Telecommunications

By using p-bis（p - N, N-diphenyl-aminostyryl）benzene doped 2-tert-butyl-9, 10-bis-β-naphthyl）-anthracene as an emitting layer, we fabricate a high-efficiency and long-lifetime blue organic light emitting diode with a maximum external quantum efficiency of 6.19% and a stable lifetime at a high initial current density of 0.0375 A/cm2. We demonstrate that the change in the thicknesses of organic layers affects the operating voltage and luminous efficiency greater than the lifetime. The lifetime being independent of thickness is beneficial in achieving high-quality full-colour display devices and white lighting sources with multi-emitters.

关键词： organic light-emitting diode blue emission lifetime organic layers thickness

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Exciplex formation and electroluminescent absorption in ultraviolet organic light-emitting diodes

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Chinese Physics B 2015年第2期24卷 253-258页

作者：张琪张浩张小文徐韬魏斌 School of Materials Science and Engineering & Key Laboratory of Advanced Display and System Applications Ministry of EducationShanghai University Guangxi Key Laboratory of Information Materials Guilin University of Electronic Technology

We investigated the formation of exciplex and electroluminescent absorption in ultraviolet organic light-emitting diodes（UV OLEDs） using different heterojunction *** is found that an energy barrier of over 0.3 eV between the emissive layer（EML） and adjacent transport layer facilitates exciplex *** electron blocking layer effectively confines electrons in the EML,which contributes to pure UV emission and enhances *** change in EML thickness generates tunable UV emission from 376 nm to 406 *** addition,the UV emission excites low-energy organic function layers and produces photoluminescent *** UV OLED,avoiding the exciplex formation and averting light absorption can effectively improve the purity and efficiency.A maximum external quantum efficiency of 1.2%with a UV emission peak of 376 nm is realized.

关键词： exciplex tunable UV emission electroluminescent absorption

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Fast mode decision algorithm for extended macroblock motion estimation in key technology areas

Fast mode decision algorithm for extended macroblock motion ...

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作者： Shen, Liquan Zhang, Zhaoyang Shanghai University Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai 200072 China

Block sizes larger than the traditional 16×16 macroblock (MB) structure and extended macroblock (EMB) size motion estimation (ME) are introduced in joint model key technology areas software to improve the inter block coding efficiency. Similar to H.264, variable size motion estimation (VS-ME) is still adopted for each 16×16 MB including 16×16, 16×8, 8×16, 8×8, 8×4, 4×8, and 4×4. EMB size ME and VS-ME achieve the highest possible coding efficiency, but result in extremely large coding time which obstructs it from practical use. A fast mode decision algorithm for EMBs based on motion homogeneity is proposed to reduce the computational complexity of ME. The basic idea of the proposed method is to utilize the spatial property of motion field in prediction where EMB size ME and small size ME (including 8×8, 8×4, 4×8 and 4×4) are needed, and only in these regions EMB size ME and small size ME are enabled. The motion field is generated by the corresponding motion vectors in spatial window. Simulation results show that the proposed algorithm can save 55% average computational complexity, with negligible loss of coding efficiency. © 2012 SPIE and IS&T.

关键词： Motion estimation

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AMOLED Encapsulation Technology and Prospect

AMOLED Encapsulation Technology and Prospect

引用

International Conference on display Technology, ICDT 2018

作者： Ao, Wei Li, Chunhong Wang, Yan Liu, Xiangchao Xin, Xiaogang Gao, Feng Peng, Chaochi Zhang, Jianhua Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai University Shanghai200072 China

ISBN: (纸本)9781510867659

The flexible organic light emitting diodes (OLEDs) has attracted a lot of attention because of its very wide and promising application prospect. The flexible encapsulation is a most problem for mass production of flexible OLEDs since their sensitivity to water and oxygen. Traditional flexible encapsulation using plasma enhanced chemical vapor deposition (PECVD) film as the inorganic layer. However owing to the complicated pattern of sub-layer and particles, the poor step coverage of PECVD film results in bad encapsulation properties. Therefore the plasma enhanced atomic layer deposition (PEALD) is studied on account of its better step coverage and lower growth temperature. Firstly, the PECVD SiNx process has been researched to achieve the low water vapor transmission rate (WVTR) (WVTR*10-4g m-2day-1) and low stress ( © 2018 SID.

关键词： Plasma enhanced chemical vapor deposition

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