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The effects of co.l-stretch transition behavior of polyfluorene inks on single droplet formation during inkjet printing

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Chinese Chemical Letters 2020年第12期31卷 3216-3220页

作者： Zhonghui Du Hang Zhou Weiran Cao Xinhong Yu Yanchun Han shenzhen Key Lab of Thin Film Transistor and Advanced display Peking Umiverity Sshenzhen Craduate chool Peking UniversityShenzhen 518055China shenzhen china star Optoelectronic semiconductor display technology co. Ltd.Shenzhen518132 China State Key Laboratory of Polymer Physics and Chermistry Changchun Iistitute of Appied ChemistryChinese Academy of Scences.Chngzchun 130022China

For drop-on-demand(DOD)inkjet printing,stable and single ink droplet fo rmation without satellite dots is the key to improve the print *** formation of stable and single droplet is influenced by filament break up and the polymer chain’s co.l-stretch transition *** this paper,the droplet formation behaviors of polyfluorene(PFO)ink at various driving voltages(V),polymer chain’s co.l-stretch transition mechanism and its effects on single ink droplet formation are *** indicates that when 5863 V,Wi>0.5,the PFO molecular chain is stretched because of the high hydrodynamic forces,resulting unwanted satellite *** 55

关键词： Driving voltage Polyfluorene Single droplet Satellite droplets co.l-stretch

Recent research progress of master mold manufacturing by nanoimprint technique for the novel microoptics devices

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Frontiers of Materials Science 2022年第3期16卷 83-100页

作者： Yuhang LIU Jianjun LIN Zuohuan HU Guoli GAO Bingyang WANG Liuyi WANG Zhiyuan PAN Jianfei JIA Qinwei YIN Dengji GUO Xujin WANG Institute of semiconductor Manufacturing Research Shenzhen UniversityShenzhen 518060China shenzhen Silver Basis technology co. Ltd.Shenzhen 523459China Institute of Microelectronics Shenzhen UniversityShenzhen 518060China shenzhen Key Laboratory of High Performance Nontraditional Manufacturing College of Mechatronics and Control EngineeringShenzhen UniversityShenzhen 518060China

The co.sumer demand for emerging technologies such as augmented reality(AR),autopilot,and three-dimensional(3D)internet has rapidly promoted the application of novel optical display devices in innovative ***,the micro/nanomanufacturing of high-resolution optical display devices is the primary issue restricting their *** manufacturing technology of micro/nanostructures,methods of display mechanisms,display materials,and mass production of display devices are major technical *** co.prehensively understand the latest state-of-the-art and trigger new technological breakthroughs,this study reviews the recent research progress of master molds produced using nanoimprint technology for new optical devices,particularly AR glasses,new-generation light-emitting diode car lighting,and naked-eye 3D display mechanisms,and their manufacturing techniques of master *** focus is on the relationships among the manufacturing process,microstructure,and display of a new optical *** master molds are reviewed for the manufacturing and application of new optical devices,and the challenges and prospects of the new optical device diffraction grating nanoimprint technology are discussed.

关键词： master mold manufacturing nanoimprint technique augmented reality automotive lighting naked-eye 3D display

Organometallic perovskite single crystals grown on lattice-matched substrate for photodetection

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Nano Materials Science 2020年第3期2卷 292-296页

作者： Xin Wang Yuwei Li Yubing Xu Yuzhu Pan Yao Wua Guanwen Li Wei Zhang Shuyi Ding Jing Chen Wei Lei Dewei Zhao Joint International Research Laboratory of Information display and Visualization School of Electronic Science and EngineeringSoutheast UniversityNanjing210096China shenzhen china star optoelectronics semiconductor display technology co.Ltd. ShenZhen518132China School of Information Engineering Nanjing Normal University Taizhou CollegeTaizhouChina Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and co.mercialization The University of ToledoToledoOH43606United States

In this work,we demonstrate that an organometallic perovskite(OP)single crystal for effective photodetection can be grown on a gold(Au)-deco.ated substrate using liquid phase *** co.ered gold co.ld both co.trol the shape of the epitaxial layer and act as its *** MAPbCl3 single crystal and an MAPbBr1.5Cl1.5 single crystal were used as the substrate and the epitaxial layer,*** device,with an Au-perovskite-Au structure,can be fully *** to the high-quality epitaxial layer,the maximum external quantum efficiency(EQE)value is over 60%under the voltage of20 *** addition,the response speed can reach 200 and 500 ns(ns)rise and fall,*** work provides an effective and promising method to fabricate efficient perovskite-based photodetectors.

关键词： Perovskite single crystals Liquid phase epitaxy Ultraviolet detection

Alleviating the crosstalk effect via a fine-moulded light-blocking matrix for co.our-co.verted micro-LED display with a 122% NTSC gamut

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Light(Advanced Manufacturing) 2022年第3期3卷 197-204页

作者： Yongming Yin Zhiping Hu Muhammad Umair Ali Miao Duan Yongwei Wu Ming Liu Wenxiang Peng Jun Hou Dongze Li Xin Zhang Hong Meng School of Advanced Materials Shenzhen Graduate SchoolPeking UniversityShenzhen 518055China Hangzhou Institute for Advanced Study University of Chinese Academy of SciencesHangzhou 310024China Tsinghua-Berkeley shenzhen Institute(TBSI) Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China TCL china star optoelectronics technology co. Ltd.(CSOT)Shenzhen 518132China

One of the major challenges when fabricating high gamut co.our-co.verted micro-light-emitting diodes(LEDs)displays is severe crosstalk effect among adjacent pixels because of the wide view-angle feature of micro-LED *** this study,potential factors that co.tribute to the crosstalk effect were systematically *** observed that precisely filling the space between each micro-LED chip with a light blocking matrix(LBM)can be a promising solution to alleviate this *** careful investigations,a press-assisted moulding technique was demonstrated to be an effective approach of fabricating the ***,experimental observations further revealed that residual black LBM on the surface of micro-LEDs severely reduces the brightness,thereby co.promising the display *** problem was successfully addressed by employing a plasma etching technique to efficiently extract the trapped ***,a top-emitting blue micro-LED-based backlight fine-moulded with a black LBM was developed and co.bined with red and green quantum dot co.our-co.version layers for full-co.our *** co.our gamut of our manufactured display prototype can co.er as high as 122%that of the National Television Standards co.mittee.

关键词： Micro-LED Crosstalk effect Quantum dots co.or co.version Plasma etching Fine-moulding

3.6 W co.pact all-fiber Pr3+-doped green laser at 521 nm

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Advanced Photonics 2022年第5期4卷 6-14页

作者： Jinhai Zou Jinfen Hong Zhuang Zhao Qingyuan Li Qiujun Ruan Hang Wang Yikun Bu Xianchao Guan Min Zhou Zhiyong Feng Zhengqian Luo Xiamen University School of Electronic Science and EngineeringFujian Key Laboratory of Ultrafast Laser Technology and ApplicationsXiamenChina Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) XiamenChina Huawei Technologies co. Ltd.ShenzhenChina Xiamen University Shenzhen Research InstituteShenzhenChina

Green semiconductor lasers are still undeveloped,so high-power green lasers have heavily relied on nonlinear frequency co.version of near-infrared lasers,precluding co.pact and low-co.t green laser ***,we report the first Watt-level all-fiber CW Pr3t-doped laser operating directly in the green spectral region,addressing the aforementioned *** co.pact all-fiber laser co.sists of a double-clad Pr3t-doped fluoride fiber,two homemade fiber dichroic mirrors at visible wavelengths,and a 443-nm fiber-pigtailed pump *** from>10 MW∕cm2 high damage intensity of our designed fiber dielectric mirror,the green laser can stably deliver 3.62-W of co.tinuous-wave power at∼521 nm with a slope efficiency of 20.9%.To the best of our knowledge,this is the largest output power directly from green fiber lasers,which is one order higher than previously ***,these green all-fiber laser designs are optimized by using experiments and numerical *** results are in excellent agreement with our experimental results and show that the optimal gain fiber length,output mirror reflectivity,and doping level should be co.sidered to obtain higher power and *** work may pave a path toward co.pact high-power green all-fiber lasers for applications in biomedicine,laser display,underwater detection,and spectrosco.y.

关键词： fiber laser high power Pr3+-doped fiber green light

On the accurate characterization of quantum-dot light-emitting diodes for display applications

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npj Flexible Electronics 2022年第1期6卷 351-362页

作者： Wangxiao Jin Yunzhou Deng Bingbing Guo Yaxiao Lian Baodan Zhao Dawei Di Xiaowei Sun Kai Wang Shuming Chen Yixing Yang Weiran Cao Song Chen Wenyu Ji Xuyong Yang Yuan Gao Shuangpeng Wang Huaibin Shen Jialong Zhao Lei Qian Fushan Li Yizheng Jin Key Laboratory of Excited-State Materials of Zhejiang Province State Key Laboratory of Silicon MaterialsDepartment of ChemistryZhejiang University310027 HangzhouChina State Key Laboratory of Modern Optical Instrumentation College of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZhejiang University310027 HangzhouChina Department of Electronic and Electrical Engineering Southern University of Science and Technology518055 ShenzhenChina TCL Research ShenzhenGuangdongChina shenzhen china star optoelectronics semiconductor display technology co. LtdShenzhenGuangdongChina co.lege of Chemistry Chemical Engineering and Materials ScienceSoochow University199 Ren’ai Rd215123 SuzhouJiangsuChina Key Lab of Physics and technology for Advanced Batteries(Ministry of Education) College of PhysicsJilin University130023 ChangchunChina Key Laboratory of Advanced display and System Applications of Ministry of Education Shanghai University149 Yanchang RoadShanghai 200072China Najing technology co.poration Ltd Hangzhou 310052China Institute of Applied Physics and Materials Engineering University of MacaoTaipaMacaoSAR 999078China Key Laboratory for Special Functional Materials of Ministry of Education National&Local Joint Engineering Research Center for High-Efficiency Display and Lighting Technologyand Collaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifeng 475004China School of Physical Science and technology MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and MaterialsGuangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsGuangxi UniversityNanning 530004China Division of Functional Materials and Nanodevices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China co.lege of Physics and Information Engineering Fuzhou UniversityFuzhou 350108China

Quantum dot light-emitting diodes(QLEDs)are a class of high-performance solution-processed electroluminescent(EL)devices highly attractive for next-generation display *** the enco.raging advances in the mechanism investigation,material chemistry,and device engineering of QLEDs,the lack of standard protoco.s for the characterization of QLEDs may cause inaccurate measurements of device parameters and invalid co.parison of different ***,we report a co.prehensive study on the characterizations of QLEDs using various *** show that the emission non-uniformity across the active area,nonLambertian angular distributions of EL intensity,and discrepancies in the adopted spectral luminous efficiency functions co.ld introduce significant errors in the device *** errors in the operational-lifetime measurements may arise from the inaccurate determination of the initial luminance and inco.sistent methods for analyzing the luminance-decay ***,we suggest a set of reco.mended practices and a checklist for device characterizations,aiming to help the researchers in the QLED field to achieve accurate and reliable measurements.

关键词： diodes characterization luminous

Phase-pure two-dimensional Fe_(X)GeTe_(2) magnets with near-room-temperature Tc

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Nano Research 2022年第1期15卷 457-464页

作者： Govindan Kutty Rajendran Nair Zhaowei Zhang Fuchen Hou§ Ali Abdelaziem Xiaodong Xu Steve Wu Qing Yang Nan Zhang Weiqi Li Chao Zhu Yao Wu Heng Weiling Lixing Kang Teddy Salim Jiadong Zhou Lin Ke Junhao Lin Xingji Li Weibo Gao Zheng Liu School of Material Science and Engineering 50 Nanyang Ave639798Singapore Division of Physics and Applied Physics School of Physical and Mathematical SciencesNanyang Technological University21 Nanyang Link637371 Singapore Department of Physics Southern University of Science and TechnologyShenzhen 518055China Institute of Materials Research and Engineering Agency for Science Technology and Research(A*STAR)2 Fusionopolis WaySingapore 138634Singapore School of Material Science and Engineering School of PhysicsHarbin Institute of TechnologyHarbin 150001China shenzhen Key Laboratory of for Advanced Quantum Functional Materials and Devices Southern University of Science and TechnologyShenzhen 518055China National Institute of Laser Enhanced Sciences(NILES) Cairo UniversityGiza 12613Egypt CINTRA CNRS/NTU/THALES UMI3288Research Techno Plaza637553Singapore School of Electrical and Electronic Engineering Nanyang Technological University50 Nanyang Ave639798Singapore

Two-dimensional(2D)ferromagnets with out-of-plane(OOP)magnetic anisotropy are potential candidates for realizing the next-generation memory devices with ultra-low power co.sumption and high storage ***,a scalable approach to synthesize 2D magnets with OOP anisotropy directly on the co.plimentary metal-oxide semiconductor(CMOS)co.patible substrates has not yet been mainly explored,which hinders the practical application of 2D *** work demonstrates a cascaded space co.fined chemical vapor deposition(CS-CVD)technique to synthesize 2D FexGeTe_(2) *** weight fraction of iron(Fe)in the precursor co.trols the phase purity of the as-grown *** a result,high-quality Fe_(3)GeTe_(2) and Fe_(5)GeTe_(2) flakes have been grown selectively using the CS-CVD *** temperature(Tc)of the as-grown FexGeTe2 can be up to-280 K,nearly room *** thickness and temperature-dependent magnetic studies on the Fe_(5)GeTe_(2) reveal a 2D Ising to 3D XY ***,Terahertz spectrosco.y experiments on Fe_(5)GeTe_(2) display the highest co.ductivity among other FexGeTe_(2) 2D *** results of this work indicate a scalable pathway for the direct growth and integration of 2D ternary magnets on CMOS-based substrates to develop spintronic memory devices.

关键词： cascaded space co.fined chemical vapor deposition(CVD) van der Waals(vdW) ferromagnetism out of plane anisotropy iron germanium telluride terahertz