- 作 者: ( "zongtao li" OR "zong-tao li" )
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Manufacturing a high-transmittance quantum-dot pixel frame using magnetic field and vibration field composite stampingJournal of Materials Processing Technology (IF 6.162) Pub Date : 2023-01-13 ,DOI:10.1016/j.jmatprotec.2023.117873Zong-Tao Li, Jia-Yong Qiu, Jia-Sheng Li, Qi-Liang Zhao, Rui-Xiang Qian, Zi-Hao DengA simple way to complement full-color micro-light-emitting diode (micro-LED) displays is to employ ultraviolet or blue micro-LEDs with quantum dot (QD) converters. A pixel frame is essential for precisely locating the QD converter on a micro-LED chip and to limit the optical cross-talk effect. The limitations of pixel frames prepared by the commonly-used lithography technique, such as shallow depth ...
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Effect of multi-interface patterns on the light-outcoupling of perovskite light-emitting diodesApplied Physics Letters (IF 3.971) Pub Date : 2023-01-10 ,DOI:10.1063/5.0133472Zong-Tao Li, Jia-Yong Qiu, Jia-Sheng Li, Xue-Wei Du, Ze-Long Li, Hong-Wei Zhang
Patterned structures in perovskite light-emitting diodes (PeLEDs) contribute to improved external quantum efficiency; however, unsatisfactory light outcoupling resulting from multi-interface optical loss remains a primary and unsolved challenge. This study investigated the effect of multi-interface patterns on the light outcoupling of PeLEDs using a SiO2-microcolumn pattern (SMP). It was found that
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Boosted Ambient Contrast Ratio of Light-Emitting Diode Display Devices With High Light Output Using a Laminated Interlaced Microgroove Janus StructureIEEE Transactions on Electron Devices (IF 3.221) Pub Date : 2022-12-29 ,DOI:10.1109/ted.2022.3231228Zongtao Li, Yunlong Zhang, Guanwei Liang, Fengyi Zhang, Jiasheng LiA high ambient contrast ratio (ACR) and brightness are critical for realizing high dynamic range (HDR) in advanced display applications. However, improving the ACR while maintaining high light output for display devices is still challenging. To solve this issue, we proposed a laminated interlaced microgroove (LIM) Janus structure, consisting of intersecting microgrooves cutting through the extinction ...
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A particle morphology characterization system and its method based on particle scattering image recognitionOptics and Lasers in Engineering (IF 5.666) Pub Date : 2022-12-27 ,DOI:10.1016/j.optlaseng.2022.107448Xinrui Ding, Xin Liu, Changkun Shao, Bowen Chen, Weihong Li, Zongtao LiThe morphology of particles is usually detected by microscopic imaging methods such as scanning electron microscope (SEM). However, this type of direct observation relies on expensive equipment and requires complex preparations. Inspired by the transit method in astronomy, a characterization system based on the scattering patterns change due to the relative motion between the particle and facula was ...
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Manganese activated narrowband red-emitting Cs2KInF6:Mn4+ phosphor with high colour purity for backlight displayCeramics International (IF 5.532) Pub Date : 2022-08-31 ,DOI:10.1016/j.ceramint.2022.08.285Yong Liu, Shuai Cheng, Shengchun Yang, Zongtao Li, Zhenjuan Duan, Zhanjiang Hu, Zhengui Li, Yuehua Li, Lili Yu, Anzhong Peng, Xiaodong WenA series of Mn4+ doped cubic phase Cs2KInF6 red phosphors (abbreviated here as CKIFM) were obtained through a typical co-precipitation route. The optical and structural properties of this material were researched in more detail using X-ray diffraction (XRD), scanning electron microscopy (SEM), photoluminescence (PL) and photoluminescence excitation (PLE), diffuse reflectance spectroscopy (DRS), temperature-dependent ...
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Enhancing Optical Performance for White Light-Emitting Diodes Using Quantum- Dots/Boron Nitride Hybrid Reflective StructureIEEE Transactions on Electron Devices (IF 3.221) Pub Date : 2022-08-09 ,DOI:10.1109/ted.2022.3195476Zhaoshu Cai, Guanwei Liang, Yunlong Zhang, Caiman Yan, Yaoxing Song, Jiasheng Li, Zongtao LiQuantum dots (QDs) are usually used with phosphor to obtain white light-emitting diodes (WLEDs) due to their excellent lighting characteristics. For lighting effect improvement, the QDs layer and the phosphor layer are supposed to be separated to reduce reabsorption loss and enhance QDs stability. Based on the separated structure, a QDs/boron nitride hybrid reflective (QBHR) structure is proposed to ...
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Enhancing thermal and optical properties for liquid quantum-dot-based self-loop system toward laser illumination by controlling the layer locationJournal of Luminescence (IF 4.171) Pub Date : 2022-08-04 ,DOI:10.1016/j.jlumin.2022.119151Xinrui Ding, Yaoxing Song, Xueting Tang, Liang Xu, Yikai Yuan, Yuxin Wei, Zongtao LiWhite light sources based on laser diodes are considered to be the next-generation light sources owing to their high luminous efficiency, high luminous flux, and excellent directivity. Quantum dots (QDs) are new fluorescent materials that have been widely used in lighting and displays. However, when used for high-power illumination, QDs excitation and emission are accompanied by obvious attenuation ...
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A fluorescence probe of sulfur quantum dots for sensitive detection of copper ions in Paris polyphylla var. yunnanensisMicrochemical Journal (IF 5.304) Pub Date : 2022-05-29 ,DOI:10.1016/j.microc.2022.107639Anqi Huang, Xiaofang Yang, Ting Xia, Daichun He, Rui Zhang, Zongtao Li, Shengchun Yang, Yong Liu, Xiaodong WenThe excessive residue of copper ion (Cu2+) has an important impact on the quality of traditional Chinese medicine (TCM). In this work, a sulfur quantum dots (SQDs) fluorescent probe was developed for rapid and sensitive detection of Cu2+ in Paris polyphylla. Smith var. yunnanensis (Franch.) Hand. -Mazz. (P. polyphylla var. yunnanensis). SQDs were synthesized by the “assemble-fission” method. The synthesized ...
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Perovskite-Gallium Nitride Tandem Light-Emitting Diodes with Improved Luminance and Color TunabilityAdvanced Science (IF 17.521) Pub Date : 2022-05-21 ,DOI:10.1002/advs.202201844Zong-Tao Li, Hong-Wei Zhang, Jia-Sheng Li, Kai Cao, Ziming Chen, Liang Xu, Xin-Rui Ding, Bin-Hai Yu, Yong Tang, Jian-Zhen Ou, Hao-Chung Kuo, Hin-Lap Yip
Tandem structures with different subpixels are promising for perovskite-based multicolor electroluminescence (EL) devices in ultra-high-resolution full-color displays; however, realizing excellent luminance- and color-independent tunability considering the low brightness and stability of blue perovskite light-emitting diodes (PeLEDs) remains a challenge. Herein, a bright and stable blue gallium nitride
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Thermal and optical investigations of self-loop system based on liquid quantum dots for laser lightingOptics & Laser Technology (IF 4.939) Pub Date : 2022-04-14 ,DOI:10.1016/j.optlastec.2022.108175Xinrui Ding, Yaoxing Song, Xueting Tang, Liang Xu, Yikai Yuan, Yuxin Wei, Zongtao LiThis study proposes a self-loop converter (SLC) based on liquid quantum dots (QDs) that is designed for laser lighting. QDs exhibit unique illumination and display advantages because of their high light conversion efficiency and color purity. However, the unavoidable heat generated during light conversion leads to thermal quenching and limits their application in high-power laser lighting. The proposed ...
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Synthesis and optical properties of a new double-perovskite Rb2KInF6:Mn4+ red phosphor used for blue LED pumped white lightingOptical Materials (IF 3.754) Pub Date : 2022-04-12 ,DOI:10.1016/j.optmat.2022.112307Yong Liu, Anqi Huang, Shengchun Yang, Zhenjuan Duan, Zhengui Li, Zongtao Li, Hai Lan, Anzhong Peng, Xiaodong Wen, Zhengliang WangHigh-efficiency narrow-band red phosphor plays a profound part in stimulating illumination quality for white light-emitting diodes (WLEDs). In this work, a series of novel double-perovskite Rb2KInF6:Mn4+ red phosphors was successfully prepared by using a facile co-precipitation technique. The crystallization, particle morphology, photoluminescence properties, and thermal quench behavior of the as-synthesized ...
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Age and residential differences in functional fitness of Chinese older womenAustralasian Journal on Ageing (IF 1.876) Pub Date : 2022-03-01 ,DOI:10.1111/ajag.13037Zongtao Li, Qin Lai, Ronald J. Benedict, Tao Yang, Xuelin ZhangTo investigate age-associated changes in functional fitness (FF) among Chinese older women and to identify any urban-rural disparity. ...
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Photothermal Optimization of Quantum Dot Converters for High-Power Solid-State Light SourcesAdvanced Optical Materials (IF 10.05) Pub Date : 2022-02-21 ,DOI:10.1002/adom.202102201Jiexin Li, Zongtao Li, Jiayong Qiu, Jiasheng LiQuantum dots (QDs) exhibit remarkable photoelectric performance. However, the conversion efficiency and thermal performance of QD converters so far is not satisfactory for high-power solid-state light (SSL) applications owing to the serious reabsorption loss of QDs and the poor thermal diffusion of polymer materials. Here, an efficient QD converter based on an anodic aluminum membrane (AAM), with high ...
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The kapok petal: superhydrophobic surface induced by microscale trichomesBioinspiration & Biomimetics (IF 2.985) Pub Date : 2022-02-03 ,DOI:10.1088/1748-3190/ac392eJunchi Chen, Shudong Yu, Ting Fu, Liang Xu, Yong Tang, Zongtao LiFor the first time it is reported that the kapok petal shows a superhydrophobic characteristic with a static water contact angle higher than 150°. Intriguingly, there exist single-scale micro-trichomes and no more nanocrystals on a kapok petal in contrast to most natural superhydrophobic surfaces with hierarchical morphologies, such as the lotus leaf and rose petal. Experimental results show that the ...
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Biomimetic Porous Fluoropolymer Films with Brilliant Whiteness by Using Polymerization‐Induced Phase Separation (Adv. Mater. Interfaces 1/2022)Advanced Materials Interfaces (IF 6.389) Pub Date : 2022-01-01 ,DOI:10.1002/admi.202270001Binhai Yu,Zijian Huang,Dong Fang,Shudong Yu,Ting Fu,Yong Tang,Zongtao Li
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Polystyrene-Fiber-Rod Hybrid Composite Structure for Optical Enhancement in Quantum-Dot-Converted Light-Emitting DiodesACS Applied Polymer Materials (IF 4.855) Pub Date : 2021-12-10 ,DOI:10.1021/acsapm.1c01022Guanwei Liang, Yong Tang, Peisen Chen, Jiasheng Li, Yikai Yuan, Shudong Yu, Liang Xu, Zongtao LiHigh-haze optical polymer diffusers have attracted great attention in terms of application in surface color-conversion films for lighting and displays. An optical diffuser based on polystyrene-fiber rods (PFRs) dispersed in polydimethylsiloxane (PDMS) resin is presented in this study. Using a simple electrospinning and emulsion shear fabrication process, composite films having optical diffusion properties ...
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Biomimetic Porous Fluoropolymer Films with Brilliant Whiteness by Using Polymerization-Induced Phase SeparationAdvanced Materials Interfaces (IF 6.389) Pub Date : 2021-11-19 ,DOI:10.1002/admi.202101485Binhai Yu, Zijian Huang, Dong Fang, Shudong Yu, Ting Fu, Yong Tang, Zongtao LiInspired by the Cyphochilus scale with extreme whiteness, fluoropolymer is used as the matrix to prepare highly scattering porous polymer films through polymerization-induced phase separation (PIPS) method. The mixture used for the PIPS technique contains a fluoride monomer, a UV photoinitiator, and porogens (cyclohexanol and perfluorooctanol). By carefully tuning the mixture parameters (cyclohexa ...
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A Luminous Efficiency-Enhanced Laser Lighting Device with a Micro-Angle Tunable Filter to Recycle Unconverted Blue Laser RaysMicromachines (IF 3.523) Pub Date : 2021-09-23 ,DOI:10.3390/mi12101144Xinrui Ding, Ruixiang Qian, Liang Xu, Zongtao Li, Jiasheng Li, Caiman Yan, Binhai Yu
In this work, a phosphor converter with small thickness and low concentration, based on a micro-angle tunable tilted filter (ATFPC), was proposed for hybrid-type laser lighting devices to solve the problem of silicone phosphor converters’ carbonizing under high-energy density. Taking advantage of the filter and the scattering characteristics of microphosphors, two luminous areas are generated on the
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Optical Performance and Moisture Stability Enhancement of Flexible Luminescent Films Based on Quantum-Dot/Epoxy Composite ParticlesNanomaterials (IF 4.324) Pub Date : 2021-08-18 ,DOI:10.3390/nano11082100Guanwei Liang, Yong Tang, Jiarui Huang, Jiasheng Li, Yikai Yuan, Shu Yang, Zongtao Li
Quantum dots (QDs) have been widely applied in luminescent sources due to their strong optical characteristics. However, a moisture environment causes their quenching, leading to an inferior optical performance in commercial applications. In this study, based on the high moisture resistance of epoxy resin, a novel epoxy/QDs composite particle structure was proposed to solve this issue. Flexible luminescent
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Water-stable CsPbBr3 perovskite quantum-dot luminous fibers fabricated by centrifugal spinning for dual white light illumination and communicationPhotonics Research (IF 7.254) Pub Date : 2021-07-29 ,DOI:10.1364/prj.427066Binhai Yu, Shunming Liang, Fengyi Zhang, Zongtao Li, Bin Liu, and Xinrui DingLead halide perovskite quantum dots (PQDs) display remarkable photoelectric performance. However, defects such as weak stability in air and water environments limit the development of lead halide PQDs in solid-state light applications. Herein, centrifugal spinning is used for the fabrication of stable luminous CsPbBr3 PQD nanofibers. After immersion in water for 11 months, the PQD fibers still maintained ...
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Enhanced Photoluminescence Intensity of Quantum Dot Films With the Sandwich Column Array Structure by Uniform Electrical InductionIEEE Transactions on Electron Devices (IF 3.221) Pub Date : 2021-07-26 ,DOI:10.1109/ted.2021.3096924Binhai Yu, Qiliang Zhao, Qinhao Li, Jiasheng Li, Zongtao LiQuantum dots (QDs) are ideal color-conversion materials for display fields. Preparation of micro-nanostructures is a mainstream method for obtaining a high photoluminescence (PL) intensity. Electrical induction, a method of preparing micro-nanostructures, was introduced to obtain QD films with high PL performance by preparing a sandwich column array structure (SCAS). By changing the spacer thickness ...
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Experimental investigation on wettability and capillary performance of ultrasonic modified grooved aluminum wicksInternational Journal of Heat and Mass Transfer (IF 5.431) Pub Date : 2021-07-12 ,DOI:10.1016/j.ijheatmasstransfer.2021.121642Guisheng Zhong, Yong Tang, Xinrui Ding, Gong Chen, Zongtao LiThe grooved wick has a promising potential in the field of ultra-thin flat heat pipes, and the porous structure can improve the capillary performance of grooved wicks significantly. In this paper, an environmentally friendly method, named as ultrasonic modification, was developed to fabricate porous microstructures on grooved aluminum wick. The effects of ultrasonic modification times on the morphology ...
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Enhanced Optical and Thermal Performance of QD White LEDs Using a Centrifugation Packaging StructureIEEE Photonics Technology Letters (IF 2.414) Pub Date : 2021-06-17 ,DOI:10.1109/lpt.2021.3090058Zongtao Li, Jialong Zheng, Jiasheng Li, Wangting Zhan, Yuchen ChenIn this study, we propose a centrifugation packaging (CP) structure to enhance the optical and thermal dissipation performance of LEDs, using SBA-15 particles to facilitate the sedimentation and dispersion of QDs. The results indicate that the EL spectra of the LEDs remains almost unchanged after the centrifugation time of 60 min and a CP structure can be obtained. The radiation power and luminous ...
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Study on Convective Flow Behaviors of Phosphor Particles During Curing Process of Silicone and the Influences on the Optical Performance of White LEDsIEEE Transactions on Electron Devices (IF 3.221) Pub Date : 2021-04-26 ,DOI:10.1109/ted.2021.3072983Xinrui Ding, Changkun Shao, Ziming Peng, Binhai Yu, Zongtao Li, Shu YangThe correlated color temperature (CCT) variation of the phosphor-converted light-emitting diodes (LEDs) after curing is a common phenomenon. In the past, it was believed that the phenomenon was caused by the sedimentation of phosphor particles. However, not only sedimentation, but these particles can also flow with the natural convection of silicone because of nonuniform heating during curing. The ...
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Unraveling the Origin of Low Optical Efficiency for Quantum Dot White Light-Emitting Diodes From the Perspective of Aggregation-Induced Scattering EffectIEEE Transactions on Electron Devices (IF 3.221) Pub Date : 2021-03-09 ,DOI:10.1109/ted.2021.3060698Zong-Tao Li, Jie-Xin Li, Zi-Hao Deng, Jia-Yong Liang, Jia-Sheng LiQuantum dots (QDs) are promising materials for various optoelectronic applications. However, the efficiency of QD white light-emitting diodes (QD-white-LEDs) is not at the desired level, particularly when the QD concentration in the silicone matrix is high and the corresponding mechanism has not been fully elucidated. In this study, we experimentally and theoretically investigated the aggregation-induced ...
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Highly Efficient Liquid-Quantum Dot/Melamine- Modified Urea-Formaldehyde Microcapsules for White Light-Emitting DiodesIEEE Electron Device Letters (IF 4.816) Pub Date : 2021-02-02 ,DOI:10.1109/led.2021.3056583Hong Wang, Yong-Heng Xing, Jie-Xin Li, Jing Tan, Zong-Tao Li, Chang-Hui Song, Jia-Sheng LiA liquid matrix is beneficial for improving the luminescence performance of quantum dots (QDs), although it is difficult to be packaged with light-emitting diode (LED) chips. In this study, liquid-QDs with chlorobenzene solution and melamine-modified urea-formaldehyde (MUF) were used as the core and shell structures, respectively, successfully yielding liquid-QD/MUF microcapsules for white LED packaging ...
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A Sandwich Structure Light-Trapping Fluorescence Antenna With Large Field of View for Visible Light CommunicationIEEE Transactions on Electron Devices (IF 3.221) Pub Date : 2021-02-01 ,DOI:10.1109/ted.2020.3043994Binhai Yu, Shunming Liang, Xinrui Ding, Zongtao Li, Yong TangVisible light communication (VLC) is considered as a significant technology for new-generation communication. The VLC is supposed to provide high data rates and steady network links, which has high potential in dynamic wireless network transmission such as vehicle-to-vehicle communication. However, V2V network is always dynamic, which needs the receiver of the VLC system to have a large field of view ...
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Eliminating the Residual Ultraviolet Excitation Light and Increasing Quantum Dot Emission Intensity in LED Display DevicesIEEE Transactions on Electron Devices (IF 3.221) Pub Date : 2021-02-01 ,DOI:10.1109/ted.2020.3044556Caiman Yan, Guanwei Liang, Guoquan Liu, Yong Tang, Jiasheng Li, Zong-Tao LiUltraviolet light-emitting diodes (UVLEDs) used as excitation sources for quantum dots (QDs) are promising candidates for the display field. To eliminate the residual excitation light, the conventional method is simply increasing the optical density of QDs for packaging, which would significantly reduce the luminous efficiency of QD-light-emitting diode (LED) devices owing to reabsorption loss. In ...
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Toward 200 Lumens per Watt of Quantum-Dot White-Light-Emitting Diodes by Reducing Reabsorption LossACS Nano (IF 18.027) Pub Date : 2020-12-23 ,DOI:10.1021/acsnano.0c05735Jia-Sheng Li, Yong Tang, Zong-Tao Li, Jie-Xin Li, Xin-Rui Ding, Bin-Hai Yu, Shu-Dong Yu, Jian-Zhen Ou, Hao-Chung KuoIn this study, we analyze the influence of the pore structure of an SBA-15 particle on the light emission from its inner adsorbed quantum dots (QDs) and outer light-emitting diode (LED) chips. It is found that the particle features of a high refractive index, comparable feature size of pore structure, and lower amount of QD adsorption help with QD light extraction, demonstrating a mechanism to suppress ...
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Study of the Optical Properties of Multi-Particle Phosphors by the FDTD and Ray Tracing Combined MethodPhotonics (IF 2.14) Pub Date : 2020-12-06 ,DOI:10.3390/photonics7040126Xinrui Ding, Changkun Shao, Shudong Yu, Binhai Yu, Zongtao Li, Yong Tang
It is well known that the optical properties of multi-particle phosphor are crucial to the light performance of white light-emitting diodes (LEDs). Note that the optical properties including scattering or absorption properties for a single particle are easy to be calculated. However, due to the large computation considering the complicated re-scattering and re-absorption, it is difficult to calculate
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