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Molecular dynamics simulation of water vapor barrier properties for silicon nitride deposited by PECVD

Journal of Alloys and Compounds 2025年 1032卷

作者： Tian, Boqing Wu, Majiaqi Yang, Xiaoni Guo, Zhengrong Yang, Lianqiao School of Microelectronics Shanghai University Chengzhong Road 20 Shanghai201800 China Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Yanchang Road 149 Shanghai200072 China School of Energy Engineering Yulin University Chongwen Road 51 Shanxi Yulin719000 China

Silicon nitride (SiNx) films are widely used as encapsulation materials for flexible organic light-emitting diodes (OLEDs) in the field of microelectronics fabrication, where the water vapor transmission rate (WVTR) is a key index for evaluating the performance of encapsulation materials. In this paper, molecular dynamics (MD) simulations were used to investigate the WVTR characteristics of SiNx films prepared by plasma-enhanced chemical vapor deposition (PECVD) process. The film models used are from MD simulations of PECVD deposited SiNx films, aiming to reflect the actual properties of the films more accurately. Through the MD simulation and experimental analysis of SiNx films at different deposition temperatures, this paper explores the effects of the film characteristics, such as density, free volume, water contact angle, and surface roughness, on the WVTR. The results show that the WVTR, free volume, and surface roughness of the films show a decreasing trend with increasing deposition temperature, while their density and water contact angle increase. These findings provide important insights for a deeper understanding of the main influencing factors on the WVTR of SiNx films under the PECVD process, and provide theoretical support for further improving the performance of flexible OLED packaging materials, optimizing the PECVD process, and realizing cost-effective improvements. © 2025 Elsevier B.V.

关键词： Plasma enhanced chemical vapor deposition

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Optical Optimization of Deep Submersible LED Light on Silicone Package

Optical Optimization of Deep Submersible LED Light on Silico...

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International Conference on (ICEPT) Electronic Packaging Technology

作者： Pinhan Huang Tong Chen Luqiao Yin Tingting Zhao Jianhua Zhang Key Laboratory of Advanced Display and System Applications (Shanghai University) Shanghai China

ISBN: (数字)9781728150642

ISBN: (纸本)9781728150659

Deep submersible lighting with LED as the light source commonly used sapphire glass as a pressure-resistant transparent window, but the refractive index of sapphire glass is 1.76~1.78, which will produce sizeable specular reflection at the interface with air, resulting in loss of light energy. To solve this problem, a method of encapsulating a sapphire mirror to form an anti-reflection layer using optical silica gel has been proposed. Through the calculation and selection of suitable optical silica gel, the structural design and preparation process of silica gel anti-reflection is completed. Finally, optical simulation analysis by TracePro, it was found that the use of IVS4542 silica gel with a refractive index of 1.41 can increase the light transmittance of the lamp by 2.08%.

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Bias-Switchable Dual-Mode Organic Photodetector with High Operational Stability Using Self-Trapped Cs3Cu2I5Interfacial Layer

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Angewandte Chemie 2024年第30期136卷

作者： Zitong Zhang Junchuan Liu Lin Wang Qi Wei Mingjie Li Chunxiong Bao Qingzhen Bian Laboratory of Advanced Quantum Bio-optoelectronics (LAQB) State Key Laboratory of Fluorine & Nitrogen Chemicals Xi'an Modern Chemistry Research Institute Xi'an 710065 China Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai University Shanghai 200072 China Department of Applied Physics The Hong Kong Polytechnic University Hong Kong 999077 China National Laboratory of Solid State Microstructures School of Physics Nanjing University Nanjing 210093 China

Conventional photovoltaic (PV)-photodetectors are hard to detect fainted signals, while photomultiplication (PM)-capable devices indispensable for detecting weak light and are prone to degrade under strong light illumination and large bias, and it is urgent to realize highly efficient integrated detecting system with both PM and PV operation modes. In this work, one lead-free Cs 3 Cu 2 I 5 nanocrystals with self-trapping exciton nature was introduced as interfacial layer adjacent to bulk and layer-by-layer heterojunction structure, and corresponding organic photodetectors with bias-switchable dual modes are demonstrated. The fabricated device exhibits low operating bias (0 V for PV mode and 0.8 V for PM mode), high specific detectivity (~10 13 Jones), fast response speed as low as 1.59 μs, large bandwidth over 0.2 MHz and long-term operational stability last for 4 months in ambient condition. This synergy strategy also validated in different materials and device architectures, providing a convenient and scalable production process to develop highly efficient bias-switchable multi-functional organic optoelectrical applications.

关键词： organic photodetectors photomultiplication and photovoltaic modes operational stability self-trapped lead-free perovskite nanocrystal interfacial charge transfer

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Design of intelligent temperature control driving circuit for high power LED array

Design of intelligent temperature control driving circuit fo...

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16th China International Forum on Solid State Lighting & 2019 International Forum on Wide Bandgap Semiconductors (第十六届中国国际半导体照明论坛暨2019国际第三代半导体论坛)

作者： Fei Wang Houda Zhou Jingjing Liu Luqiao Yin Jianhua Zhang Key Laboratory of Advanced Display and System Applications Shanghai UniversityMinistry of Education Shanghai Electric Power University Shanghai200090China Key Laboratory of Advanced Display and System Applications Shanghai UniversityMinistry of Education

ISBN: (数字)9781728157566

ISBN: (纸本)9781728157573

A new type of high-power underwater lighting LED driver circuit is *** design studies and designs the electrical performance stability,temperature regulation and LED array arrangement of LED array *** temperature control mainly uses the temperature sensor module for detection,and the temperature feedback is timely performed by the *** the temperature reaches the set temperature gradient threshold,the PWM is adjusted in time to adjust the current to achieve the brightness *** purpose of heat generation is to adjust the temperature;the other point is mainly to design the voltage regulator circuit *** stability of the circuit is very important for the LED array circuit and the peripheral circuit in this design,which also becomes the judgment *** of the key *** paper mainly designs the circuit stability for input voltage regulation and temperature control *** illumination flux will also have certain requirements,LED array arrangement is also very *** the simulation experiment,the hexagonal array arrangement is *** the above three points,a high-power LED driver circuit is ***,through the specific experiment to verify the operation of the circuit,the overall operation of the circuit is good,the dimming,voltage regulation is good and the efficiency is high,and the design goal is achieved.

关键词： LED array voltage regulation temperature regulation efficiency

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Synthesis and properties of novel N,C,N terdentate skeleton based on 1,3-di(pyridin-2-yl)benzene moiety-new tricks for old dogs

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Chinese Chemical Letters 2019年第11期30卷 1951-1954页

作者： Shuai Tan Xiugang Wu Yanqiong Zheng Yafei Wang a Jiangsu Engineering Laboratory of Light-Electricity-Heat Energy-Converting Materials and Applications Jiangsu Key Laboratory of Environmentally Friendly Polymeric MaterialsJiangsu Collaboration Innovation Center of Photovoltaic Science and EngineeringSchool of Materials Science&EngineeringChangzhou UniversityChangzhou 213164China b College of Chemistry Key Lab of Environment-Friendly Chemistry and Application of the Ministry of EducationXiangtan UniversityXiangtan 411105China c Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai UniversityShanghai 200072China

Utilization of intermolecular Friedel-Crafts and intramolecular condensation reaction,novel 1,3-di-(pyridine-2-yl)benzene(N,C,N terdentate)skeleton with electro-withdrawing group in 6'position of pyridyl and a cyclization between 6'position of pyridyl and 6 position of benzyl ring were firstly designed and *** structures of these novel N,C,N terdentate were confirmed by NMR,MS and X-ray single *** photophysical properties of these compounds were briefly explored.

关键词： 1,3-Di(pyridin-2-yl)benzene skeleton Platinum complex Synthesis Intramolecular cyclization

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Deep-Blue Electroluminescence of Perovskites with Reduced Dimensionality Achieved by Manipulating Adsorption-Energy Differences

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Angewandte Chemie 2022年第40期134卷

作者： Dr. Jianchao Dong Dr. Feifei Lu Dr. Dongyuan Han Dr. Jie Wang Dr. Ziang Zang Dr. Lingmei Kong Dr. Yu Zhang Dr. Xue Ma Dr. Jianheng Zhou Dr. Huiyu Ji Prof. Xuyong Yang Prof. Ning Wang Key Laboratory of Physics and Technology for Advanced Batteries of Ministry of Education College of Physics Jilin University Changchun 130012 P. R. China Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai University 149 Yanchang Road Shanghai 200072 P. R. China

The lagging development of deep-blue perovskite light-emitting diodes (PeLEDs) heavily impedes their practical applications in full-color display due to the absence of spectrally stable emitters and the mismatch of carrier injection capacity. Herein, we report highly efficient deep-blue PeLEDs through a new chemical strategy that addresses the dilemma for simultaneously constant electroluminescence (EL) spectra and high-purify phase in reduced-dimensional perovskites. The success lies in the control of adsorption-energy differences between phenylbutylamine (PBA) and ethylamine (EA) interacting with perovskites, which facilitates narrow n -value distribution. This approach leads to an increased exciton binding energy and enhanced surface potential, hence improving radiative recombination. As a result, an external quantum efficiency of 4.62 % is achieved in PeLEDs with a stable EL peak at 457 nm, demonstrating the best reported result for deep-blue PeLEDs so far.

关键词： Adsorption Energy Deep-Blue Emission Perovskites Reduced Dimensionality

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High color rendering index white LEDs fabricated using InP/ZnS green-emitting quantum dots and InP/ZnSe/ZnS red-emitting quantum dots

High color rendering index white LEDs fabricated using InP/Z...

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16th China International Forum on Solid State Lighting & 2019 International Forum on Wide Bandgap Semiconductors (第十六届中国国际半导体照明论坛暨2019国际第三代半导体论坛)

作者： Doudou Zhang Yuxian Yan Fan Cao Gongli Lin Xuyong Yang Wanwan Li Luqiao Yin Jianhua Zhang School of Materials Science and Engineering Shanghai UniversityShanghai 200072China Key Laboratory Key Laboratory of Advanced Display and System Applications Shanghai UniversityMinistry of Education State Key Lab of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao T Key Laboratory of Advanced Display and System Applications Shanghai UniversityMinistry of Education Key Laboratory of Advanced Display and System Applications Shanghai UniversityMinistry of Education

ISBN: (数字)9781728157566

ISBN: (纸本)9781728157573

Quantum dots(QDs)have the advantages of spectrally adjustable,high quantum yield and narrow half-peak width,and are the most potential light-converting materials for white light that achieve high color rendering index and high *** InGaN blue light chip currently used excites Ce-doped yttrium aluminum garnet(YAG: Ce3+)yellow phosphor,and the white light-emitting diode(WLED)realized exhibits color rendering index(CRI)<80 and an unsatisfactory color coordinate because of lack of red spectral *** order to improve the CRI of white LEDs,in this paper,we fabricated InP/ZnS green-emitting QDs and InP/ZnSe/ZnS red-emitting QDs,and excited YAG: Ce3+yellow phosphor,InP/ZnS green-emitting QDs and InP/ZnSe/ZnS red-emitting QDs with blue chip,made WLED(Ⅰ),and compared with WLED(Ⅱ)generated by using blue LED chip to excite YAG: Ce3+yellow *** result shows that the WLED(Ⅰ)achieves a CRI of 90.3 at a driving current of 5 *** Commission International de L'Eclairage(CIE)chromaticity coordinates are(0.3393,0.3342),and the correlated color temperature(CCT)is 5186K,which is high quality white light close to sunlight.

关键词： Light emitting diodes II-VI semiconductor materials Zinc compounds Phosphors Color Indium phosphide III-V semiconductor materials

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Influence of thermal annealing-induced molecular aggregation on film properties and photovoltaic performance of bulk heterojunction solar cells based on a squaraine dye

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Frontiers of Materials Science 2018年第2期12卷 139-146页

作者： Pengpeng ZHANG Zhitian LING Guo CHEN Bin WEI School of Materials Science and Engineering Shanghai University Shanghai 200072 China Key Laboratory of Advanced Display and System Applications (Ministry of Education) Shanghai University Shanghai 200072 China

Squaraine （SQ） dyes have been considered as efficient photoactive materials for organic solar cells. In this work, we purposely controlled the molecular aggregation of an SQ dye, 2,4-bis[4-（N,N-dibutylamino）-2-dihydroxyphenyl] SQ （DBSQ- （OH）2） in the DBSQ（OH）2：[6,6]-phenyl-Cel-butyric acid methyl ester （PCBM） blend film by using the thermal annealing method, to study the influence of the molecular aggregation on film properties as well as the photovoltaic performance of DBSQ（OH）2：PCBM-based bulk heterojunction （BHJ） solar cells. Our results demonstrate that thermal annealing may change the aggregation behavior of DBSQ（OH）2 in the DBSQ（OH）2：PCBM film, and thus significantly influence the surface morphology, optical and electrical properties of the blend film, as well as the photovoltaic performance of DBSQ（OH）2：PCBM BHJ cells.

关键词： organic solar cells squaraine dye molecular aggregation film properties power conversion efficiency

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Design and Analysis of Cylindrical Liquid Lens Based on Electrowetting

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Guangxue Xuebao/Acta Optica Sinica 2025年第10期45卷

作者： Zhou, Le Ma, Xiangteng Zhao, Wenfeng Li, Xifeng Key Laboratory of Advanced Display and System Applications Ministry of Education School of Mechatronic Engineering and Automation Shanghai University Shanghai200072 China Kunshan Xuanrou Optoelectronics Technology Co. Ltd. Jiangsu Suzhou215300 China

Objective Cylindrical lenses, with their unique ability to focus light in a single dimension, are critical for applications such as beam shaping and improving illumination uniformity. However, most existing research on electrowetting-based liquid lenses focuses on spherical configurations, leaving cylindrical variants underexplored. These cylindrical lenses face challenges such as high driving voltages, limited focal ranges, and structural inefficiencies. In this paper, we address these challenges by proposing a novel cylindrical electrowetting liquid lens design featuring a conical cavity with segmented dielectric layers. Our approach aims to advance cylindrical liquid lens technology for compact optical systems, targeting low-voltage operation (35 ‒ 55 V), wide focal length tunability (139 ‒ 999 mm), and enhanced optical performance. We provide foundational insights for applications in laser processing, optical sensing, and medical imaging by bridging theoretical advancements with practical implementation. Methods We employ a multidisciplinary approach combining theoretical analysis, numerical simulations, and experimental validation. The lens structure incorporates a conical cavity with alternating thick (15 µm) and thin (3 µm) dielectric layers [Fig. 1(d)], enabling asymmetric liquid interface control based on the Young-Lippmann equation (Eq. 1). Theoretical modeling establishes the relationship between applied voltage and interface curvature, while a fifth-degree polynomial (Eq. 2) ensures high-precision fitting of simulated interface profiles (R2>0.98, Table 1). COMSOL Multiphysics 6.0 simulates voltage-dependent interface deformations (Fig. 2), and Zemax evaluates optical performance, including focal length, aberrations, and field curvature (Figs. 6 and 7). Fabrication involves photolithography and parylene-C deposition to create dielectric layers (Fig. 8), followed by experimental testing using a laser-CCD setup to measure focal length indirectly via spot wi

关键词： Fiber optic sensors

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P-13.3: Efficient Blue and Color Tunable White OLED Based on Platinum Complex

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SID Symposium Digest of Technical Papers 2021年第S1期52卷

作者： Jianfeng Guo Zhangcheng Liao Rongrong Xia Hong Lin Zixing Wang Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University 149 Yanchang Rd. Shanghai 200072 P. R. China

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