检索结果-内蒙古大学图书馆

Enhancing the response of electrowetting-based liquid lenses with an advanced overload voltage method

Optics Letters 2025年第8期50卷 2739-2742页

作者： Ma, Xiangteng Zhao, Wenfeng Li, Xifeng Zhang, Janhua 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. Suzhou215300 China

Liquid lenses based on electrowetting have a variety of applications in the fields of optics and imaging. A rapid and stable response to the applied driving voltage is crucial for the operation of such devices. This paper proposes an advanced voltage application with three-stage overload driving. This method effectively balances rapid response and stability of the liquid interface, while the conventional two-stage overload driving is associated with considerable oscillation of the liquid interface. Through simulation and experimentation of liquid lenses with different sizes, the three-stage method is identified as an efficient method to reduce the response time of the devices by optimizing the driving voltage and the duration time. © 2025 Optica Publishing Group.

关键词： Optical instrument lenses

来源：评论

学校读者我要写书评

暂无评论

Optimizing bendability of flexible electronic devices using a neutral layer strategy

引用

Moore and More 2025年第1期2卷 1-18页

作者： Wu, Majiaqi Jian, Maoliang Zhang, Jianhua Yang, Lianqiao School of Microelectronics Shanghai University Shanghai China Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Shanghai China

The neutral layer (NL) strategy is a key technique for improving the bendability of flexible electronic devices. In this study, by considering a three-layer structure as an example, the results obtained by finite element analysis (FEA) showed that the NL gradually moved to the top surface of the film as the film thickness and Young’s modulus increased, which are similar to the results produced by theoretical calculations. Subsequently, we optimized the thickness of a single NL structure and the failure bending radius of an indium tin oxide (ITO) electrode was reduced by 50% after optimization. In order to address the problems that affect the design of a single NL, we used optical clear adhesive (OCA) to generate multiple NLs. The FEA method was again applied to the structure and the results showed that decreasing the elastic modulus of the OCA and film thickness could reduce the maximum strain in the film. Finally, the effects of the OCA parameters on the protection of a multiple-layer ITO electrode structure were verified in bending experiments, which showed that the strain on ITO could be reduced from 5.6% to almost 0 in the two-electrode structure. The proposed strategies for designing single and multiple NLs can provide some guidance to facilitate optimizing the electronic infrastructure of flexible devices.

关键词：

来源：评论

学校读者我要写书评

暂无评论

3D microfluidic bubble freeze printing and its application for fabricating porous piezoelectric hydrogel

引用

Journal of Manufacturing Processes 2025年 145卷 536-544页

作者： Jin, Shaobo Liu, Zenghao Wang, Hao Ye, Guoyong Dai, Liguo Guo, Shun Guo, Yuqi Zhao, Tingting Henan Key Laboratory of Intelligent Manufacturing Mechanical Equipment Zhengzhou University of Light Industry Zhengzhou450002 China Department of Obstetrics and Gynecology People's Hospital of Zhengzhou University Henan Provincial People's Hospital Zhengzhou Henan450003 China Key Laboratory of Advanced Display and System Application Shanghai University Shanghai200072 China

Three-dimensional (3D) porous materials have been widely used in flexible electronic sensing, biological scaffolds, and other applications. There are still challenges in fabricating porous hydrogel with micro-nano porous structures. Herein, we demonstrate a 3D microfluidic bubble freeze printing method for fabricating porous piezoelectric hydrogel. By integrating three-dimensional microfluidic technology into the 3D printing nozzle, a 3D microfluidic freeze printing (3MFP) platform with an integrated 3D microfluidic chip was innovatively developed. Microbubbles generated in the 3D microfluidic chip can be controlled by adjusting the flow rate parameter. The as-prepared PVA/PVDF foam of microbubbles was used as a template for printing the PVA/PVDF-based porous piezoelectric hydrogel with micro-nano porous structures. The 3MFP platform allows for fabricating PVA/PVDF-based porous piezoelectric hydrogels with varying porosity and shapes. This method enables the flexible and controllable printing of porous hydrogel in one-dimensional to three-dimensional patterns. The PVA/PVDF-based porous piezoelectric hydrogel exhibits excellent piezoelectric sensing properties and good controllability, indicating significant potential for use in flexible wearables and intelligent sensing applications. © 2025 The Society of Manufacturing Engineers

关键词： Microfluidic chips

来源：评论

学校读者我要写书评

暂无评论

Improving Sensing Performance of Plate-Type Fiber-Optic Accelerometers Using Noncircular Fiber-Optic Coils

引用

IEEE Sensors Journal 2025年第9期25卷 15080-15091页

作者： Lu, Tan Wang, Shun Wen, Kunhua Yang, Jun Mo, Haohao Jiang, Ruiyao Ping, Xinyang An, Ran Wang, Yuncai Qin, Yuwen Guangdong University of Technology School of Physics and Optoelectronic Engineering Key Laboratory of Photonic Technology for Integrated Sensing and Communication Ministry of Education of China Guangdong Provincial Key Laboratory of Information Photonics Technology Guangdong Provincial Key Laboratory of Sensing Physics and System Integration Applications Guangzhou510006 China Guangdong University of Technology Institute of Advanced Photonic Technology School of Information Engineering Key Laboratory of Photonic Technology for Integrated Sensing and Communication Ministry of Education of China Guangdong Provincial Key Laboratory of Information Photonics Technology Guangzhou510006 China Harbin Engineering University Key Laboratory of In-Fiber Integrated Optics Ministry of Education of China College of Physics and Optoelectronic Engineering Harbin150001 China

The commonly used mandrel-type or disk-type fiber-optic accelerometers (DT-FOAs) are inherently limited in their capacity to detect low-frequency signals due to their structural characteristics. The fiber-optic coil (FOC), as the core sensing component of an interferometric FOA, plays a crucial role in determining the sensor’s sensitivity through its strain distribution characteristics on the transducer plate. This article presents, for the first time, the novel introduction of noncircular FOCs (NC-FOCs), which are employed in the design of a rectangular thin-plate FOA and plate-tpye FOA (PT-FOA) to improve low-frequency detection performance. In this study, the finite element method (FEM) and tensor analysis theory are employed to establish a universal model for PT-FOA constructed with NC-FOCs. Sensors with FOCs of various shapes were designed, fabricated, and tested. Both theoretical and experimental results demonstrate that different shapes of FOCs can improve sensitivity by approximately 14.62%. The underlying mechanisms of these improvements are analyzed by studying the strain tensor distribution on the transducer plate. The proposed PT-FOA addresses the limitations of existing FOAs in low-frequency detection. The sensitivity enhancement method maintains the same resonant frequency and thermal noise levels while significantly improving the signal-to-noise ratio (SNR) and sensitivity of the sensor. This work provides a general modeling approach and valuable practical guidance for the design and optimization of high-sensitivity FOAs, with important implications for both research and application. © 2001-2012 IEEE.

关键词： Signal to noise ratio

来源：评论

学校读者我要写书评

暂无评论

Evaluation of chromatic uniformity in mini-LED displays based on a gray-level co-occurrence matrix and the discrete Fourier transform

引用

Optics Express 2025年第8期33卷 16938-16951页

作者： Chen, Fangqi Lin, Kechuang Li, Yakai Li, Panpan Li, Jinchai Huang, Kai Kang, Junyong Zhang, Rong Engineering Research Center of Micro-Nano Optoelectronic Materials and Devices Ministry of Education Fujian Key Laboratory of Semiconductor Materials and Applications Department of Physics Xiamen University Fujian Xiamen361005 China San’an Optoelectronics Co. Ltd. Fujian Xiamen361005 China Future Display Institute of Xiamen Fujian Xiamen361005 China Key Laboratory of Advanced Photonic and Electronic Materials School of Electronic Science and Engineering Nanjing University Jiangsu Nanjing210093 China

In the production of mini-light-emitting diodes (LEDs), chromatic discrepancies among chips have become a significant factor affecting display quality. The hybrid chip sorting method is commonly employed in mini-LED production to achieve efficient demura, but a comprehensive evaluation system is lacking. This study evaluates the chromatic uniformity of mini-LED arrays using a gray-level co-occurrence matrix (GLCM) and the discrete Fourier transform (DFT). A scientific evaluation system was established to assess the chromatic uniformity of displays. Data from 270 wafers were collected to construct a comprehensive mini-LED arrays database. Experimental results demonstrate that this evaluation system accurately assesses texture information within images, revealing chromatic differences in local details as well as overall uniformity and periodic variations. These analytical methods are expected to effectively support the optimization of binning processes, enhance demura efficiency, and provide a scientific basis for process improvement and quality control. © 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： Discrete Fourier transforms

来源：评论

学校读者我要写书评

暂无评论

High-Performance Spiro Bifluoren-Based Charge Generation Layer for the Efficient and Thermal-Stability Organic Light-Emitting Diodes

SSRN

引用

SSRN 2025年

作者： Xu, Yachen Zhou, Qi Li, Chunya Wu, Ranghui Shi, Wei Lin, Yang Lan, Weixia Wei, Bin School of Mechatronic Engineering and Automation Shanghai University Shanghai200444 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

We have designed and synthesized 2-(9,9'-spirobi[fluoren]-2-yl)-1,10-phenanthroline (SBFPA) and investigated its optoelectrical and thermal characteristics to apply it as a charge generation layer (CGL). The SBFPA-engaged CGL in tandem organic light-emitting diodes (OLEDs) could efficiently generate and balance the injection of carriers. The current efficiency of the tandem red phosphorous OLED reached 31.2 cd/A at a luminance of 10,000 cd/m², which is 2.7 times that of the single OLED (11.6 cd/A). The decomposition temperature of SBFPA was as high as 342 ℃, which guaranteed the thermal stability of the tandem OLED. Moreover, the T95 lifetime (time to 95% of the initial luminance) of the tandem OLED reached 229 h. The charge generation ability of CGL was confirmed through a p-i-n-CGL-structured OLED, where CGL was inserted between the electron injection layer and the cathode to work as the source of electron generation. The maximum power efficiency of the OLED increased 30.9% to 10.46 lm/W, and the maximum luminescence enhanced 41.5% to 23925 cd/m2 compared to the OLED without CGL. The results highlight the promising application of the developed CGL in tandem OLED, offering new possibilities for development of reliable electronics. © 2025, The Authors. All rights reserved.

关键词： Organic light emitting diodes (OLED)

来源：评论

学校读者我要写书评

暂无评论

Efficient and Stable Perovskite Light-Emitting Diodes Enabled by Oriented Growth Regulation

IEEE Electron Device Letters

引用

IEEE Electron Device Letters 2025年

作者： Zhang, Kun Zhang, Xiaofei Zhang, Chengxi Feng, Jie Kong, Lingmei Wang, Sheng Yang, Yingguo Wang, Lin Yang, Xuyong Shanghai University Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai200072 China Jiangsu University of Science and Technology School of Science Zhenjiang212100 China Zhangjiang Lab Shanghai Advanced Research Institute Shanghai China Fudan University School of Microelectronics Shanghai China

Metal halide perovskites have demonstrated remarkable progress in optoelectronic applications, including solar cells and light-emitting diodes (LEDs). However, the long-term stability of perovskite LEDs (PeLEDs) remains a critical challenge, impeding their practical applications and commercialization. Herein, we regulate the growth kinetics of perovskites in liquid-solid stages by introducing 2,3,4,5, 6-pentafluorophenylphosphonic acid (PFBPA) into the precursor solution. The PFBPA molecules will create a protective passivation layer by coordinating with uncoordinated lead (Pb2+) on the perovskite surface, which regulates the growth of perovskite crystals during the liquid-solid stages and results in the formation of uniform perovskite films with reduced grain size. Moreover, the coordination of PFBPA with Pb2+ also improves the moisture resistance of perovskites, favoring the operational stability of devices. The resulting PeLED devices achieved a maximum brightness of 12426 cd m-2, a peak external quantum efficiency (EQE) of 22.6%, and a remarkable operational stability with a half-lifetime exceeding 1187 hours at initial luminance of 100 cd m-2. © 1980-2012 IEEE.

关键词： Perovskite

来源：评论

学校读者我要写书评

暂无评论

Exploring multifrequency bound states in the continuum in square-root topological circuits

引用

Physical Review B 2025年第4期111卷 045152-045152页

作者： Li Luo Quanquan Shi Ming Zhang Xiaochan Wang Yingyi Huang Jiebin Peng School of Physics and Optoelectronic Engineering & Guangdong Provincial Key Laboratory of Sensing Physics and System Integration Applications & Interdisciplinary Innovation Institute of Frontier Physics and Advanced Scientific Instruments Guangdong University of Technology Guangzhou 510006 China

Bound states in the continuum (BICs) have attracted significant attention due to their intriguing properties. The introduction of square-root topology often leads to multifrequency topological bound states, enhancing the richness of the system behavior. In this study, we construct a square-root topological circuit hosting topological bound states in multi-frequency gaps based on connected double Su-Schrieffer-Heeger chains. By simple adjustments, the double chains can be decoupled, transitioning into square-root topological bound states in the continuum circuit (STBICs). Experimental validations are conducted to confirm the coexistence of both topological and trivial bound states in these systems. Furthermore, we demonstrate robustness against perturbations, providing strong evidence supporting the topological protection of BICs. Our research bridges the gap between square-root topology and BICs, resulting in rich topological properties and offering insight into the potential applications of square-root topological BICs circuits.

关键词： Electric network topology

来源：评论

学校读者我要写书评

暂无评论

High-Density Sensor Array Based on a-IGZO TFT for Pressure and Light Response

引用

IEEE Transactions on Electron Devices 2025年

作者： Zhang, Jianhua Zhou, Jixing Xue, Longwei Dai, Junshuai Zhang, Xudong Liu, Hai Chen, Longlong Zhao, Tingting Shanghai University Key Laboratory of Advance Display and System Applications Ministry of Education Shanghai200072 China Shanghai University Shanghai Collaborative Innovation Center of Intelligent Sensing Chip Technology School of Microelectronics Shanghai201800 China

Detection capabilities similar to those of eyeballs and skin, such as pressure and light sensing, are crucial for electronic skins, bionic eyeballs, human–machine interactions, and biomimetic robots. Previous studies have primarily focused on investigating individual physical quantities, while simultaneously mapping these quantities remains challenging. This article introduces a dual-parameter sensor array based on amorphous indium gallium zinc oxide (a-IGZO) thin-film transistors (TFTs). The array is capable of simultaneously and independently detecting pressure (106.9 kPa-1, ranging from 0.5 to 10 kPa) and ultraviolet (UV) light (0.5 (μW/cm2)-1, ranging from 0 to 76 μW2). The pressure detection is achieved through a patterned conductive film connected to the source electrode of the TFTs, while the UV light is detected by photogenerated electron-hole pairs in the a-IGZO channel. Integration of TFTs increase the spatial resolution of both the pressure and light sensor array to 128 pixels per square centimeter (PPSC). The development of this dual-parameter high-density sensor array holds profound significance for applications in biomimetic eyeballs and electronic skin, such as texture and shape recognition. © 1963-2012 IEEE.

关键词： Zinc oxide

来源：评论

学校读者我要写书评

暂无评论

Dependence of charge trapping of fluorescent and phosphorescent dopants in organic light-emitting diodes on the dye species and current density

引用

Chinese Physics B 2010年第3期19卷 450-455页

作者：魏斌廖英杰刘纪忠路林曹进王军张建华 Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University

This paper utilizes multilayer organic light-emitting diodes with a thin layer of dye molecules to study the mech- anism of charge trapping under different electric regimes. It demonstrates that the carrier trapping was independent of the current density in devices using fluorescent material as the emitting molecule while this process was exactly opposite when phosphorescent material was used. The triplet-triplet annihilation and dissociation of excitons into free charge carriers was considered to contribute to the decrease in phosphorescent emission under high electric fields. Moreover, the fluorescent dye molecule with a lower energy gap and ionized potential than the host emitter was observed to facilitate the carrier trapping mechanism, and it would produce photon emission.

关键词： organic light-emitting diodes excitation mechanism charge trapping current density

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：