Institutional Repository of Ningbo Institute of Material Technology & Engineering, CAS
Not a member yet
14529 research outputs found
Sort by
Enhanced thermoelectric performance of p-type sintered BiSbTe-based composites with AgSbTe2 addition
No full textBismuth telluride-based materials have been widely used in the field of thermoelectric cooling near room temperature. However, the material utilization and device conversion efficiency were limited by the low ther-moelectric performance and poor mechanical properties of commercial zone-melting materials. With an aim to optimize the comprehensive properties, we prepared the composite samples of Bi0.48Sb1.52Te3 (BST)-x wt% AgSbTe2 (x = 0, 0.05, 0.1, 0.2) via the hot pressing method. It was found that the AgSbTe2 addition can effectively increase the carrier concentration and improve the power factor to 46 mu W cm(-1) K-2 at 300 K. Due to the introduction of dislocations, stress and Te inhomogeneities, the lattice thermal conductivity of the composite was significantly reduced to 0.69 W m(-1) K-1 at 325 K. As a result, a maximum ZT of 1.15 at 325 K is obtained for the x = 0.1 sample. Interestingly, BST-0.1 wt% AgSbTe2 exhibits roughly isotropic thermoelectric performance perpendicular to and parallel to the pressing direction. Our study suggests that the BST-AgSbTe2 composite is very promising for the application of thermoelectric refrigeration near room temperature
Doping and Design of Flexible Transparent Electrodes for High-Performance Flexible Organic Solar Cells: Recent Advances and Perspectives
No full textSubstantial effort has been devoted to both chemical doping and design of flexible transparent electrodes (FTEs) for flexible organic solar cells (OSCs) in the past decade. Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate), graphene, metal nanostructures, metal oxide/ultrathin metal/metal oxide, Mxene, and their hybrid electrodes emerge to be the most promising flexible conducting materials over indium tin oxide. The FTE fabrications play a critical role in flexible OSCs. This feature review article summarizes the current status on the researches of the FTEs including various approaches and strategies to boost the conductivity, work function, mechanical flexibility, wettability, etc, which directly affect the performances of the flexible OSCs. The most cutting edge progresses on both FTEs and flexible OSCs are highlighted along the line. Advantages and plausible issues are pointed out. Perspectives are provided that can advance the developments of the flexible OSCs. This review raises the awareness for the importance of developing plenty of FTEs and reveals their critical role in flexible OSCs
LuAG∶Ce~(3+)在激光照明应用中的研究进展
No full text激光二极管(LDs)结合荧光转换材料实现白光被认为是下一代照明光源,其中的荧光转换材料对于整体光源的光度/色度参数、发光效率、长期工作稳定性至关重要。近年来,人们在LD照明中采用多种绿/黄/红荧光材料来丰富光谱成分,获得高质量的白光。其中,采用Lu_3Al_5O_(12)∶Ce~(3+)(LuAG∶Ce~(3+))绿色荧光材料作为主体成分,结合光谱展宽、红光补足等方案可将LD照明白光的显色指数大幅度提升。LuAG∶Ce~(3+)被认为是综合性能最优的绿色转换材料之一,在大功率LD的辐照下具有很高的热稳定性和饱和阈值。本文主要对基于LuAG∶Ce~(3+)的荧光晶体、荧光陶瓷、荧光玻璃、荧光薄膜等形态材料的制备方法及其在LD照明中的应用性能研究进行了总结,并且对其未来发展方向提出了展望
Micro-LED显示的发展现状与技术挑战
No full textMicro-LED技术被认为是消费电子领域下一个世代的显示技术。尽管市场上已经有很多公司推出了基于MicroLED显示技术的样机以及应用示范,然而Micro-LED显示技术远没有达到成熟的程度。本文从Micro-LED显示技术的历史、定义及技术挑战进行了综述,重点总结了Micro-LED在工程领域的技术挑战,最后对Micro-LED技术的未来发展方向进行了探讨。Micro-LED在芯片、巨量转移、全彩化等方面仍存在技术挑战,但其所展现出的高分辨、快响应、低能耗、长寿命等突出特点,能满足超小和超大显示的需求,如虚拟/增强显示和电子广告牌,展现出巨大的应用潜力,已经在学术界和工业界引起了广泛研究
酸性环境下用于溶剂脱水的沸石分子筛膜的研究进展
No full text综述了耐酸的亲水性沸石分子筛膜材料的最新研究进展,介绍了其在酸性环境下有机溶剂脱水工业上应用的研究现状,分析了进一步提高酸稳定性的设计方法,并对实现工业化大规模生产需要解决的关键问题进行了总结,展望了未来低成本绿色酸性溶剂脱水的发展趋势
Mini-LED背光技术在电视产品应用中的进展和挑战
No full textMini-LED是Micro-LED的先导技术,在液晶显示应用中被定义为"高阶直下式再升级"产品。最近各大终端消费电子品牌相继推出了基于Mini-LED背光的新产品,成为TV行业新的技术发展趋势。最近,Mini-LED背光技术迅速发展,与之相关的芯片、封装、面板以及整机等行业内的重要供应商相继入局,形成了推动Mini-LED背光技术发展的重要力量。本文从TV技术的角度出发,介绍了近期Mini-LED背光技术的研发进展,阐述了Mini-LED背光技术对推动消费电子领域产品技术革新的重要意义,在此基础上从技术和应用的角度探讨了Mini-LED背光技术当前面临的主要挑战,并对未来发展趋势进行了展望
海水电解析氧反应催化剂的研究进展
No full text综述了电解水析氧反应(OER)的催化机理;总结了海水电解阳极电极催化剂领域钛(Ti)作基底以及泡沫镍(Ni Foam)作基底的层状双氢氧化物(LDH)和其他非贵金属催化剂材料的最新研究进展;基于研究现状提出了电极材料优化策略,并对非贵金属在海水电解催化剂的研究方向进行了展望
飞秒脉冲激光空间光场调控的微透镜阵列制备技术进展
No full text作为最基本的微光学元件,微透镜在多个领域都有非常广泛的潜在应用,然而常见的面向透明硬脆材料微透镜的制备方法效率低下,且对作业环境的要求较高,极大地限制了透明硬脆材料微透镜阵列的大面积制备。空间光调制器作为一种对光场进行调制的设备,可以方便地实现多焦点或者结构化的光场,在光通讯、激光加工等领域具有重要的应用潜力。本文介绍了利用飞秒激光烧蚀结合湿法刻蚀制备硬脆材料微透镜阵列的基本方法,并系统地分析了影响所制备微透镜形貌的关键因素。通过在加工过程中对聚焦光斑的数量和位置进行精细调控,极大地提高了透明硬脆材料微透镜阵列的加工效率,且可以在加工过程中动态地调整飞秒激光烧蚀改性的形貌,从而实现不同尺寸微透镜阵列的高速制备,展现了空间光场调制技术在微光子集成芯片加工领域的应用前景
CuS/ZnS/ITO透明忆阻器的制备及其突触性能
No full text忆阻器突触可用于构建神经形态系统,进行类脑计算,而透明突触器件则有利于光电协同调控。本研究首次采用CuS薄膜作为电极,构筑了CuS/ZnS/ITO透明忆阻器,器件表现出稳定的忆阻性能与良好的均一性,在可见光范围内透过率高达82%。通过与Cu制电极的器件比较,采用CuS制电极可以抑制Cu离子向ZnS介质层中大量迁移,有利于提高器件稳定性。在此基础上,通过施加不同形式的电脉冲信号,可以调节忆阻器件的阻态,实现突触可塑性模拟。CuS/ZnS/ITO器件在未来透明神经形态器件领域具有重要的应用价值
阻燃玻璃纤维增强PA6的紫外光稳定性
No full text分别将三聚氰胺氰尿酸盐、十溴二苯乙烷、溴化聚苯乙烯和次磷酸盐作为阻燃剂对尼龙6 (PA6)进行阻燃玻璃纤维增强改性,采用热失重分析仪、水平垂直燃烧测定仪、分光测色仪对PA6复合材料的热降解行为、阻燃性能和紫外光老化后色差值(ΔE)进行了分析。结果表明,阻燃剂的引入提升了PA6复合材料的阻燃性能,但是降低了复合材料的热稳定性。阻燃剂类型对PA6复合材料紫外光黄变的影响程度依次是溴化聚苯乙烯>十溴二苯乙烷>三聚氰胺氰尿酸盐、次磷酸盐。通过将紫外光吸收剂和中性受阻胺光稳定剂复配使用可以有效抑制溴化聚苯乙烯阻燃增强PA6材料的紫外光黄变