倒圆角三角型两轴柔性支撑设计

为提高压电陶瓷驱动的快速反射镜的回转精度,对倒圆角三角型柔性支撑进行研究。首先利用卡氏第二定理推导出倒圆角三角型柔性铰链柔度和回转精度理论计算公式;然后建立倒圆角三角型柔性铰链和两轴柔性支撑的有限元模型,并进行仿真分析得出柔度和回转精度的仿真值。将仿真值与理论值进行比较,其结果表明,最大误差在8%以内,验证了所推导公式的准确性。对比直圆型柔性支撑,在保证柔度的前提下,倒圆角三角型柔性支撑的回转精度提高了40%,具有重要的工程实用价值。     

有机发光显示的几项新技术

有机发光显示(OLED)作为下一代显示器倍受关注。本文简要介绍OLED显示器的几项新技术和制作方法，以及其研究现状和今后的发展趋势。     

ITO/Ag/AgNW新型复合透明导电薄膜性能研究

采用磁控溅射和湿法涂布技术制备了一种ITO/Ag/AgNW结构的新型复合透明导电薄膜。研究其光学、电学等性能发现:ITO/Ag/AgNW薄膜在400~700nm的平均透过率高于ITO/Ag/ITO薄膜,且方块电阻远小于ITO/Ag/ITO薄膜,达到6.9Ω/□;耐弯折性能测试后,其方块电阻约增加62%,达11.2Ω/□。研究结果表明,这种新型的复合透明导电薄膜具有低阻、高透及耐弯折良好的特性,在柔性显示领域具有一定的应用潜力。     

Moist-Electric Generator with Efficient Output and Scalable Integration Based on Carbonized Polymer Dot and Liquid Metal Active Electrode

Moisture-enabled electricity generation (MEG) is highly promising in next-generation energy conversion. However, the practical applications of existing MEG devices are limited due to their low current and voltage outputs, strong dependence on high moisture, and inflexible nature. Herein, an efficient MEG integrated with flexible, all-weather, and scalable fabrication characteristics based on the rational combination of carbonized polymer dots (CPDs) and liquid metal (LM) active electrodes is developed for the first time. Remarkably, the fabricated MEG device can produce a stable voltage output of 800 mV and a record high current density of 1640 µA cm⁻². Even at a low air humidity of 15%, the MEG device can provide a high voltage output of 0.65 V and a considerable current density of 12 µA cm⁻². The prompted diffusion of hydrogen ions in CPDs and the additional metal ions ionized from the LM electrode contribute synergistically to the high electricity generation. Additionally, the device can be easily integrated on various flexible substrates and generate an ultrahigh voltage of 210 V to power commercial electronics, showing great potential in large-scale fabrication and application.     

Intrinsically Flexible and Aging Resistant Fluorene-Based Rod-Coil Copolymer for Bendable Deep-Blue PLEDs

In the field of flexible light-emitting display, goal-oriented intelligent molecular design is used to control various behaviors of molecules, which provides potential for the development of flexible light-emitting conjugated polymers (LCPs). The introduction of non-conjugated units into polymer molecules is a key prerequisite for realizing the intrinsic flexibility, but its easy interchain slip will also lead to the formation of interchain excited states, which is detrimental to the efficiency of light-emitting diodes. Herein, two kinds of fluorene-based rod-coil copolymer with stable deep blue emission characteristics is presented and with Commission Internationale de L'Eclairage (CIE) coordinates of (0.18, 0.14) and (0.15, 0.09), respectively. Surprisingly, the copolymer films show efficient blue emission even at 100% tension. Meanwhile, the rod-coil copolymer possesses better aging resistance compared to rigid π-conjugated counterparts. Finally, both rigid and flexible light-emitting diodes based on rod-coil copolymer exhibit stable deep blue emission, and the G2-based PLED with CIE coordinates of (0.16, 0.08), which approach National Television System Committee standard blue specification. These results confirm the validity of rod-coil copolymer design strategy in constructing inherently flexible polymers with deep blue emission, which have great application potential in flexible PLEDs.     

Flexible,Conformal Organic Synaptic Transistors on Elastomer for Biomedical Applications

Bioelectronics in synaptic transistors for future biomedical applications, such as implanted treatments and human–machine interfaces, must be flexible with good mechanical compatibility with biological tissues. The rigid nature and high deposition temperature in conventional inorganic synaptic transistors restrict the development of flexible, conformal synaptic devices. Here, the dinaphtho[2,3‐b:2′,3′‐f]thieno[3,2‐b]‐thiophene organic synaptic transistor on elastic polydimethylsiloxane is demonstrated to avoid these limitations. The unique advantages of organic materials in low Young's modulus and low temperature process enable seamless adherence of organic synaptic transistors on arbitrary‐shaped objects. On 3D curved surfaces, the essential synaptic functions, such as potentiation/depression, short/long‐term synaptic plasticity, and spike voltage–dependent plasticity, are successfully realized. The time‐dependent surface potential characterization reveals the slow polarization of dipoles in the dielectric is responsible for hysteresis and synaptic behaviors. This work represents that organic materials offer a potential platform to realize the flexible, conformal synaptic transistors for the development of wearable and implantable artificial neuromorphic systems.     

硅微纳结构及其在新型太阳电池中的应用

综述了近年来各种硅微纳结构的特征和制备技术,介绍了其在新型太阳电池中的应用现状与前景.首先,阐述了硅微纳结构在传统p-n结、新型径向p-n结以及异质结太阳电池结构设计中的研究进展;其次,从光吸收增强、表面修饰及钝化的角度,分析了硅微纳结构太阳电池的增效措施;最后,提出了柔性硅微纳结构太阳电池开发的新思路.     

Ultrathin Flexible Graphene Film: An Excellent Thermal Conducting Material with Efficient EMI Shielding

As the portable device hardware has been increasing at a noticeable rate, ultrathin thermal conducting materials (TCMs) with the combination of high thermal conductivity and excellent electromagnetic interface (EMI) shielding performance, which are used to efficiently dissipate heat and minimize EMI problems generated from electronic components (such as high speed processors), are urgently needed. In this work, graphene oxide (GO) films are fabricated by direct evaporation of GO suspension under mild heating, and ultrathin graphite‐like graphene films are produced by graphitizing GO films. Further investigation demonstrates that the resulting graphene film with only ≈8.4 μm in thickness not only possesses excellent EMI shielding effectiveness of ≈20 dB and high in‐plane thermal conductivity of ≈1100 W m^‐1 K^‐1, but also shows excellent mechanical flexibility and structure integrity during bending, indicating that the graphitization of GO film could be considered as a new alternative way to produce excellent TCMs with efficient EMI shielding.     

DCC-plus技术及其产品灵活性

中国石化石油化工科学研究院开发的增强型催化裂解(DCC-plus)技术采用多反应区组合反应器型式,不仅能够实现不同反应区的分区精准控制,而且耦合了C₄馏分和轻汽油馏分循环裂化技术,强化了重质原料油的一次裂化反应和汽油馏分的二次裂化反应,在大幅度提高丙烯产率的同时可以降低干气和焦炭产率。DCC-plus技术已经在多个炼油厂得到了工业应用,其中大榭石化的2.2 Mt/a DCC-plus装置的乙烯和丙烯产率分别可以达到5.16%和21.55%。DCC-plus技术具有很好的产品灵活性,通过工艺操作参数和催化剂配方的调整,可以实现不同目标产品的灵活切换,为我国炼油行业的转型升级提供了一条可靠的途径。     

滑翔增程弹鸭式舵的气动设计与分析

为了保证滑翔增程弹箭在滑翔飞行过程中有效地增程,必须对滑翔弹箭的舵面进行气动设计与分析.阐述了制导炮弹舵面参数确定的原则,研究了滑翔增程弹舵面几何参数的选择、舵面尺寸确定的方法.仿真结果表明,采用该方法确定的舵面气动性能能够保证滑翔增程弹在滑控段飞行过程中稳定性适当,静稳定性储备量约在4%左右;操纵性较好,舵面偏转10°,能够产生约6°的平衡攻角;稳定性与操纵性、舵偏角和平衡攻角匹配较好,为滑翔增程弹舵面的气动设计提供了参考.