共查询到20条相似文献,搜索用时 137 毫秒
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将无机薄膜电致发光器件和有机薄膜电致发光器件作了一个比较,并给出了有机薄膜我器件的基本结构及其功能层材料选择的依据。最后分析了一个实际制备的双层器件。 相似文献
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分析Al/PTFE活性破片高速碰撞双层间隔铝靶作用过程,在AUTODYN-2D平台上采用光滑粒子流体动力(SPH)算法,对Al/PTFE活性破片撞击双层间隔Al靶板的过程进行了数值模拟,得到了双层靶板间距对后靶孔径及着靶速度的影响规律。在相同靶板厚度下,靶板间距为120 mm时,活性弹丸贯穿后靶板的孔径最大;80~120 mm孔径逐渐增大,120~160 mm孔径逐渐减小。弹丸前部分的着靶速度随着靶板间距的增加而减少,而后部分的剩余速度先递减,120 mm的靶板间距达到最小,随后递增。利用一级轻气炮加载Al/PTFE破片作用双层铝靶进行实验,验证数值模拟方法的有效性,活性破片的碎裂是由弹丸撞击产生的冲击波和稀疏波相互作用诱发产生,碎片云的爆燃反应增强了对后靶板的毁伤,使得活性破片对后靶板的毁伤效应增强。 相似文献
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pin器件在整流和探测领域都有着重要的潜在应用价值。为了提高器件伏安和光电探测性能,提出了一种新型的p-硅/i-氧化铝/n-掺铝氧化锌(AZO)结构器件,并利用原子层沉积技术(ALD)在低温下实现了器件制备。分析了器件的伏安特性,结果显示相比传统的pn结构器件,新结构在无光条件下实现了152的整流比。通过增加i层的沉积厚度,可以有效抑制遂穿效应,减小暗电流,提高光电检测的灵敏度,实现了比传统材料更高的光生电流灵敏度。 相似文献
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Ni/Al复合涂层由30层平均厚度为900nm的Ni和200nm的Al层交替组合而成,涂层总厚度约为15μm.试验结果表明,由于复合涂层能在Ni层和Al层之间形成一亚稳相(Al9Ni2)过滤层,使涂层的强度、硬度有了较大幅度的提高. 相似文献
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SiCp/Al是具有优良物理、机械性能的难加工多相材料。为解决加工SiCp/Al材料时刀具磨损快、表面质量差的问题,通过对SiCp/Al切削表面形成机理及刀具磨(破)损机理的分析,采用常规硬质合金刀具材料设计了加工SiCp/Al的新型引导光整刀具,并用传统工艺设备进行了切削试验。结果表明,新型刀具可显著提高刀具耐用度和加工表面质量。 相似文献
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Indium tin oxide (ITO) has been commonly used as an anode of organic light emitting diode (OLED), because of relatively high work function, high transmittance, and low resistance. However, interface property between ITO and adjacent organic layer limits hole injection from the anode electrode. We have synthesized 4'-nitrobiphenyl-4-carboxylic acid (NBCA) and fabricated the hole-only device consisting of ITO/NBCA self-assembled monolayer (SAM)/TPD (1500A)/Al (500A) and the organic light emitting diode (OLED) consisting of ITO/NBCA SAM/TPD (600A)/Alq(3) (600A)/Al (600A). The prepared hole-only device with NBCA exhibited lower driving voltage than the device using 4-nitrobenzoic acid (NBA). OLED using NBCA also showed high external quantum efficiency. 相似文献
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《Tribology - Materials, Surfaces & Interfaces》2013,7(1):19-25
The linear stability analysis of double porous and surface porous layer journal bearing based on long and short bearing approximations is presented. The Brinkman model is employed in the porous region and the infinite permeability porous layer is simulated as surface layer. The coefficients of load, threshold speed and critical whirl frequency ratio are computed for double porous and surface porous layer configurations. The coefficients obtained using long and short bearing approximations yield same results. Higher threshold speed is obtained for double layer configurations of (i) high permeability bearing adsorbent porous layer topped with low permeability porous layer, and (ii) surface porous layer lubricant film. 相似文献
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针对洪涝灾害问题,开展雨量自动检测系统设计,避免洪水对人们造成生命财产的损失.以STM32F103 型低功耗单片机为核心,利用 FC-37 雨滴传感器、 NRF24L01 无线收发模块以及 OLED 显示屏等实现雨量无线检测.该系统分为主机和从机 2 个控制部分,从机主要包括雨量检测模块和 OLED 显示模块,通过无线模块将采集到的数据发送到主机;主机一方面检测自身环境下的雨量信息,另一方面由无线模块接收从机雨量信息并发送给 OLED 显示屏显示出来.结合电路原理图进行硬件设计,测试结果表明,该设计实现了主机和从机对雨量的实时检测功能. 相似文献
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This paper presents a theoretical research concerning the effects of the asymmetrical electric double layers on thin film lubrication. A mathematical model of electro-viscosity considering the asymmetrical electric double layers is developed, which acts as an extensional study of the symmetrical cases. Then, the numerical analyses based on this model are performed to evaluate the influence of electric double layers on the thin water lubricating film with and without consideration of the elastic deformation of the opposing surfaces. The results show that the electric double layers lead to significant variations in the properties both of hydrodynamic and elasto-hydrodynamic lubricating film. 相似文献
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Schmidt M Eng PJ Stubbs JE Fenter P Soderholm L 《The Review of scientific instruments》2011,82(7):075105
We present a novel design of a purpose-built, portable sample cell for in situ x-ray scattering experiments of radioactive or atmosphere sensitive samples. The cell has a modular design that includes two independent layers of containment that are used simultaneously to isolate the sensitive samples. Both layers of containment can be flushed with an inert gas, thus serving a double purpose as containment of radiological material (either as a solid sample or as a liquid phase) and in separating reactive samples from the ambient atmosphere. A remote controlled solution flow system is integrated into the containment system that allows sorption experiments to be performed on the diffractometer. The cell's design is discussed in detail and we demonstrate the cell's performance by presenting first results of crystal truncation rod measurements. The results were obtained from muscovite mica single crystals reacted with 1 mM solutions of Th(IV) with 0.1 M NaCl background electrolyte. Data were obtained in specular as well as off-specular geometry. 相似文献
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采用离子束溅射在不同的工艺参数下制备一系列单层 Mo膜、Si膜及多层膜 ,并用原子力显微镜分析单层膜表面粗糙度及两种材料间的界面扩散。当束流电压超过一定数值时 ,可避免单层膜的柱状生长 ;在 Mo- on- Si和 Si- on- Mo界面中 ,Mo- on- Si界面扩散对反射率的影响更大。采用 X射线衍射仪分析多层膜中 Mo、Si材料的晶体结构 ,均为多晶结构 ,其中 Mo为 ( 1 1 0 )晶向 ,Si为 ( 4 0 0 )晶向。根据上述分析优化工艺参数 ,获得的 1 3nm Mo/Si多层膜反射率达到 60 %。 相似文献
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Eungki Lee 《The International Journal of Advanced Manufacturing Technology》2009,44(3-4):360-371
Trends in display sizes have hauled the enlargement of mother glass substrates. The enlargement of substrates requires the improvement of the evaporation system design for organic light-emitting device (OLED) fabrication process. Some difficulties may arise regarding the deflection of a large glass substrate during its aligning operation of the vacuum evaporation process due to its thinness. In the case of the 3G OLED glass substrate, the deflection is 1~3 mm. But for the 4G OLED, the deflection of the glass is 34 mm under clamping-end boundary condition. Therefore, it is difficult to align the keys and the marks in the 4G glass substrate. To address the glass-deflection problem during the aligning operation, a new glass handling method is proposed in this study. The glass deflection can be largely improved by applying the boundary conditions of the glass substrate. The aim of this study is to simulate a glass substrate and to propose a new design concept for the glass handler of the evaporation system for improving the aligning accuracy. Experiments were conducted to verify the effectiveness of the proposed method for minimizing glass deflection. This new design of a glass substrate handler may be useful in manufacturing large OLED displays. 相似文献