A novel TFT‐OLED integration for OLED‐independent pixel programming in amorphous‐Si AMOLED pixels

Abstract— The direct voltage programming of active‐matrix organic light‐emitting‐diode (AMOLED) pixels with n‐channel amorphous‐Si (a‐Si) TFTs requires a contact between the driving TFT and the OLED cathode. Current processing constraints only permit connecting the driving TFT to the OLED anode. Here, a new “inverted” integration technique which makes the direct programming possible by connecting the driver n‐channel a‐Si TFT to the OLED cathode is demonstrated. As a result, the pixel drive current increases by an order of magnitude for the same data voltages and the pixel data voltage for turn‐on drops by several volts. In addition, the pixel drive current becomes independent of the OLED characteristics so that OLED aging does not affect the pixel current. Furthermore, the new integration technique is modified to allow substrate rotation during OLED evaporation to improve the pixel yield and uniformity. The new integration technique is important for realizing active‐matrix OLED displays with a‐Si technology and conventional bottom‐anode OLEDs.     

Medical displays by using plasma‐beam‐alignment technology

Abstract— Novel anode layer plasma within minimum chamber space was developed for non‐contact alignment process. The plasma‐treated polyimide (PI) surface showed no particle contamination and no micro‐scratches. Surface morphology was investigated by using scanning electron microscope (SEM), an atomic force microscope (AFM), and X‐ray photoemission spectroscopy. The different oxygen‐to‐carbon ratio ([O]/[C] ratio) for XPS spectra indicated a composition change after plasma treatment. Surface pretilt angles were varied from 0 to 2.1° under different plasma exposure times. Finally, a prototype 20.8‐in. QXGA IPS‐mode gray‐scale medical liquid‐crystal display was successfully demonstrated with high contrast ratio, excellent uniformity, and wide viewing angle using this new plasma‐beam‐alignment technique.     

锂离子电池负极材料 Na2Li2Ti6O14的嵌脱锂过程动力学研究

为了研究钛酸钠锂(Na2Li2Ti6O14)负极材料嵌脱锂的动力学行为,用溶胶-凝胶法合成 Na2Li2Ti6O14负极材料,采用 X 射线衍射法(XRD)和电子显微镜(SEM)分别对材料进行物相分析和微观形貌的观察.采用恒流充放电测试、循环伏安法(CV)和恒电流间歇滴定法(GITT)研究了 Na2Li2Ti6O14的电化学性能和嵌脱锂过程动力学.研究结果表明,制备的 Na2Li2Ti6O14材料纯度高,结晶度良好,循环稳定性好;由不同扫描速率的循环伏安法测出的 Na2Li2Ti6O14中锂离子在氧化、还原峰对应的化学扩散系数 Da和 Dc分别为7.3×10-11和7.8×10-11cm2/s;由恒电流间歇滴定技术测得的锂离子在 Na2Li2Ti6O14电极中的扩散系数为10-11~10-8cm2/s.     

锂离子电池用高容量合金类硅基负极材料研究进展

锡、硅负极材料由于具有高的比容量等优点,成为提高锂离子电池能量密度的首选负极材料。首先介绍了目前产业界开发锡、硅负极材料的进展,并从商业化的角度比较了这两类材料在开发工艺及实际使用电性能方面的区别。进一步从基础研发角度重点阐述了不同结构的硅基材料(单质硅、硅氧化物、硅碳复合物及硅合金)的电性能改性研究进展,指出了具有工业化前景的工艺方法。     

Influence of zinc on electrochemical discharge activity of Mg-6%Al-5%Pb anode

Mg-6%Al-5%Pb (mass fraction) anodes with different contents of zinc were prepared by melting and casting. The electrochemical discharge behavior of these anodes in 3.5% NaCl solutions was investigated by galvanostatic test and electrochemical impedance spectroscopy (EIS). The microstructures and the corroded surfaces of these anodes were studied by scanning electron microscopy (SEM) and emission spectrum analysis (ESA). The phase structures and the corrosion products of the anodes were analyzed by X-ray diffraction (XRD). The results show that zinc promotes the grain refinement of Mg-6%Al-5%Pb anode and makes the average discharge potential of Mg-6%Al-5%Pb anode more negative during galvanostatic test. Mg-6%Al-5%Pb anode with the addition of 1% (mass fraction) zinc has the best electrochemical performance. The activation mechanism of zinc to Mg-6%Al-5%Pb anode is as follows: The hydrolyzation of dissolved Zn²⁺ ions reduces the pH value of the solution near the surface of the anode and accelerates the dissolution of Mg(OH)₂ film; The precipitated Zn(OH)₂ with similar structure as Mg(OH)₂ combines with Mg(OH)₂ film easily and makes it break down.     

Enhanced electrochemical properties of SnO2 anode by AlPO4 coating

A SnO₂ anode material undergoes severe capacity loss, which is mainly associated with cracking/crumbling of the material by the large volume change between the Li_xSn and Sn phases, and the intensive reactions with the electrolyte solution. However, AlPO₄ nanoparticle coating showed drastically improved electrochemical properties with decreased surface cracks. The AlPO₄-coated SnO₂ exhibited a capacity of 781 mAh/g, approaching its theoretical capacity at the first cycle, with 44% capacity retention after 15 cycles between 2.5 and 0 V at a relatively high C rate of 105 mA/g. In contrast, the bare SnO₂ showed an initial capacity of 680 mAh/g, with only 8% capacity retention after 15 cycles.     

大气压直流双阳极等离子弧脉动特性研究

等离子弧的脉动特性是表征等离子体物理状态和过程的重要参数之一,等离子体射流的非稳定性和阳极斑点在电极上的运动是引起等离子弧脉动的主要原因,是等离子体技术的实际应用和进一步发展的关键。该文介绍了一种大气压直流双阳极等离子发生器,通过对等离子弧电信号进行时域和频域分析,研究了载气成分、载气流量和弧电流等参数的变化对等离子弧脉动特性的影响,结果表明在文中的实验条件下等离子弧的伏安特性呈上升趋势,纯氩气作为载气时等离子弧的脉动特性主要和电源的交流分量有关,氩氮混合气体作为载气时等离子弧的脉动特性除了和电源的交流分量有关,还和弧室内存在的赫姆霍茨共振有关,其共振频率独立于气体流量和弧电流的变化。     

混凝电解气浮-吸附过滤处理洗染废水

采用混凝电解气浮-吸附过滤法处理洗染废水.试验结果表明:混凝电解气浮过程中,采用石墨作阴极,铁作阳极,电解电压一般控制在8~11 V,电能消耗约0.08 kW h/m3,CODC r可去除30%以上;吸附过滤过程选用新鲜粉煤灰作为吸附材料,粒度为0.3 mm,废水在吸附柱中的停留时间为2 h,CODC r可以去除50%以上.     

电解铝生产中优化磷生铁配方的试验研究

针对240kA铝电解槽阳极组的钢爪和碳块之间浇注压降高低不等，造成生产中设备附加电阻大，浪费电能的状况，通过设计正交试验，优化磷生铁配方，降低了浇注压降，节能效果显著。     

锌电积节能措施的研究现状

传统的湿法炼锌过程中，存在着电积能耗大的问题。本文系统综合了当前锌电积的节电措施，并对新型情性阳极材料及锌电积新工艺的研究现状进行了详细阐述。