Microstructure and optoelectronic properties of gallium- titanium-zinc oxide thin films deposited by magnetron sputtering

Gallium-titanium-zinc oxide(GTZO) transparent conducting oxide(TCO) thin films were deposited on glass substrates by radio frequency magnetron sputtering. The dependences of the microstructure and optoelectronic properties of GTZO thin films on Ar gas pressure were observed. The X-ray diffraction(XRD) and scanning electron microscopy(SEM) results show that all the deposited films are polycrystalline with a hexagonal structure and have a preferred orientation along the c-axis perpendicular to the substrate. With the increment of Ar gas pressure, the microstructure and optoelectronic properties of GTZO thin films will be changed. When Ar gas pressure is 0.4 Pa, the deposited films possess the best crystal quality and optoelectronic properties.     

化工过程远程无线监控的PCI Modem系统设计

介绍了一种可用于化工过程状态远程监测的无线传输系统，并讨论了本地PCI Modem系统的实现。该Modem改变了当前存在的Modem系统取电不方便，不易携带的缺点，地域适用性更广。本文主要分析了系统硬件设计和软件设计，包括器件选型，桥接芯片OX16PCI954配置，硬件构成原理，驱动安装软件开发和应用软件设计等。实际使用表明，该Modem系统适应性较强，性能良好，稳定实用。     

有机/聚合物异质结电致发光器件的光电性能

器件结构是影响有机发光器件(OLED)性能的重要因素之一.采用8-hydroxyquinoline-aluminum(AlQ)作为发光层(EML)和电子传输层(ETL),polyvinylcarbazole (PVK)作为空穴传输层(HTL),制备了具有有机小分子/聚合物异质结结构的OLED器件,通过其电压-电流-发光亮度(V-J-B)特性测试,研究了HTL的引入及其膜厚对器件性能的影响.实验结果表明,HTL的引入有效地改善了OLED的光电性能,同时HTL膜厚对器件性能具有显著影响,当HTL膜厚为20 nm时,所制备的OLED器件具有最小的驱动电压和启亮电压、最大的发光亮度和发光效率.

Abstract：

The device construction plays an important role in improving the optoelectronic performance of organic electroluminescence devices (OLEDs). Heterojunction OLEDs with a configuration of glass/ITO/PVK/AlQ/Mg/Al were fabricated by using 8-hydroxyquinoline-aluminum (AlQ) as the emission layer (EML) and electron transport layer (ETL) and polyvinylcarbazole (PVK) as the hole transport layer (HTL). The effect of the HTL thickness on the performance of OLEDs was investigated with respect to the driving voltage, turn-on voltage, electroluminescence brightness and efficiency of the devices. Experimental results demonstrate that the optical and electrical properies of OLEDs are closely related to the HTL thickness. The device fabricated with the HTL thickness of 20 nm possesses the best photoelectric properties such as the minimum driving voltage and turn-on voltage, and the maximum electroluminescence brightness and efficiency.     

矿井提升交——交变频装置的应用和发展

介绍了国内煤矿提升交－交变频装置的应用概况;分析了进口装置的使用情况;对交－交变频装置的国产可行性进行了论证,并预测了发展前景。     

热处理对活性层性质及有机光伏电池性能的影响

制备了MEH-PPV活性层薄膜及其器件,通过AFM、透射光谱和伏安特性测量研究了热处理对薄膜表面性质及其光电性能的影响。结果表明热处理降低了表面粗糙度,减小了禁带宽度和电阻率,提高了载流子迁移率。薄膜表面性质以及光电性能的优化,有利于增加有机光伏电池的短路电流、开路电压和填充因子,提高其能量转换效率,改善电池的器件性能。     

Fabrication and characterization of transparent conducting titanium-zinc oxide nanostructured thin films

Nano transparent conducting titanium-zinc oxide (Ti-ZnO) thin films were prepared on glass substrates by radio frequency (RF) magnetron sputtering technique. The deposited films are characterized by X-ray diffraction (XRD), four-probe meter and UV-visible spectrophotometer. The effects of Ti-doping content on the structural, optical and electrical properties of the films are investigated. The XRD results show that the obtained films are polycrystalline with a hexagonal wurtzite structure and preferentially oriented in the (002) crystallographic direction. The structural and optoelectronic characteristics of the deposited films are subjected to the Ti-doping content. The Ti-ZnO sample fabricated with the Ti-doping content of 3% (weight percentage) possesses the best crystallinity and optoelectronic performance, with the highest degree of preferred (002) orientation of 99.87%, the largest crystallite size of 83.2 nm, the minimum lattice strain of 6.263´10-4, the highest average visible transmittance of 88.8%, the lowest resistivity of 1.18×10-3 W?cm and the maximum figure of merit (FOM) of 7.08×103 W-1?cm-1. Furthermore, the optical bandgaps of the films are evaluated by extrapolation method and observed to be an increasing tendency with the increase of the Ti-doping content.     

有机光电器件ITO阳极表面改性及其时效性研究

采用射频氧等离子体(RFOP)处理对氧化铟锡(ITO)薄膜表面进行改性,通过原子力显微镜、X射线光电子能谱、X射线衍射仪和接触角仪等测试表征,研究了改性对ITO表面性质的影响。实验结果表明,RFOP处理优化了ITO表面的化学组分,提高了ITO表面的平整度,改善了ITO表面的物理化学性质。同时,通过接触角监测和表面能计算,研究了ITO表面RFOP改性的时效性,结果证实,ITO表面优化后的物理化学性质随存放时间增加而逐渐退化。另外,采用改性后不同存放时间的ITO衬底作为阳极,制备了有机发光器件,通过测量光电特性,进一步研究了ITO表面性质对器件性能的影响。     

CG125摩托车气缸头专机生产线

介绍了CG125摩托车气缸头专机生产线的工艺方案以及线上采用的关键技术,并且对部分重要部件以及加工方法作了较详细的叙述.