N Doping and Al-N Co-doping in Sol–Gel ZnO Films: Studies of Their Structural,Electrical, Optical,and Photoconductive Properties

We have studied the structural, electrical, optical, and optoelectronic properties of N-doped and Al-N co-doped ZnO films grown by sol–gel technique. Both the undoped and doped films have a hexagonal wurtzite-type structure. The undoped film shows a very low electron concentration. The N-doped film exhibits an anomalous conduction type, while the Al-N co-doped film shows relatively stable p-type conduction. Though the transparency in the visible region is retained in the doped films, its optical qualities are degraded as indicated by photoluminescence results. The N-doped film has better response to ultraviolet light compared with the undoped and co-doped films. These results are important for the growth and development of p-type ZnO films using the very low-cost sol–gel method.     

YAG:Nd,Li激光晶体的性能

在短波长光谱区出现吸收带是由于基质中电子缺陷造成的,这对于YAG单晶的激光性能足不利的。这种吸收带由于在200～400毫微米区抽运光形成的,应用合适的滤光片能够强烈地减少谐振腔的染色,但是该系统的电子量子效率也降低。     

能量损失谱仪B,C,N元素分析

能量损失谱仪是近几年发展起来的一种新的元素分析仪(1)。它的主要优点是能够有效地分析轻元素。这一优点是能谱仪和波谱仪所不能比拟的。到目前为止,利用该仪器对固体样品进行元素分析还很少见。本文利用能量损失谱仪对矿物样品进行了B,C,N元素测定,得到了比较理想的结果。试验仪器是日本产H—800透射电镜所附带的能量损失谱仪,其型号为H—8020。光路原理示于图1。     

(Na,K,Li)(Nb,Sb)O3无铅压电陶瓷的性能

采用传统的固相反应法和普通烧结工艺,制备了A位和B位复合的(Na0.5+xK0.44Li0.06–x)Nb0.95Sb0.05O3(x=0,0.006,0.012)系无铅压电陶瓷样品,并对样品的压电、机电性能进行了研究。结果表明:该陶瓷系列具有很高的压电应变常数(x=0.006时d33=243pC/N)、低的介质损耗(tanδ<2×10–2)、较高的机电耦合系数(x=0.012时,k33=0.632)、高的铁电顺电相变温度(tC约400℃)。这些性能显示了它是一种替代铅基PZT的具有很好应用前景的无铅压电陶瓷。     

Xerox Docuprint N32,vs,Hewlett-packard laserJet 8000N——网络打印机提供的更多性能

不必在打印机旁排队等候取得打印结果了，今天的网络打印机比以往的打印机更快，也更智能化，它们能在很短的时间内完成打印作业并且娴熟地将打印作业并且娴熟     

An omnipotent Li–ion battery charger with multimode control and polarity reversible techniques

The omnipotent Li–ion battery charger with multimode control and polarity reversible techniques is presented in this article. The proposed chip is fabricated with TSMC 0.35μm 2P4M complementary metal-oxide- semiconductor processes, and the chip area including pads is 1.5 × 1.5 mm². The structure of the omnipotent charger combines three charging modes and polarity reversible techniques, which adapt to any Li–ion batteries. The three reversible Li–ion battery charging modes, including trickle-current charging, large-current charging and constant-voltage charging, can charge in matching polarities or opposite polarities. The proposed circuit has a maximum charging current of 300 mA and the input voltage of the proposed circuit is set to 4.5 V. The maximum efficiency of the proposed charger is about 91% and its average efficiency is 74.8%. The omnipotent charger can precisely provide the charging current to the battery.     

Descriptions,Aims and Scopes

Established in 1984, the Journal of Electronics (China) is the earliest English journal in Electronics in China. Consecutively published since then, the Journal has been vitnessing and publishing the development of the Electronics in China and beyond.Journal of Electronics (China) is designated to provide a forum for the top quality of the research achievements of a broad blend of disciplines in Electronics and Information Sciences in order to promote rapid communications and exchanges am…     

陶瓷添加剂MnO2,Fe2O3,Li2CO3的热分析

陶瓷添加剂能使陶瓷材料具有良好的烧结状态和最佳的压电性能。本文作者采用Ｄｕｐｏｎｔ—２０００型热分析仪对常用添加剂ＭｎＯ２、Ｆｅ２Ｏ３、Ｌｉ２ＣＯ３进行了ＤＴＡ、ＴＧＡ分析，研究了几种物质在烧结过程中的物理、化学变化。     

Descriptions, Aims and Scopes

Established in 1984, the Journal of Electronics (China) is the earliest English journal in Electronics in China. Consecutively published since then, the Journal has been vitnessing and publishing the development of the Electronics in China and beyond.     

Descriptions, Aims and Scopes

Established in 1984, the Journal of Electronics (China) is the earliest English journal in Electronics in China. Consecutively published since then, the Journal has been vitnessing and publishing the development of the Electronics in China and beyond. Journal of Electronics (China) is     

Descriptions,Aims and Scopes

Established in 1984, the Journal of Electronics (China) is the earliest English journal in Electronics in China. Consecutively published since then, the Journal has been vitnessing and publishing the development of the Electronics in China and beyond.     

adcast and television,rel

最近为朋友找一款工作稳定能接收天浪卫视的卫星接收机而颇费周折,最终还是找到了比较满意的接收机,这就是银河2580I数字机。香港天浪卫星直播电视,采用的是爱迪德加密系统,原则上只要是兼容这个加密系统的接收机都可以使用,然而在使用中发现,常见的接收机或多或少都有一些小缺     

Electrochemical C-V Characteristics and Photoluminescence of a-C∶N Films

Amorphous carbon (a-C) films and amorphous carbon films incorporating with the nitrogen (a-C∶N) were deposited on silicon substrates in a radio-frequency driven plasma enhanced chemical vapour deposition system, while the surface electrical properties of films were investigated by electrochemical capacitance-voltage measurements. It was examined the effect of the interface defects on the properties and deduced that the conducting type of a-C∶N films was n-type. Subsequently, a comparative studies of a-C and a-C∶N films were performed by photoluminescence spectra depending on the temperature. With the decrease of the temperature, the main band with peak energy of 2.48 eV in the a-C∶N films was more intense compared with the other three bands caused by amorphous C in the a-C films.     

N0413N／N0601N：功率MOSFET

瑞萨电子公司推出开发面向消费类产品（如无线电动工具和电动自行车）中电机驱动的100A大电流功率MOSFET。新款功率MOSFET提供了较宽的电压范围，其中3款新产品（包括NO413N）具有40V的电压容差，而另外3款新产品（包括NO601N）具有60V的电压容差。器件功率损耗水平低低，能延长电池寿命。     

Efficient Blue Organic Light-emitting Diodes with Simple Structure Based on N,N′-bis （1-naphthyl）-N,N′-biphenyl-1, 1′-biphenyl-4,4′-diamine

Small molecular Organic light-emitting diodes （OLEDs） with high efficiency composed of 2,9-dimethyl-4,7-diphenyl-l,10-phenanthroline （BCP） and N, N%bis-（1-naphthyl）-N, N′,bipheny1-l,1′-biphenyl-4,4′- diamine （NPB） as an electron transporting layer and an emitting layers respectively were studied. Two devices of indium-tin-oxide （ITO）/NPB/BCP/8-hydroxyquinoline aluminum （Alq3）/Mg：Ag and ITO/NPB/BCP/ Mg：Ag with unique simple structure were fabricated. The luminance-voltage and current density-voltage characteristics of devices were investigated. The results demonstrated that the maximum luminance of the double and triple-layer devices is 11500cd/m^2 and 5000 cd/m2 at 15V, respectively. The maximum luminous power efficiency is 1.21m/W at the luminance of 300cd/m^2 and the luminous efficiency of 2.7cd/A. The peak of Electroluminescence （EL） spectrum locates at 433nm and the Commissions Internationale d＇Eclairage （CIE） coordinates are （0.18, 0.17）, which is consistent with the Photoluminescent （PL） spectrum of NPB. The bright blue light emission is independent on the variation of bias voltage. The diversity of device performance with two different structures was discussed.     

Organic photovoltaic devices based on pentacene/N,N′-dioctyl-3,4,9,10-perylenedicarboximide heterojunctions

We have studied an organic photovoltaic cell based on an efficient donor/acceptor combination of pentacene/N,N′-dioctyl-3,4,9,10-perylenedicarboximide (PTCDI-C₈) heterojunctions. Photocurrent spectra exhibited excellent light harvesting throughout the visible spectrum with maximum external quantum efficiency (EQE) of ～60%. PTCDI-C₈ layer provided significant contribution to the photocurrent due to its strong absorption properties and efficient exciton dissociation at pentacene/PTCDI-C₈ interface. Power conversion efficiency of about 1.2% has been achieved under AM 1.5 illumination. The device showed a low series resistance of 18 Ω cm² and a high shunt resistance of 2.5 kΩ cm², resulting in a high fill factor of 65%.