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1.
陈章基  林云 《电子器件》1997,20(4):50-54
由于FeS2具有窄的禁带宽度(Eg=0.95eV)和高的吸收系数(a〉6×10^5cm^-1),使它成为一种很有发展前途的太阳能材料。本文主要介绍了用射频溅射制备铁膜,然后在真空中(10^-1Pa),通过控制时间和温度进行硫化。经XRD和AES对薄膜进行分析,表明试样在硫化温度T=400℃,时间t=48h的条件下,Fe膜转变为FeS2膜。  相似文献   

2.
a-SiGe:H材料的光电性能强烈地依赖于沉积条件,选择适当的氢稀释率、气体压强,掺锗率和辉光功率,获得了光带隙为1.45eV,光暗电导比为1.6×10^5的高质量a-SiGe:H材料。  相似文献   

3.
钝化膜抗γ辐照的研究   总被引:1,自引:1,他引:0  
研究了几种不同的钝化膜的γ辐照特性,初步揭示单纯的SiO2膜不具备抗γ辐照的能力,厚度为100nm涂有聚酰亚胺的SiO2膜当辐照剂量小于10^6拉德(Si)时具有良好的抗γ辐照作用。同时指出了四甲基氢氧化胺对Si-SiO2界面也有影响。  相似文献   

4.
测量了缝电极和梳形电极a-Si:H样品的光伏安特性和光电灵敏度,撮由光电灵敏度计算电荷放大增益的方法,由此法测现的a-Si:H的电荷放大增益,在10^5V/cm电场下,高达4.3×10^3、本文从能态图讨论了a-Si:H中电荷放大效应的产生过程。由测量的增产佃值计算了电子迁移率与寿命之积。  相似文献   

5.
根据电流连续性原则和光伏材料选择原则,对叠层电池的电流匹配进行了研究,结果表明,电流匹配是影响叠层电池短路电流和转换效率的重要因素之一,电流匹配可以通过调整单元电池厚度来实现,在此基础上,获得了面积为400cm^2,转移效率分别为8.28%,7.52%和6.74%的a-Si/a-Si,a-Si/a-SiGe和a-Si/A-Si/a-SiGe高效率叠层电池。  相似文献   

6.
本文对射频溅射法淀积的a-SiC∶H膜热退火形成6H-SiC相进行了研究.我们采用红外透射谱、喇曼背散射谱和X光衍射谱来研究退火形成6H-SiC的过程.在较高的射频功率下淀积的a-SiC∶H膜经800℃60分钟等时退火后转变为6H-SiC相,该温度低于在低功率下制备的a-SiC∶H形成6H-SiC的温度(1000℃).高功率可导致6H-SiC形成温度的降低与膜中硅及石墨团簇的消失,同时高能量的氩离子轰击可使膜中氢含量减少及各组分均相.通过改变射频功率,本文研究了氩离子轰击对a-SiC∶H膜及形成6H-Si  相似文献   

7.
本对射频溅射法沉积的a-SiC:H膜热退火形成6H-SiC相进行了研究。我们采用红外透射谱、喇曼背散射谱和X光衍射谱来研究退火形成6H-SiC的过程。在较高的射频功率下沉积的a-SiC:H膜经800℃60分钟等时退火后转变为6H-SiC相,该温度低于在低功率下制备的a-SiC:H形成6H-SiC(1000℃)。高功率可导致6H-SiC形成温度的降低与膜中硅及石墨团簇的消失,同时高能量的氩离子轰击  相似文献   

8.
报道了YBa2Cu3O6.3和PrBa2Cu3O6.3多晶陶瓷c抽取向薄膜中的红外光谱,在PrBa2Cu3O6.3中以9个声子模,对应于5Eu+4A2u振动。在YBa2Cu3O6.3材料中观察到10个声子模,对应于6Eu+4A2u振动,其中Pr的Eu和A2u模分别为位于170cm^-1和198cm^-1,Y和Eu和A2u模分别位于191cm^-1和217cm^-1PrBa2Cu3O6.3和YBa2  相似文献   

9.
本文对30kev Si^+和分子离子SiF^+注入半绝缘GaAs的行为进行了研究对比。注入Si^2+样品的Si原子纵向分布与相同条件下用SICT模拟程序理论计算出的分布相一致。经灯光900℃10″RTA,电激活率可达60%,电化学C-V测得的载流子纵向分布与注入态SIMS结果相同,可以获得近0.2μm的GaAs有源层。而注入分子离子SiF^+样品,虽注入层较浅,但灯光退火后,电激活率很低。因此,用  相似文献   

10.
采用PECVD技术,以TEOS为源,对In0.53Ga0.47As材料进行表面钝化,研究了SiO2/In0.53Ga0.47As的界面态,提出降低界面态密度的方法,使其降低到8.5×10^10eV^-1cm^-2。  相似文献   

11.
DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.  相似文献   

12.
From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.  相似文献   

13.
The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.  相似文献   

14.
The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.  相似文献   

15.
Today, micro-system technology and the development of new MEMS (Micro-Electro-Mechanical Systems) are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.  相似文献   

16.
This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel's.  相似文献   

17.
A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.  相似文献   

18.
A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.  相似文献   

19.
Call for Papers     
正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks  相似文献   

20.
正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first  相似文献   

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