开发投影光源—超高性能（UHP）放电灯的体会

我们开发成功一种适用于液晶投影显示的超高性能放电灯UHP（150W）,与日本同类产品比较,在光、电、色等参数和光谱能量分布上,基本一致。本文根据笔者在开发过程中的体会,着重介绍液晶投影电视对光源的要求和选择,以及在研发过程中遇到的问题和解决办法。     

光强对有机小分子太阳电池光伏性能的影响

采用真空蒸镀的方法,制备了ZnPc(40 nm)/C60(20 nm)结构的电池,重点研究了不同光强测试条件下,ZnPc/C60电池光伏性能的变化情况。发现开路电压(Voc)和填充因子(FF)随光强呈现对数式的变化趋势,前者逐渐上升而后者则下降,短路电流与光强的关系为Jsc∝E1.13,电池的功率转换效率(η)随光强稳步上升。拟合计算得到电池的理想因子n=1.93;100 mW/cm2辐照条件下,Rs=25Ω,Rsh=116Ω;分析认为,器件的准费密能级分裂程度随光强增强而增大是导致开路电压增大的原因;而Jsc-E强于正比关系则是C60产生激子对电流有辅助贡献的结果。     

冷光源检测晶片键合质量的实现

利用红外透射原理,即根据键合晶片中键合部分可以透光而未键合部分几乎不能透光的原理,同时采用冷光源的独特方法构建了键合质量测试平台以用于初步筛选符合下一步工艺探索的高质量键合晶片.     

辅助灯法测量LED灯光通量的研究

分析积分球测量LED灯光通量的原理,介绍两种测试方法(比较法和辅助灯法)的理论依据,然后通过实验进行验证,最后总结适用辅助灯法进行测试的情况。     

用于光刻成像技术中的双腔准分子光源

MOPA(MasterOscillator&PowerAmplifier)是采用双腔技术的准分子光源,它的成功量产将向光刻工厂提供前所未有的光谱带宽性能和输出功率,并大大降低成本,而且还适用于所有DUV曝光波长。     

A Light Source for Pupil Stimulation

For satisfactory controllable light stimulus to be used for experiments on the human pupillary servomechanism, we designed a system using a potassium dihydrogen phosphate (KDP) electrooptic light modulator and an amplifier capable of giving a suitable high-voltage signal.     

Qualification Testing of Flat-Plate Photovoltaic Modules

The placement of photovoltaic modules in various applications, in climates and locations throughout the world, results in different degrees and combinations of environmental and electrical stress. Early detection of module reliability deficiencies via laboratory testing is necessary for achieving long, satisfactory field service. This overview paper describes qualification testing techniques being used in the US Department of Energy's flat-plate terrestrial photovoltaic development program in terms of their significance, rationale for specified levels and durations, and test results.     

一种抗干扰涡流检测激励信号源的设计

为提高涡流检测中激励信号源的精度,介绍了一种应用线性控制理论设计涡流检测激励信号源的方法。首先,构建了多输入单输出(MISO)反馈控制系统,实现对涡流传感器的恒流驱动;其次,设计了模块电路,分析了MISO反馈控制系统的稳定性和系统干扰的来源与抑制方法;最后,建立该系统的数学模型,对系统的稳定性及带宽进行了仿真实验,并应用PCB铜箔测厚仪对所设计的信号源进行了负载效应及温度试验。仿真及实验结果皆表明,相比于传统的开环恒压驱动激励信号源,该信号源不仅具有较稳定的激励电流和较强的抗干扰能力,还具有较小的温漂及较强的负载稳定性,从而保证了基于该信号源的测厚仪具有更高的测量精度。     

A New Light Source for EUV Lithography

A new type of X-ray laser could give hope to the semiconductor industry as it struggles to continue its march toward miniaturization. This next-generation chip-making tool was developed at the National Science Foundation's Engineering Research Center for Extreme Ultraviolet Science and Technology, located at Colorado State University, in Fort Collins.The laser operates at wavelengths of 18.9 and 13.9 nanometers, the latter fine enough for extreme ultraviolet (EUV) lithography, which will be needed to manufacture the generation of chips that are to become available around 2011.     

Light emission as an analysis tool for GaAs ICs

As GaAs IC integration continues, device characterization and failure analysis get more difficult to perform. Standard visual and electrical inspections are becoming less adequate to evaluate devices and determine root cause of failures. A relatively new technique, used for several years on silicon devices, is light emission microscopy. The properties of light emission on silicon devices have been known for several decades. The light-producing properties of GaAs, a direct bandgap material, make it a natural for light emission study. This overview is intended to discuss the methodology and results of GaAs MESFET light emission.     

Photovoltaic Characterizations of Crisscrossed-Silicon-Nanorod Solar Cells

A comparative study on photovoltaic characterizations in crisscrossed-silicon-nanorod (CSNR) solar cells with an n-type-CSNR/intrinsic-CSNR/polycrystalline-silicon/p-type-Si(100)-stacked structure was demonstrated by means of the vapor–liquid–solid technique. Results reveal that an improved conversion efficiency of $sim$1.66% and an external quantum efficiency (EQE) of $sim$29% at 690 nm were obtained. The CSNR reflectance was lower than 2% for the 200–1100-nm wavelength range. By developing a proper growth time, the CSNR solar cell has a larger EQE. The mechanisms related to excellent light trapping and a larger EQE were mainly due to the CSNR microstructure.      

The Metrology Light Source of PTB – a Source for THz Radiation

The Physikalisch-Technische Bundesanstalt (PTB), the German national metrology institute, operates the low-energy electron storage ring Metrology Light Source (MLS) in Berlin-Adlershof in close cooperation with the Helmholtz-Zentrum Berlin (HZB). The MLS is designed and prepared for a low-α machine optics mode based on a sextupole and octupole correction scheme, for the production of coherent synchrotron radiation in the far-IR and THz region. In our contribution we present commissioning results, which clearly indicate that the MLS, in combination with dedicated beamlines, offers intense, stable, and well-focused THz radiation. We discuss the planned use of the MLS for metrology in the THz spectral range.     

太阳能照明系统光源的选择

为了探究太阳能照明系统光源,验证LED用于太阳能照明的可行性,文章对不同批次的大功率白光LED进行了相关测试,并介绍了太阳能照明系统的组成,对不同使用场合的光源进行了比较,为太阳能照明系统光源的选择及进一步研究提供了参考。     

差分吸收光谱测量中LED光源恒温控制的实现

提出了一种差分光学吸收光谱（DOAS）测量中LED光源的恒温控制方法。采用半导体制冷片作为控温元件来控制LED温度,应用PID算法动态调节半导体制冷片的工作电流,实现了DOAS测量过程中LED光源的温度恒定。介绍了恒温控制系统的硬件设计和软件流程,并对控温效果和LED谱的稳定性进行了测试。测试结果表明,提出的恒温控制方法能有效克服环境温度变化对LED光源温度的影响,温度控制精度达到了±0.1℃。在相同的测试条件下与无恒温相比,具有恒温功能的LED光源剩余噪声明显偏低,进一步验证了设计方案的可行性。     

环保型新光源--无汞金属卤化物灯

近年来从环境保护和节约能源的观点出发,开发了新型无汞金属卤化物灯,该灯包括充氙气的金属卤化物灯和电感耦合型无电极金属卤化物灯.本文主要介绍该类灯的结构、特性、测量方法和技术的进展.     

Indoor Power Harvesting Using Photovoltaic Cells for Low-Power Applications

Utilization of low-power indoor devices such as remote sensors, supervisory and alarm systems, distributed controls, and data transfer system is on steady rise. Due to remote and distributed nature of these systems, it is attractive to avoid using electrical wiring to supply power to them. Primary batteries have been used for this application for many years, but they require regular maintenance at usually hard to access places. This paper provides a complete analysis of a photovoltaic (PV) harvesting system for indoor low-power applications. The characteristics of a target load, PV cell, and power conditioning circuit are discussed. Different choices of energy storage are also explained. Implementation and test results of the system are presented, which highlights the practical issues and limitations of the system.     

Fabrication of CIGS Films by Electrodeposition Method for Photovoltaic Cells

Cu(InGa)Se₂ (CIGS) thin films were fabricated by electrochemical deposition in a single bath containing Cu, In, Ga, and Se ions. The electrolyte was prepared by dissolving CuCl₂, InCl₃, GaCl₃, H₂SeO₃, and LiCl in deionized water. The potentiostatic deposition process was achieved by applying a voltage ranging from ?0.5?V to ?0.8?V versus Ag/AgCl. The effects of different chemical bath concentrations on the film composition and morphology were investigated. Stoichiometric CIGS film composition could be achieved by controlling the chemical compositions of the bath and the voltage. Gelatin was added to the solution to improve the surface and microstructures of the CIGS film. The as-deposited films were annealed at 500°C in Ar atmosphere for crystallization. The structural, morphological, and compositional properties of the CIGS thin films before and after annealing were examined by x-ray diffraction, scanning electron microscopy, and energy-dispersive spectroscopy. This study showed that the composition of the CIGS films is dependent on the bath concentration, whereas the applied potential had relatively less effect on the CIGS film composition. In addition, the use of gelatin helped in the fabrication of crack-free CIGS thin films with greatly improved surface morphology.     

面向DWDM系统光源的激光器技术

在光通讯DWDM系统中，激光器作为光源对提高单路速率发挥着核心作用，激光器光源技术发展惊人，各种激光器技术得到了广泛应用。文中分析和研究了光纤通信应用于DWDM系统的MQW-DFB激光器，光纤光栅激光器及构成SC光源的锁模激光器的技术、特点以及应用前景。     

用于仪器照明的电致发光光源的研制

根据用户夜间室外工作的需要 ,对电致发光的发射光谱和功率损耗做了较为深入的研究。发现电致发光功率损耗与白炽灯相比是很小的 ,电致发光光谱与人眼视见函数曲线是相适应的。本文首次提出用电致发光新光源代替白炽灯作仪器内分划照明光源 ,它具有耗电省、体积小、重量轻、发光均匀柔和与人眼视见函数相适应等优点。     

测量大数值孔径光学系统小光斑的方法

介绍了一种小孔扫描测量大数值孔径光学系统小光斑的方法。利用近场光学显微镜的光纤探针采样技术和压电陶瓷扫描技术 ,可对光学系统小光斑的光强分布进行高空间分辨的测量。由于光纤探针采样点的大小为几十纳米或更小 ,压电陶瓷扫描间距为几纳米或更小 ,因此该方法特别适合大数值孔径光学系统小光斑的测量。实验证明 ,采用该方法 ,测量的空间分辨率可达 5 0～ 10 0nm左右。