FT─IR技术在半导体材料中的应用

介绍了ＦＴ－ＩＲ测量技术在半导体材料中的应用。对Ｓｉ、ＧａＡｓ等材料的试样制备、杂质缺陷的测量及光谱研究进行了全面报道。大量实验结果表明，该技术是研究半导体材料结构、成分、杂质和缺陷特性的有效方法。     

Effectiveness of 0.08 molar iodine in ethanol solution as a means of chemical surface passivation for photoconductance decay measurements

In a recent study of various chemical passivation solutions, Horanyi et al. suggested that 0.08 molar ethanol/iodine solution is an effective passivating medium for silicon surfaces. However, other work suggested that the degree of surface passivation for this solution is low compared to that achieved by corona discharge passivation. In this article it is shown that in combination with a bias light, the surface passivation of 0.08 molar ethanol/iodine solution can be of superior quality compared to thermally grown passivating oxides. Since the degree of surface passivation can be bounded, this method also allows extraction of a bulk lifetime estimate.     

Multielectrode Semiconductor Lasers^①②

Multielectrode semiconductor lasers are studied via the ray method.The expression of the output photon number of N-electrode semiconductor lasers has been derived for the first time.When N=1 or 2,the expression of the output photon number fits in that of one-electrode(general)or two-electrode semiconductor lasers perfectly.     

MnQ2（Q=S,Se,Te）and [Mn（en）3]Te4 Structures and Their Semiconductor Properties

The solvo-thermal technique is used for the synthesis of [Mn(en)3]Te4 (I).The crystal structure has been determined by single crystal X-ray diffraction techniques.The crystal belongs to the monoclinic, space group p21/c with unit cell:a=0.8461(1),b=1.5653(2), c=1.4269(2)nm, α=90°,β=91.37(1) (3)°, γ=90°,V=1.8893(4)nm3,and Z=4.The results show that the structure contains a linear chain Zintl anion,[Te4]2-and a complex cation,[Mn(en)3]2+. Optical studies have been performed on the powder sample of I, suggesting that the compound is a semiconductor with a band gap of 0.73eV. The semiconductor properties for MnQ2(Q=S,Se,Te) and [Mn(en)3]Te4 have been discussed by molecular orbital theory.     

大流量超纯氢气纯化设备制造技术

超纯氢气（大于6N）是半导体硅外延等工艺必备的工艺气体。文章介绍了利用超低温吸附的方法提纯大流量超纯氢气的工作原理，设备制造中的关键技术问题及难点，以及利用该技术制造的大流量超纯氢气纯化设备的使用效果。     

微透镜面形误差影响LD光束准直的研究

采用求解几何光学点列图的办法,针对半导体激光器准直微透镜各种不同的面形误差,用实例分析计算了它们对LD光束准直的影响,从结果可看出中部出现微小偏差的微透镜对LD光束准直效果优于具有其他类型偏差的微透镜,并针对具体情况给微透镜阵列的制作提供参考。     

硅微条粒子探测器

本文介绍了硅微条粒子探测器的研究情况，侧重于器件的基本结构及其工作原理。     

三源真空蒸发CuInSe_2薄膜的性能

详细分析讨论了用三源真空蒸发法制取CuInSe2薄膜过程中，源温、衬底温度及Cu，In原子比值对薄膜性能的影响。     

检测表面粗糙度的光纤传感器研究

论述了测量表面粗糙度的反射散射比光纤传感器的结构、工作原理。介绍了它具有的抗干扰能力强、测量精度高、重复性好、可测微小面积和孔洞底面等异型表面等特点。给出了实测结果 ,并对影响测量的各种因素进行了分析讨论     

Review of surface photovoltage spectra of nano-sized semiconductor and its applications in heterogeneous photocatalysis

Heterogeneous photocatalysis is a promising technique valuable for environmental purification. Nano-sized semiconductors such as ZnO and TiO₂, which is one of the most basic functional materials, have emerged as effective photocatalyst materials. The surface photovoltage spectra (SPS) can be an effective method for quickly evaluating the photocatalytic activity of semiconductor materials since it can provide a rapid, non-destructive monitor of the semiconductor surface properties such as surface band bending, surface and bulk carrier recombination and surface states, mainly showing the carrier separation and transfer behavior with the aid of light, especially the electric-field-induced surface photovoltage spectra (EFISPS), in which SPS is combined with the electric-field-modified technique. In this review, the basic principles, measurement and applications of the SPS and EFISPS are mainly discussed together with some fundamental aspects like the electric properties of semiconductor surface and the principle of electric field effect. In particular, the applications of SPS to nano-sized semiconductors such as ZnO and TiO₂ in heterogeneous photocatalysis are emphasized, which involve mainly evaluating the photocatalytic activity by analyzing semiconductor surface properties such as the separation efficiency of photoinduced carriers under illumination by the SPS measurement, highlighting our own contributions. The results show that the weaker the surface photovoltage signal is, the higher the photocatalytic activity is in the case of nano-sized semiconductor photocatalysts.