叠层HgCdTe光导器件载流子浓度分布及器件性能

根据Ｍ．Ａ．Ｋｉｎｃｈ提出了的叠层结构，从解一维连续性方程出发，对有叠层和无叠层器件光生载流子浓度空间分布进行了计算和分析，结果表明，叠层结构相当提供一个少数载流子存储区，可有效抑制扫出效应，提高体内光生载流子的平均浓度，从而提高响应率，实验上采用两种工艺实现了有叠层结构，并给出了器件性能的测量结果。     

阻挡层对静电潜影稳定性的作用

本文介绍了静电照相的基本原理，考察了在光导体与基板之间和在光导体表面加入阻挡层，阻挡层材料及厚度对静电潜影的影响。     

Full‐color photo‐addressable electronic paper using cholesteric liquid crystals and organic photoconductors

Abstract— Full‐color photo‐addressable electronic paper using cholesteric liquid crystals and organic photoconductors was developed. The electronic paper is comprised of two stacked photo‐addressable elements displaying blue/green and red images, respectively. Each photo‐addressable element was independently controlled by two different color‐addressing lights. Furthermore, blue and green images were selectively switched by one organic photoconductor using the threshold characteristics of cholesteric liquid crystals. A highly reflective polymer‐dispersed cholesteric liquid‐crystal (PDCLC) layer was obtained by a new formation process based on the sol‐gel transition behavior of a gelatin matrix and an agar overcoat layer. The PDCLC layer had a close‐packed honeycomb‐like monolayer structure with a flat surface. The A6‐sized prototype had paper‐like features and showed full‐color bistable images instantly written with a viewer‐type writing apparatus.     

AlN光电导X-射线探测研究

使用AlN制备了光电导结构的X-射线探测器,研究了探测器对X-射线强度的响应。探测器具有很小的漏电流,在100V的偏压下小于0.1 nA。光电流测量表明：X-射线强度与探测器的光电流成平方关系,并且在强X-射线照射下,光电流与暗电流之比可达到10。利用ABC模型,对探测器的X-射线强度响应特性进行了分析,给出了很好的物理机制解释。     

FDTD analysis of photoconducting antennas for millimeter‐wave generation

In this paper, a hybrid numerical technique is presented for modeling a photoconducting antenna structure designed for optoelectronic generation of millimeter waves. The technique interfaces the solid‐state device model with the three‐dimensional (3D) finite‐difference time‐domain (FDTD) method to achieve the active antenna modeling effectiveness and efficiency. The FDTD algorithm is applied to simulate the passive part of the antenna structure, whereas the numerical device simulation is employed to model the photoconductor that is illuminated by lasers. Physical performance of the photoconductor and response of the antenna are analyzed. Numerical results show good correlation with the experimental result and consequently demonstrate the feasibility of the full‐wave modeling. © 2000 John Wiley & Sons, Inc. Int J RF and Microwave CAE 10: 213–220, 2000.     

碲镉汞光导探测器在中红外激光测量中的热问题

为了准确测量中红外高能激光系统的远场功率密度时空分布等参数,分析了室温光导型碲镉汞(HgCdTe)探测器在环境温度变化和光热效应情况下存在的探测器光敏元温升等热问题,并分别给出了应对措施。从HgCdTe的电学参数经验公式和光导型探测器工作原理出发,分析了暗电阻和响应率与光敏元工作温度的相关性。建立了计入接触热阻和自然对流效应的光导型HgCdTe探测器热分析模型,并对模型进行了实验验证。分析了光敏元与环境温度间的热平衡时间特性,提出了连续激光测量中的环境温度校正模型。讨论了激光辐照下探测器的动态响应特性,给出了激光加热探测器光敏元导致的附加光热信号的修正方法,该方法在典型应用条件下可将测量系统的单通道测量不确定度降低2%以上。目前,所述方法均已成功应用于多套远场激光光斑定量测量系统。     

有机光导材料酞菁氧钛制备及应用

介绍了有机光导材料酞菁氧钛 (TiOPc)的两种主要制备方法 ,以及各种晶型之间的转化方法 ,论述了TiOPc作为有机光导材料应用于光导体中的研究进展 ,并对相关领域的研究热点和发展动向进行了展望     

低惰性高分辨率的硒化镉摄像管靶面

介绍了一种改进了的硒化镉摄像管靶面,该靶面由光电导层硒化镉、氧化层硒酸镉、传输层及扫描阻挡层硫化锑组成。传输层独创性地采用了具有内建电场作用的非晶态 As_2Se_3和高暗电阻率材料的非晶态 As_1Se_9的复合结构,从而使靶面的惰性和分辨率得到了显著改善。比较详细地分析了这种靶面的工作原理,同时还介绍了制作这种靶面的工艺方法。     

Photoresponse of high resistivity cadmium telluride between room temperature and 400°C

The behavior of CdTe as an infrared photodetector to operate at 400°C over the range between 0.8 and 1.2 μ was studied. It was shown that chlorine-doped CdTe indeed can be prepared to possess signal-to-noise ratios at 400°C of 50:1 at 50 μW/cm² of illumination with a 1 kHz bandwidth. Furthermore, iridium has proven to be a stable contact, and 1000-hr life tests of Ir-contacted CdTe chips in hermetically sealed, gas filled T08 transistor headers showed no significant variations in the signal-to-noise ratios.     

电子传输材料及其在有机光导体中的应用

电子传输材料按其结构可分为多硝基化合物,氰基化合物,醌类化合物和萘的酸酐衍生物等。用它们制备的载流子传输层因其表面负载正电荷而不产生臭氧,所以用于制备环保型正电性有机光导体。本文重点讨论了醌类电子传输材料在单层、双层及双极性光导体中的应用研究进展。