Improved device reliability in organic light emitting devices by controlling the etching of indium zinc oxide anode

A controllable etching process for indium zinc oxide （IZO） films was developed by using a weak etchant of oxalic acid with a slow etching ratio. With controllable etching time and temperature, a patterned IZO electrode with smoothed surface morphology and slope edge was achieved. For the practical application in organic light emitting devices （OLEDs）, a sup- pression of the leak current in the current-voltage characteristics of OLEDs was observed. It resulted in a 1.6 times longer half lifetime in the IZO-based OLEDs compared to that using an indium tin oxide （ITO） anode etched by a conventional strong etchant of aqua regia.     

基于霍尔效应的角位移传感器演示仪

应用霍尔效应实现了对角度改变的显示,把一个非电量转换成电量输出,使得容易实现对角度的测量和自动控制。     

红外探测装置中光谱分光镜的设计与制备

在红外探测装置中,光谱分光镜是用来把3 μm～5 μm和8 μm～12 μm 2个波段的光谱分开的零件.介绍了一种在通用镀膜机上制备光谱分光镜的新工艺.在该膜系的设计过程中,把Willey公式引入到对其平均透过率最高值进行估算的过程中,同时针对国产镀膜机控制精度不高的特点,尽量使用规整膜层进行设计.为了进一步提高8 μm～12 μm波段的透过率,在膜系的最外侧引进了一层自行配制的低折射率氟化物材料,制备出了符合技术指标的红外光谱分光镜.     

Realization of Tip Tilting By 8-Step Line Tilting

By direct calculation of rotation matrices of SO（3）, we show how certain specific sequence of eight consecutive rotations of digital angles can yield a tilting of a facet mirror. We also design a detailed program specifically to tilt an array of mirrors from planar orientation to the required focusing orientation. We describe how to use the 8-step to realize the focusing of the mirror array. We have found, in our designed program, an important feature of row-sharing during the rotations for the columns and similarly the column-sharing during the rotations for the row. This feature can save a lot of operating time during the actual realization of the mechanical movements.     

天文观测相机低噪声CCD视频处理电路的分析与设计

在讨论天文观测相机低噪声视频处理电路的基础上,对前置放大、差分放大、可编程增益放大、相关双采样及16bit模数转换等关键组成部分进行了分析,给出各组成部分的设计方法。对所设计的低噪声视频处理电路进行了PSPICE仿真和实验测试,仿真和实验结果表明,该视频处理电路在本身引入噪声较小的同时,有效地抑制了CCD的复位噪声和1/f等低频噪声,使天文观测相机的整机噪声<15e-,达到了指标要求。     

激光指示器光轴调校技术

利用反射式光学系统对激光指示器的光轴进行了调校。提出了激光指示器及观瞄装置的光轴校正方案,并建立了调校装置。该装置由离轴抛物面反射镜、十字靶标、背景光源、图像采集装置及其它附件组成。对调校装置的测量精度进行了标定和计算。结果表明,该装置的测量精度可达到0.05mrad。利用该装置对激光指示器的光轴进行了调校,并给出了系统示意图和测试效果。     

Ordered conducting polymer multilayer films and its application for hole injection layers in organic light-emitting devices

We reported a controlled architecture growth of layer-ordered multilayer film of poly(3,4-ethylene dioxythiophene) (PEDOT) via a modified Langmuir-Blodgett (LB) method. An in situ polymerization of 3,4-ethylene dioxythiophene (EDOT) monomer in multilayer LB film occurred for the formation of ordered conducting polymer embedded multilayer film. The well-distribution of conducting polymer particles was characterized by secondary-ion mass spectrometry (SIMS). The conducting film consisting of ordered PEDOT ultrathin layers was investigated as a hole injection layer for organic light-emitting diodes (OLEDs). The results showed that, compared to conventional spin-coating PEDOT film and electrostatic self-assembly (ESA) film, the improved performance of OLEDs was obtained after using ordered PEDOT LB film as hole injection layer. It also indicated that well-ordered structure of hole injection layer was attributed to the improvement of OLED performance, leading to the increase of charged carrier mobility in hole injection layer and the recombination rate of electrons and holes in the electroluminescent layer.     

解剖激光告警

介绍了激光告警的作用,分析了激光告警器的原理、性能要求和分类,然后分别阐述了典型的光谱识别型、相干识别型和散射探测型激光告警器,并对不同类型的激光告警器进行了比较评价.     

80K高频无磁非金属脉冲管制冷机

介绍了高频脉冲管制冷机冷指无磁非金属材料的选择、加工以及实验优化工作.制作的高频无磁脉冲管制冷机冷指在风冷,2.3 MPa 充气压力,44 Hz,70 W 电功率输入条件下,最低达到 73.4 K 的无负荷最低温度;60 W 电功率输入,最低温度为 74.0 K,在 80 K 时可以提供 0.1 W 的制冷量.本文为高频脉冲管制冷机直接冷却相关低温超导器件提供了坚实的基础.     

Compact multimode interference coupler with tapered waveguide geometry

In this paper, a novel MMI coupler, based on general interference, with tapered waveguide geometry has been proposed for reduction of coupling length. The coupling characteristics and power imbalance of the proposed structure are compared with conventional MMI structures by using a mathematical model based on sinusoidal modes. It is seen that the beat length for tapered MMI coupler with angle of taper ∼1.05° is reduced by ∼24% of that of conventional MMI coupler and the coupling characteristics obtained with the mathematical model, match well with those obtained by more sophisticated BPM computer aided design software. The power imbalance for tapered 3 dB MMI coupler is more sensitive to the wavelength than that for conventional 3 dB MMI coupler and variation of power imbalance with fabrication tolerance for both the MMI coupler is almost same.