Photoluminescence Analysis of Electron Damage for Minority Carrier Diffusion Length in GaInP/GaAs/Ge Triple-Junction Solar Cells

Photoluminescence(PL) measurements are carried out to investigate the degradation of GaInP top cell and GaAs middle cell for GaInP/GaAs/Ge triple-junction solar cells irradiated with 1.0, 1.8 and 11.5 MeV electrons with fluences ranging up to 3 × 10~(15), 1 × 10~(15) and 3 × 10~(14) cm-2, respectively. The degradation rates of PL intensity increase with the electron fluence and energy. Furthermore, the damage coefficient of minority carrier diffusion length is estimated by the PL radiative efficiency. The damage coefficient increases with the electron energy. The relation of damage coefficient to electron energy is discussed with the non-ionizing energy loss(NIEL), which shows a quadratic dependence between damage coefficient and NIEL.     

DMS启用双精度寄存器统计N0．7信令话务量的必要性

介绍了天津本地电信No．7信令网及No．7信令网网管系统的结构,针对该网管系统在话务量统计中出现有误差的问题,介绍了操作测量的概念及相关的问题,并通过操作测量的试验找出了统计误差来自于单精度寄存器,指出了在DMS系统中合理地使用双精度寄存器的必要性。     

显色剂2,5-二甲氧基-4-氯苯基重氮氨基偶氮苯的合成及其与镉显色反应的研究

合成了显色剂2,5-二甲氧基-4-氯苯基重氮氨基偶氮苯(DMCDAA),并用元素分析和红外光谱分析证明其分子组成与结构。研究了该试剂与镉(Ⅱ)的显色反应条件。结果表明,在 pH 11．5的硼砂-氢氧化钠缓冲溶液中,表面活性剂Triton X-100存在下,DMCDAA与镉(Ⅱ)形成稳定的组成比为2:1的络合物,λmax=526 nm,ε526=2．1×105L·mol-1·cm-1。镉(Ⅱ)含量在 0-20μg/25 mL内符合比耳定律,回归系数为0．999 6。将方法用于铝合金中镉(Ⅱ)的测定,结果的RSD均小于2．5％,回收率在104％-106％之间。     

DMS100交换局局间No.7信令的传递方式及其要求

介绍了在本地电话网局间中继电路中运行Ｎｏ ．７ 信令采取的传送方式和遵循的原则。