Nd：MgO：LiNbO3晶体的荧光光谱及其双晶体腔内互倍频实验

采用激光感生荧光技术测量了Ｎｄ：ＭｇＯ：ＬｉＮｂＯ３晶体的偏振荧光光谱，简要地说明了Ｎｄ：ＭｇＯ：ＬｉＮｂＯ３双晶体腔内互倍频的基本原理，并在实验中用染料激光作泵浦源实现了其双晶体腔内互倍频运转；得到５４３ｎｍ横模倍频绿光单端输出约ＹＭＷ，腔前泵浦阈值约３８ＭＷ，总转换效率约为１．３％。     

As压对LT-GaAs/AlGaAs多量子阱光学特性的影响

在衬底温度为 3 5 0°C的条件下 ,用分子束外延的方法 ,在不同的砷压条件下生长了 Ga As/Al0 .3Ga0 .7As多量子阱结构。 77K的荧光实验证明 ,砷压对样品的光学特性影响显著。认为砷压对低温多量子阱光学特性的影响是点缺陷随砷压的演化和能级间相互补偿的共同结果。通过优化砷压 ,样品的荧光峰的半峰宽减小到 3 me V,这是到目前为止所报道过的最窄的低温多量子阱的荧光峰。相应的垂直场光折变器件的电吸收为 60 0 0 cm     

Bright Blue Light—emitting Diodes Based on a Novel Fluorescent Dye Containing Heterocyclic Groups

Novel molecular material ,1-benzothiazoly-3-pheny1-pyrazoline (BTPP) was found to function as bright blue light emitting dye in organic electroluminescent device, and its optical and electric characteristics were investigated. This heterovyclic compound exhibited good characteristics of blue photoluminescence and electroluminescence,which had the emission peak at 450nm .The single layer light-emitting devices using BTPP as light -emitting material dispersed in poly(N-vinylcarbazole)(PVK) and double layer ones using PBD as hole block layer above the light-emitting layer were fabricated using conventional spin-casting and vaccum vapour deposition methods. The introduction of PBD has enhanced electron injection and luminance efficiency, compared with the single layer LEDs.     

硼酸使掺铁铝酸锂发光增强的现象

在硼酸存在下合成了掺铁铝酸锂荧光体,研究了在不同温度下硼酸加入量对荧光体发光强度的影响,并通过X射线粉末衍射和粒度分析,初步探讨了发光增加的原因。     

提高X荧光光谱分析仪的完好率

ARL-8480X射线荧光光谱分析仪自1994年9月安装投入生产以来，每年夏季均出现各种不同的故障，造成仪器不能正常开机运行，影响了生产及配矿工作的顺利进行。本文论述了通过优化分析条件，降低仪器的故障率，确保仪器安全运行。     

YAG：Ce Phosphors for WLED via Nano-Pesudoboehmite Sol-Gel Route

The sub-micron sized YAG ： Ce phosphors were synthesized via a modified sol-gel method by peptizing nano-pesudoboehmite particulate. It is found that YAG phase from the dried gel powders appears at 1000 ℃ then the pure YAG phase exists at a relatively lower sintering temperature of 1400 ℃. The smaller sizes of phosphors in the ranges of 1 - 3 μm are obtained due to the contribution of seeding effects of nano-sized alumina particles to strengthen each step of the processes. Both the excitation and emission spectra of photoluminescence of the phosphor obtained at 1400 ℃ meet well with the spectroscopic requirements of the WLED phosphors.     

夜光型荧光油墨在单透视广告上的应用

单透视车窗广告,在白天光线好时容易看到广告画面,但是当夜色降临大地的时候,就什么也看不见了。若是要想在夜里随时能看到车窗广告,解决的方法只有一个,那就是采用夜光型荧光油墨。 夜光油墨是采用长余辉稀土发光材料,通过高科技手段制成的。在白天吸收太阳光10-30min,便自动持续发光10h以上,所以到深更半夜仍旧发光,特别是当车行驰在黑暗中,     

VFD GU384x32L-3900模块特性及应用

GU384x32L-3900是一款内藏驱动电路的、384×32点阵式VFD显示模块。介绍了GU384x32L-3900模块的基本结构及软件编程、硬件应用等特性并探讨了其在实际中的应用。