Rh6G/氧化多孔硅复合膜的荧光光谱  

The Fluorescence Spectra of Rh6G/Oxidized Porous Silicon Composite Films

作　　者：车永莉[1] 曹小龙[2] 李清山[3,4] 

机构地区：[1]曲阜师范大学信息技术与传播学院,山东日照276826 [2]曲阜师范大学计算机科学学院,山东日照276826 [3]曲阜师范大学物理工程学院,山东曲阜273165 [4]鲁东大学,山东烟台264025

出　　处：《发光学报》2009年第1期86-90,共5页Chinese Journal of Luminescence

摘　　要：为了发展性能良好的固体染料激光器,多孔介质中镶嵌激光染料是一种可行的途径。将氧化多孔硅作为基质材料,通过浸泡的方式将激光染料Rh6G嵌入其中,形成Rh6G/氧化多孔硅复合膜,对比研究了Rh6G在无水乙醇、多孔硅、多孔氧化硅中的荧光特性。结果表明,经高温氧化后,氧化多孔硅透明度提高,其荧光强度明显变弱,在复合膜中已检测不到其荧光行为。相比于在无水乙醇溶液中,在氧化多孔硅中Rh6G发射光谱的半峰全宽有所展宽,峰值波长略有红移,对称性大为提高,具有类似单体发光特性,这种现象与纳米孔对Rh6G的聚集程度的限制有关。In order to develop solid-state dye laser with high performance, it is a feasible way to embed dyes in porous medium. As a excellent porous medium, the oxidized porous silicon has a multivariate porous structure, a great specific surface area, and stable physics and chemistry property. Rhodamine 6G is a kind of laser material which has the widest gain bandwidth, always to be the first object when the ultrashort pulse laser technology was researched. In this paper, porous silicon samples were prepared by electrochemical anodic oxidization. After oxidization at high temperature, oxidized porous silicon samples were fabricated. Through the method of marinating, this research regarded oxidized porous silicon embedded by Rh6G as substrate, and formed Rh6G/ oxidized porous silicon composite films, then made a contrast research on fluorescence features of Rh6G in ethanol liquor, oxidized porous silicon and porous silicon. The samples of porous silicon and oxidized porous silicon were detected by fluorescence spectra. Investigation demonstrated that the PL peak of oxidized porous silicon has a blue shift, along with the obvious reduction of PL intensity, compared with that of porous silicon. It was also found that the transparency of oxidized porous silicon is increased after high temperature oxidation, and its luminescence can＇t be examined in composite films. So, the oxidized porous silicon is impossible to disturb the fluorescence spectra of Rh6G which had been embedded in pores. Compared with ethanol liquor, the spectral full width at half maximum of Rh6G in oxidized porous silicon is improved slightly, its peak wavelength has a little red shift, and its spectral symmetry is improved greatly. Similar to in ethanol liquor, Rh6G had the single molecule＇s luminescence in oxidized porous silicon. In the oxidized porous silicon, the Rh6G is subjected to a restriction of the nanopores, and exist mainly the form of single molecule. At the same time, it was possible that a small amount of dipolymer and muhipolymer of R

关 键 词：氧化多孔硅 阳极氧化 Rh6G 荧光光谱 

分 类 号：O482.31[理学—固体物理]