熔融法制备PbSe量子点钠硼铝硅酸盐玻璃  

PbSe Quantum Dot-Doped Sodium-Aluminum-Borosilicate Glass Fabricated by a Melting Method

作　　者：程成[1] 江慧绿[1] 马德伟[1] 

机构地区：[1]浙江工业大学激光与光电子技术研究所,浙江杭州310023

出　　处：《光学学报》2011年第2期179-185,共7页Acta Optica Sinica

基　　金：国家自然科学基金(60777023);浙江省自然科学基金(Z407371)资助课题

摘　　要：量子点掺杂玻璃是当前新型光通信材料研究的一个热点。用熔融法成功制备了PbSe量子点钠硼铝硅酸盐玻璃。用X射线衍射仪和透射电镜分析了玻璃中PbSe量子点的结晶、尺寸以及分布情况,并用紫外可见近红外分光光度仪和荧光光谱仪分析了PbSe量子点玻璃的吸收谱和荧光发射谱。结果表明,当热处理温度低于500℃时,玻璃没有荧光辐射。当热处理温度高于550℃时,随着热处理温度的升高,PbSe量子点尺寸增大、分布密度变小。在1064 nm激光照射下,观测到玻璃有强荧光辐射,其辐射峰的半峰全宽为275~808 nm,峰值波长1676-2757 nm。峰值波长与量子点尺寸密切相关,辐射与吸收峰值波长之间的斯托克斯频移为20-110 nm。Abstract As a novel optical communication material, quantum dot （QD）-doped glass became one of the focal researches in recent years. PbSe QD-doped sodium-aluminum-borosilicate glass is fabricated successfully by the melting method. The crystallization, size and distribution of the PbSe QD in the glass are investigated by X-ray diffractometer and transmission electron microscopy. The absorption and photoluminescence （PL） spectra of the PbSe QD doped-glass are also observed by UV-visible-NIR spectrophotometer and fluorescence spectrometer, respectively. The obtained results suggest that, when heat treatment temperature T is lower than 500 ℃, there is no observed PL emission in glass under irradiation of 1064 nm laser. When treatenent temperature T〉550 ℃ , the glass appears strong PL emissions with full width at half maximum （FWHM） in the range of 275-808 nm, and the PL peak wavelengths in 1676-2757 nm region strongly depended on the QD size. The size of PbSe QD is positively correlated with the heat treatment temperature, a Stokes shift of between the absorption and PL peaks is 20-110 nm.

关 键 词：光纤材料 PbSe量子点玻璃 熔融法 荧光发射峰值强度 半峰全宽 

分 类 号：TN213[电子电信—物理电子学]