首页 | 本学科首页   官方微博 | 高级检索  
     检索      


The influence of low-temperature silver-ion exchange on the spectral-luminescent properties of fluorophosphate glasses doped with PbSe
Authors:E V Kolobkova  M S Kuznetsova  N V Nikonorov
Institution:1.ITMO University,St. Petersburg,Russia;2.St. Petersburg State Technological Institute (Technical University),St. Petersburg,Russia;3.St. Petersburg State University,St. Petersburg,Russia
Abstract:Changes in the absorption and luminescence spectra of fluorophosphate glasses doped with PbSe caused by low-temperature Ag+–Na+ ion exchange are considered. It is found that the silver distribution gradient in a near-surface layer about 16 μm thick leads to two different processes of interaction between metal and semiconductor nanoparticles. PbSe molecular clusters and quantum dots more efficiently grow in deep layers with a low silver concentration. The near-surface glass layers with a high silver concentration exhibit formation of Ag metal nanoparticles, on the surface of which interaction with PbSe molecular clusters leads to the formation of Ag–Se–Pb bonds, which transform into Ag2Se layers in the process of heat treatment. The appearance of the new phase is confirmed by X-ray diffraction.
Keywords:
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号