Optical properties of PbSe and PbS quantum dots embedded in oxide glass

被引：1
|
作者：
Dantas, NO [1 ]
Silva, RS [1 ]
Qu, FY [1 ]
机构：
[1] Univ Fed Uberlandia, Fac Fis, Lab Novos Mat Isolantes & Semicond, BR-38400902 Uberlandia, MG, Brazil
来源：
PHYSICA STATUS SOLIDI B-BASIC RESEARCH | 2002年 / 232卷 / 01期
关键词：
D O I：
10.1002/1521-3951(200207)232:1<177::AID-PSSB177>3.0.CO;2-A
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
PbSe and PbS quantum dots (QDs) embedded in the oxide glass matrixes (SiO2-Na2CO3-ZnO-A(2)O(3)-PbO2-B2O3) were synthesized by means of fusion method. Their optical properties have been studied both theoretically and experimentally. We found that the optical absorption is strongly dependent upon thermal-treatment processes, for instance annealing temperature and time. An increase of the annealing time leads to a red shift of the optical features at the higher energy side, suggesting an increase of QD-size. An up-conversion photoluminescence emission band at about 2.476 eV was observed in the PbS QDs. It is attributed to a resonant Raman process.
引用
收藏
页码：177 / 181
页数：5
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