Luminescence from amorphous silicon nanostructures

被引:67
作者
Estes, MJ
Moddel, G
机构
[1] UNIV COLORADO,DEPT ELECT & COMP ENGN,BOULDER,CO 80309
[2] UNIV COLORADO,CTR OPTOELECT COMP SYST,BOULDER,CO 80309
来源
PHYSICAL REVIEW B | 1996年 / 54卷 / 20期
关键词
D O I
10.1103/PhysRevB.54.14633
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We present a model of size-dependent luminescence from a-Si:H and show that a blueshift of the luminescence energy and a general increase in luminescence quantum efficiency are predicted as structure size decreases. In contrast to bulk a-Si:H structures, highly confined a-Si:H exhibits visible luminescence peak energies and high radiative quantum efficiency at room temperature, which is insensitive to changes in temperature or defect density. We also predict a decrease in mobility and radiative decay time as structure size shrinks. We compare our results with observations of visible light emission from porous silicon.
引用
收藏
页码:14633 / 14642
页数:10
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