Strong and stable visible luminescence from Au-passivated porous silicon
Journal
Applied Physics Letters
Journal Volume
75
Journal Issue
17
Pages
2560-2562
Date Issued
1999
Author(s)
Chen, C.H.
Abstract
We report on porous silicon (PS) samples with strong and stable red photoluminescence (PL) prepared by chemical anodization of gold-plated substrate. We demonstrate that the structural stability of Au-passivated porous silicon is much better than that of normal PS. It is also found that the PL intensity of Au-passivated PS can be enhanced by a factor of 3 when prepared under the same condition as that for normal PS. The infrared absorption spectra reveal that the photoluminescence stability can be attributed to the formation of stable Au-Si bonds on the surface of porous silicon. In addition, our study provides further evidence to support the quantum confinement model of the red emission of porous silicon. © 1999 American Institute of Physics.
Type
journal article