photoluminescence (PL) at 1.55 μm from
semiconducting β-FeSi2 has attracted a noticeable interest,
and has attracted much attention over the past ten years as one
of the promising materials for silicon-based optoelectronic
applications [1]. It is able to epitaxially grow on Si substrates
[2]. Light-emitting diodes using β-FeSi2 active-layer showed
the emission efficiency of about 0.1% [3]. It is pointed out that
non-radiative recombination centers at hetero-interfaces affect
the light emission efficiency.
In this study, we report an improvement in the crystallinity of
β-FeSi2 film as well as β-FeSi2/Si hetero-interface and the
enhancement of PL intensities by coating Cu or Au layer on
Si(100) wafers using metal-organic chemical vapor deposition
(MOCVD).