2.0 μm electroluminescence from Si/ Si0.2 Ge0.8 type II heterojunctions
Journal
Journal of Applied Physics
Journal Volume
103
Journal Issue
1
Date Issued
2008
Author(s)
Abstract
A metal-oxide-semiconductor tunneling diode is used to emit electroluminescence from a Si/Si0.2Ge0.8 heterojunction. Besides the 1.1 μm and 1.6 μm infrared emission from the band edges of Si and SiGe, respectively, 2 μm infrared emission is also observed due to the radiative recombination between the electrons in the Si conduction band and the holes in the SiGe valence band. This type II recombination can emit photons whose energy is below the SiGe band gap to extend the emission range of Si/Ge-based light-emitting devices. The emission line shape can be fitted by the electron-hole-plasma recombination model.
SDGs
Type
journal article