Electroluminescence in Metal-Oxide-Semiconductor Tunneling Diodes with Ultra Thin Silicon

Electroluminescence characteristics of a metal-oxide-semiconductor tunneling diode on a silicon-on-insulator wafer have been studied. The spectrum from the diode is peaked at 1050 nm (1.18 eV) and at 1145 nm (1.08 eV). The spectrum from the diode on a silicon wafer is peaked at 1145 nm. The peak at 1145 nm can be assigned as phonon-assisted indirect transitions. It is indicated that the peak at 1050 nm is due to the quantum confinement in an ultra thin silicon layer.