Electroluminescence from semitransparent Au film/nanometer $SiO2/nanometer$ Si/nanometer $SiO2/n+–Si$ structure under reverse bias Available to Purchase

Nanometer $SiO2/nanometer$ Si/nanometer $SiO2$ double-barrier (DB) structures, with Si layers having eleven different thicknesses from 2 to 4 nm, were deposited on $n+–Si$ substrates using the magnetron sputtering technique. Strong electroluminescence (EL) from semitransparent Au $film/DB/n+–Si$ structure was observed under reverse bias in a range of about 5–7 V. It is found that every EL spectrum of the structure can be decomposed into two Gaussian bands with peaks at around 1.85 and 2.25 eV, and their intensities and current swing synchronously with increasing nanometer Si layer thickness; the periodic length of swing is consistent with half of the de Broglie wavelength of the carriers. A comparison was carried out between EL from the $Au/DB/n+–Si$ structure under reverse bias and that from the $Au/DB/p–Si$ structure under forward bias reported previously.