Abstract
Superlattices based on wide-bandgap hydrogenated amorphous silicon based alloys were studied in terms of optical absorption and photo-luminescence properties. A critical comparison between a-Si1−x N x : H/a-Si3N4: H and a-Si1−x C x : H/a-SiC: H multilayers was made, revealing the former as a promising structure for electroluminescent devices in the visible range. As evidence of this potentiality, a light-emitting device was realized using an a-Si1−x N x : H/a-Si3N4: H multilayer as the radiative element.