an optoelectronic material , device applications , and methods for manufacturing the optoelectronic material are provided to make it possible to obtain stable characteristics without deterioration of luminescence over time in the atmosphere . the optoelectronic material is composed of a porous silicon the surface of which is nitrided to form a silicon nitride layer thereon . this allows a stable electroluminescence to be obtained , without oxidation of the surface of the porous silicon .