Methods to Make Silicon and Silica Luminescent
The development of adding optical functionality to a silicon microelectronic chip is still a great challenge in material research area. Silicon and its oxide are not luminescent for they do not possess direct electronic band transition. Here we demonstrate that room-temperature photoluminescence (PL) has been observed from silicon/silicon dioxide laser sintered body with its strongest PL intensity peak being at 387 nm (3.20 eV) and another peaked near 788 nm (1.60 eV). The effects of silicon/silicon oxide particle diameters and silicon contents on room-temperature PL of their laser co-sintering samples were studied. It was found that the PL peak intensity changes with the increasing silicon content.
Zhengyi Jiang, Jingtao Han and Xianghua Liu
L. Huo et al., "Methods to Make Silicon and Silica Luminescent", Advanced Materials Research, Vols. 152-153, pp. 1142-1145, 2011