In this paper, efforts were made to develop silicon-based light sources capable to be integrated with present silicon electronic devices on a single chip. Nano-structure on gate oxide was proposed to enhance the efficiency of silicon electroluminescence (EL) from metal-oxide-silicon light emitting diode (MOS LED). External quantum efficiency as high as 2.1×10^(-6) was achieved on MOS LED with liquid-phase deposited (LPD) oxide, and efficiency as high as 1.0×10^(-5) was achieved on MOS LED with SiO2 nano-particles (8~11 nm in diameter)