“…The former is based on the radiative recombination of quantum-confined electron-hole pairs across the wider band gap of silicon nano-particles. 1,[13][14][15][16] The latter claims various wide-gap surface species such as hydrogenated silicon, 2,[18][19][20] siloexene compounds, 3) silanone-based silicon oxyhydride, 21) and non-bridging oxygen hole center. 22,23) Furthermore, the local energy state at the silicon/SiO 2 interface [24][25][26] or at the silicon/SiO x interface 27,28) can lead to the blue PL of PS obtained through RTO.…”