| Abstract: | Intensive blue photoluminescence (PL) was observed at room
temperature from the nanocrystalline-Si/SiO$_{2}$ (nc-Si/SiO$_{2})$
multilayers (MLs) obtained by thermal annealing of
SiO/SiO$_{2}$\,MLs for the first time. By controlling the size of
nc-Si formed in SiO sublayer from 3.5 to 1.5 nm, the PL peak
blueshifts from 457 to 411 nm. Combining the analysis of TEM, Raman
and absorption measurement, this paper attributes the blue PL to
multiple luminescent centres at the interface of nc-Si and
SiO$_{2}$. |
