Electroluminescence from B- and P-doped silicon nanoclusters
The ability of different impurities to enhance the electroluminescence (EL) of Si nanoclusters (nc-Si) in SiO2 has been investigated. Doped nc-Si films were fabricated by implantation of Si+, P+ and/or B+ into thermal SiO2 and subsequent heat treatment. The photoluminescence and EL of differently doped nc-Si produced by annealing at 1100 and 1000C were compared. It was found that EL related to impact excitation by hot electrons and its improvement is caused by reducing of phase separation temperature for doped nc-Si films.
doping si nanoclusters nc-si luminescence