Control of photoluminescence properties of Si nanocrystals by simultaneously doping n- and p-type impurities

Fujii, Minoru; Yamaguchi, Yasuhiro; Takase, Yuji; Ninomiya, Keiichi; Hayashi, Shinji
August 2004
Applied Physics Letters;8/16/2004, Vol. 85 Issue 7, p1158
Academic Journal
The effects of B and P codoping on photoluminescence (PL) properties of Si nanocrystals (nc-Si) are studied systematically. It is shown that the PL intensity of codoped nc-Si is always higher than that of either P- or B-doped nc-Si. The intensity is sometimes even higher than that of pure nc-Si at relatively low P and B concentrations and low annealing temperatures. By doping P and B simultaneously to very high concentrations, the PL peak shifts below the band gap of bulk Si.


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