W. Skorupa et al., A STUDY OF THE BLUE PHOTOLUMINESCENCE EMISSION FROM THERMALLY-GROWN, SI-IMPLANTED SIO2-FILMS AFTER SHORT-TIME ANNEALING(), Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 120(1-4), 1996, pp. 106-109
Thermal SiO2 films have been implanted with Si+ ions using double-ener
gy implants (200 + 100 keV) at a substrate temperature of about -20 de
grees C to total doses in the range 1.6 x 10(16)-1.6 x 10(17) cm(-2) f
ollowed by short-time thermal processing, in order to form a Si nanost
ructure capable of yielding blue photoluminescence (PL). The intensity
and the peak position of the PL band have been investigated as a func
tion of ion dose, manner of heat treatment, anneal time and anneal tem
perature. For the formation of blue PL emitting centres, optimum proce
ssing conditions in terms of excess Si concentration and overall therm
al budget are mandatory. The nature of the observed blue emission is d
iscussed.