B+, C+, Si+, and As+ with dose of 5 x 10(16) cm(-2) were implanted int
o SiNxOy films grown on crystalline silicon by plasma-enhanced chemica
l vapor deposition. The ion-implanted samples exhibit their photolumin
escence with different intensities and different peak wavelengths afte
r thermal annealing. Especially, the C--implanted SiNxOy films show ve
ry intense photoluminescence ar green-yellow color region.