Luminescence properties of Ammonium Silicon Fluoride films prepared by vapour etching technique

Infrared absorption bands at 1060 cm− 1, 1113 cm− 1 and 1230 cm− 1 attain saturation with time. Agreement between the saturation time of SiOx longitudinal optic mode at 1230 cm− 1 and that deduced from PL measurements in literature is noted. It is shown that PL emissions are intrinsic in nature and have a significant excitonic contribution.