Abstract

Red-, yellow-, and green-luminescent films have been formed by evaporation of powdered Zn₂SiO₄[Mn]. The yellow-emitting form was formed by firing the evaporated film plus additive in air at relatively low temperatures (750°C). The red form was produced on Vycor substrates at higher temperatures (1100°C). Infrared reflection studies and x-ray diffraction analyses of these films indicate that the red-emitting form is SiO₂[Mn] and that the yellow form is amorphous Zn₂SiO₄[Mn]. The luminescence of both of these phosphors is probably due to interstitial manganese ions. The strong chemical reaction between the luminescent film and the glass substrate is brought out.

© 1958 Optical Society of America

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