(Zn,Cd)S:Mn,Cu薄膜の製作と特性

概要

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Luminescence properties under uv light and dc field excitation are reported. X-ray diffraction patterns and emission spectra were studied. The solid solutions of thin films with nearly the same composition as source material were obtained, when evaporated at 800°C or 1000°C. Emission spectra depended on the surface of the film, the glass substrate side or the opposite side, on which uv light was irradiated, especially in the samples fired in air after deposition. The samples with latent luminescence centres due to Mn ions, at least, at the side of glass substrate were obtained by the following method ; powder sample with the amount of added Mn ions of 10×10<SUP>-2</SUP> g ·atom/mole host crystal was evaporated at 1000°C, and then the deposited samples on glass substrates were fired at 600°C in air or at 700°C in Ar gas flow. However, effective field could not be applied to the sample fired at above 600°C. The sample fired at 500°C in air was two times higher in its emission intensity under simultaneous excitation of uv light and dc field than under excitation of uv light. The above sample also showed EL under excitation of ac field.
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