Abstract
A new system of blue‐luminescing, copper‐activated aluminosilicate phosphors, corresponding to the general formula , is reported. These phosphors can be synthesized from any combination of Group I A and Group II metals, and they can tolerate a wide variation in the quantities of all the oxide components, including the copper activator.Excitation and emission spectra are included for several typical phosphors, showing the relatively slight effects of variation in composition. The major excitation peak is in the neighborhood of 2600 Å. The emission spectra resemble that of , although the luminescence is slightly “whiter” and only one third as bright. The luminescence efficiency of these phosphors is nearly independent of temperature up to 150°C, and at 115°C their brightness is equal to that of .
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