Abstract
Single emission bands of ‐type phosphors are represented as Gaussian curves and critically examined. The width (at half maximum amplitude) of the emission bands of almost all and phosphors activated by Cu or Ag and containing various coactivators is 0.36 ev. The colors of single emission bands, and of superpositions of the two main bands in case of copper activation, are represented in color diagrams. A red shift of the green copper emission band of phosphors with increasing high concentrations of activator and coactivator, as reported by Froelich for , Al, has also been observed in phosphors and with many different coactivators.
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