The Relation of Thin Film Electroluminescence and Photoluminescence Excitation Spectra
The optical excitation spectra of many materials which have been used in thin film electroluminescence (TFEL) have been measured. It is found that for more efficient TFEL materials they always have some impurity excitation peaks in the long wavelength side. This can be used to select the new material for TFEL. The Mn, Tb have very different behavior in ZnS and CaS TFEL; it can be explained by the lattice symmetry.
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