Green electroluminescence in crystals of ZnS0.6Se0.4

Abstract
Green‐light‐emitting devices with electrode areas of 1 mm2 have been prepared on crystals of a solid solution of zinc sulfide and selenide with the composition ZnS0.6Se0.4. A luminance of 200 fL was achieved at a bias of 11 V which corresponds to a power efficiency of 0.06%. The emission at room temperature was contained in a braod band with a maximum at 5450 Å (2.27 eV). Preliminary trials with a crystal of zinc sulfide produced a blue (4800 Å, 2.58 eV) emission with a luminance of 90 fL from an area of 1 mm2 for a power dissipation of 600 mW at a bias of 20 V.

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