Photoluminescence study of KMgSO4F:X (X=Cu+ or Dy3+ or Eu3+) halosulfate phosphor

- New phosphors Cu, Dy and Eu doped KMgSO4F have been investigated.
- KMgSO4F has been studied for its PL characteristics.
- The trivalent europium ion is useful for studying the nature of metal coordination in various systems.
- The results present monovalent Cu and trivalent Dy and Eu emission in new KMgSO4F sulfate host by wet chemical method.

Photoluminescence (PL) from Cu+, Dy3+and Eu3+ doped KMgSO4F halosulfate fluoride phosphors have been investigated and synthesized by the wet chemical method. Strong emission of KMgSO4F: Cu+ phosphor is assigned to electronic transition 3d94s1→3d10. Emission bands peaking at 442 nm and 462 nm in the green region of the spectrum. Dy3+ emission is observed at 484 and 576 nm in KMgSO4F host due to 4F9/2→6H15/2 and 4F9/2→6H13/2 transitions respectively. The emission has a yellow-orange color in KMgSO4F host lattice The presence of trivalent Eu in KMgSO4F suggest the presence of Eu3+ in the host compound occupying two different lattice sites which is peaking at 593 and 616 nm showing 5D0→7F1 and 5D0→7F2 transitions respectively. The trivalent europium ion is very useful for studying the nature of metal coordination in various systems owing to its non-degenerate emitting 5D0 state. The paper discusses the photoluminescence of Cu+, Dy3+and Eu3+ in KMgSO4F matrix by a simple method.