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Effect of Sr on the luminescence properties of Eu 3+ activated xZnO-(1-x) SrO-Al 2 O 3 phosphors by Revupriya, ; Anjana, P S; Gopakumar, N; Anju, M S is a Materials Science article available to read on EtoBox.

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## Abstract Europium-doped xZnO-SrO-Al~2~O~3~ (x = 0, 0.2, 0.4, 0.5, 0.6, 0.8, 1) phosphors were synthesized by the traditional Solid-State Reaction (SSR) method. The structure of the phosphors prepared was analysed with the x-ray diffraction technique. The xZnO-(1-x) SrO-Al~2~O~3~:Eu^3+^ (0.1 mol%) (x = 0, 0.2, 0.4, 0.5, 0.6, 0.8, 1) exhibits varying PL intensity and is maximum for 0.8ZnO-0.2SrO-Al~2~O~3~: Eu^3+^ (0.4 mol%) and hence treated as the most prominent phosphor among these combinations. In the photoluminescence spectrum of the phosphors prepared, a sequence of emission bands were visible at various wavelengths viz., 576, 586, 602, 620, 656 and 702 nm as a result of the transitions of Eu^3+^ ions [^5^D0 - ^7^Fj where (j = 0–4)] and an excitation spectrum at 620 nm. An efficient orange-red phosphor thus developed capable of yielding a quantum efficiency of about 12%. Studies revealed that the commercially available red phosphors having an efficiency of only 9.6% (λex = 394 nm) & 4.2% (λex = 395 nm). Hence the current sample could be an ideal alternative for an efficient phosphor near UV LEDs. The mechanoluminescence of the 0.8ZnO-0.2SrO-Al~2~O~3~: Eu^3+^ (0.4 mol%) phosp

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Author

Revupriya, ; Anjana, P S; Gopakumar, N; Anju, M S

Publisher

IOP Publishing; IOP Publishing Ltd. (ISSN 2053-1591)

Published

2020

Language

EN

Field

Materials Science (Physical Sciences)