Abstract
The photoluminescence properties of BaZn1.06Al9.94O17:Mn4+ are investigated in this paper. The excitation spectrum of BaZn1.06Al9.94O17:Mn4+ shows three bands. The absorption band centered at 295 nm is attributed to the overlap of the Mn4+ → O2- charge transfer transition and the 4A2 → 4T1g transition of Mn4+ ion, the other weak bands centered at 399 and 450 nm are due to the 4A2 → 2T2 and 4A2 → 4T2 transition of Mn4+ ion. The emission spectrum shows emission peak at 665 nm, owing to the spin-forbidden transition 2E→4A2 of Mn4+ ions. With increasing Mn4+ ion concentration, the lifetime of the phosphor decreases from 1.050 to 0.950 ms. The chromaticity coordinates is (0.717, 0.283) which is a deep red emission. The emission of BaZn1.06Al9.94O17:Mn4+ contributes to plant growth and can be applied to plant illumination sources.
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