Effects of Sintering Temperature on the Morphology and Photoluminescence of Eu³⁺ Doped Zinc Molybdenum Oxide Hydrate

Figure 5

PL spectra of the precursors after thermal annealing at 200°C (a), 400°C (b), 600°C (c), and 800°C (d). The luminescent materials in (a) are the Eu³⁺ doped Zn₅Mo₂O₁₁·5H₂O whilst those in (b–d) are Eu³⁺ doped ZnMoO₄ compounds. Inset: a zoom in the region 585–630 nm to show the split emissions of transitions ⁵D₀  →  ⁷F₁ and ⁵D₀  →  ⁷F₂.

(a)

(b)

(c)

(d)