论文信息 - Photoluminescence investigation of porous anodic alumina with spin-on europium-containing titania sol–gel films

Photoluminescence investigation of porous anodic alumina with spin-on europium-containing titania sol–gel films

Abstract In this work, we investigate europium-containing sol–gel derived films fabricated onto porous anodic alumina (PAA) of thickness ranging from 0.5 to 5 μm. The sols were prepared from Ti(OC 2 H 5 ) 4 precursor mixed with aqueous-alcohol solution of europium nitrate and deposited onto PAA. The concentration of europium oxide in xerogel was 40 wt.%. The PL spectra exhibit bands typical for Eu 3+ corresponding to 5 D 0 → 7 F j ( j =1–4) electron transitions with the maximum at 617 nm ( 5 D 0 → 7 F 2 ). The PL intensity of all the bands increases with the thickness of PAA. The samples exhibit a red light emission visible to the naked eye within the investigated temperature range from 10 to 300 K.

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