In:
Luminescence, Wiley, Vol. 37, No. 8 ( 2022-08), p. 1404-1410
Kurzfassung:
The preparation and characteristic of nanorod‐like Zn 2 GeO 4 doped with Eu 3+ or zinc germanate (ZGO):xEu 3+ (x = 0 ÷ 0.05), which was synthesized using the hydrothermal method, are described. The influence of Eu 3+ ‐doping ions on the structure and the optical properties of ZGO was also investigated. According to the photoluminescence spectra, ZGO:xEu 3+ nanophosphors gave a red emission due to the 5 D 0 → 7 F 2 emission of Eu 3+ ions. In accordance with Judd–Ofelt theory, the intensity parameters for f–f transitions from the emission and absorption spectrum were determined. At the 5 D 0 excited state of Eu 3+ , total spontaneous emission probabilities ( A R ), lifetimes ( τ R ), branching ratios ( β R ), and quantum efficiency ( η ) were calculated. The ZGO:xEu 3+ (x = 0.02, 0.03, 0.04) phosphor showed the branch ratio β ( 5 D 0 → 7 F 2 ) 〉 60%, indicating that the phosphors prepared here have a promising potential as laser light. The sample with a concentration of 0.04Eu 3+ achieved the highest quantum efficiency of 84%, suggesting that it has potential light‐emitting diode applications.
Materialart:
Online-Ressource
ISSN:
1522-7235
,
1522-7243
Sprache:
Englisch
Verlag:
Wiley
Publikationsdatum:
2022
ZDB Id:
2001819-8
SSG:
12