Investigation of structural, morphological and spectral characteristics of double perovskite Sr2GdTaO6 phosphors doped with Eu3+, and co-doped Eu3+, B3+ having improved quantum efficiency
Küçük Resim Yok
Tarih
2024
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The increasing boron effect significantly enhanced the luminescence and asymmetry of double perovskite phosphor. The structural, morphological and spectral characteristics of Sr2Gd1-xTaO6:xEu3+, (x = 0.5-20 mol%) and Sr2Gd1-xTaO6:xEu3+, yB3+ (x = 10 mol%, y = 0-100 mol%) phosphor series were examined in terms of Eu3+ increase and B3+ increase. In XRD results, Eu3+ doped Sr2GdTaO6 samples exhibited a single-phase up to 20 mol%, and slight impurity phase was formed at high concentration in Eu3+, B3+ co-doped Sr2GdTaO6 series. In SEM micrographs, there was no significant change in grain morphology of Eu3+ doped grains, whereas the flux effect of boron led to grain growth in Eu3+, B3+ co-doped samples. The optical band gap energy (Eg) varied in the range of 4.42-4.27 and 4.27-4.08 eV for Eu3+ doped and Eu3+, B3+ co-doped series, respectively. The maximum increases in emissions depending on Eu3+ and B3+ increase were 10 mol% for Sr2GdTaO6:Eu3+ and 50 mol% for Sr2GdTaO6:Eu3+, B3+, respectively. The increased B3+ concentration improved the electric dipole transition (5D0 -> 7F2), and the asymmetry ratio increased from 0.35 to 2.65. Judd-Ofelt (JO) parameters were calculated from the emission spectrum, in which the Omega 2 and Omega 4 parameters for Sr2GdTaO6:Eu3+ phosphors are close values, and both parameters increased in Sr2GdTaO6:Eu3+, B3+. The quantum efficiency of Sr2GdTaO6:Eu3+ phosphors ranged between 49.82 and 93.08%, and the eta QE values for Sr2GdTaO6:Eu3+, B3+ exceeded 100%.
Açıklama
Anahtar Kelimeler
Kaynak
Journal of Materials Science: Materials in Electronics
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
35
Sayı
34
Künye
Ilhan, M., & Guleryuz, L. F. (2024). Investigation of structural, morphological and spectral characteristics of double perovskite Sr2GdTaO6 phosphors doped with Eu3+, and co-doped Eu3+, B3+ having improved quantum efficiency. Journal of Materials Science. Materials in Electronics, 35(34), 2163.
