Influences of gamma irradiation on structural, morphological and luminescence characteristics of Nb doped TiO2 nanophosphors
Yükleniyor...
Dosyalar
Tarih
2023
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The irradiation induced effects on structural, morphological and luminescence characteristics of Nb:TiO2 phosphors were systematically investigated. Possible defect centers present in the Nb:TiO2 phosphors were also characterized. Anatase phase of TiO2 with minor parasitic Nb-containing phases was specified in crystallographic structure of phosphors. Crystalline size and internal stress enhance with enhancing the exposed dose. The observed rise in the crystalline size was also confirmed in morphological evolution. Moreover, the Nb:TiO2 phosphor exhibits five different photoluminescence peaks. Intensity variations and blue-green-red shifts on the PL peaks were observed after irradiation exposures. Similarly, various trap sites/centers with depth energies between 1.09 eV and 1.99 eV were found in the thermoluminescence analysis. The irradiation exposures both enhance the oxygen vacancies and cation interstitial defects in the structure. The results have depicted that gamma exposure significantly affects the crystallographic and luminescence features of the Nb:TiO2 nanophosphors.
Açıklama
This work was supported by Giresun University Research Fund Project under the Project no. FEN-BAP-A-230218-40. The authors thank to Gazi University Photonics Application and Research Center, Cukurova University Physics Department, Research Center and Turkish Atomic Energy Authority for the technical support. Authors would like to thank Assoc. Prof. Dr. Sibel Akca-Ozalp for valuable supports on TL analysis.
Anahtar Kelimeler
Nb:TiO2 phosphors, XRD, Photoluminescence, Thermoluminescence, Trap Properties, Photonic
Kaynak
Nuclear Inst. and Methods in Physics Research, B
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
535
Sayı
Künye
Büyükuslu, H., Kutlu, N., & Kaya, S. (2023). Influences of gamma irradiation on structural, morphological and luminescence characteristics of Nb doped TiO2 nanophosphors. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 535, 234-240.
