Investigation of Nd3+:Y2Si2O7Phosphors Using Photoluminescence and Positron Annihilation Lifetime Spectroscopy

Leyla Nur Akay, Saygin Kuzeci, Necmettin Akti, Murat Erdem, Cumali Tav, Ugur Yahsi, Gonul Eryurek, Baldassare Di Bartolo

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Neodymium-doped Y2Si2O7 nanopowders were synthesized by sol-gel and annealed under varying annealing temperature conditions. The phase transformation of Y2Si2O7 and the crystalline size change were observed with annealing temperature. Photoluminescence and the decay patterns of the 4F3/2→ 4I9/2,4I11/2, and 4I13/2 transitions were examined to reveal the spectroscopic characteristics of the powders. The spectral outputs of Nd3+:Y2Si2O7 phosphors remain strongly connected to the phase properties of Y2Si2O7. The positron lifetimes (τ 2, τ 3, and τ 4) and intensities (I 2, I 3, and I 4) obtained by positron annihilation lifetime spectroscopy were discussed for neodymium-doped Y2Si2O7 phosphors to relate the structural and boundary changes in terms of the phases and molar contents of the Nd3+ ions. The τ 2 and I 2 components were related to the structural open space in the grain, the τ 3 and I 3 components were correlated with vacancy-like defects in the grain boundaries, and the τ 4 and I 4 components were associated with vacancy defects in the grain, together with the effect of the increasing content of the Nd3+ ions.

Orijinal dilİngilizce
Makale numarası086005
DergiECS Journal of Solid State Science and Technology
Basın numarası8
Yayın durumuYayınlandı - Ağu 2023

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Publisher Copyright:
© 2023 The Electrochemical Society ("ECS"). Published on behalf of ECS by IOP Publishing Limited.


This work has been supported by the Scientific Research Projects Committee of Marmara University under Grants FEN-C-YLP-250416–0189 and FEN-A-200716–0376.

FinansörlerFinansör numarası
Marmara ÜniversitesiFEN-C-YLP-250416–0189, FEN-A-200716–0376

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