Structural and luminescent properties of Eu-ion-doped CaHfO3

Soyeong Jang, Hyunseo Kim, S. W. Wi, Hyeontae Lim, J. S. Chung, Yoonseo Nah, Dong Ha Kim, Y. S. Lee

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Abstract

We investigated the structural and luminescent properties of Eu3+-doped CaHfO3, which was synthesized using the solid-state reaction method. The crystal structures of the samples were analyzed by applying the Rietveld refinement technique on their X-ray diffraction patterns. Because of cation vacancies and/or interstitial oxygens, the unit-cell volumes of the samples increased, and the local lattice distortions were alleviated when the Eu3+ concentration increased. For near-ultraviolet photoexcitation, the emission spectra of our samples showed a series of narrow bands, which were assigned to the energy transitions of 5D07FJ (J = 0, 1, 2, 3, and 4) in the Eu3+ ions. The luminescence behaviors of the samples were evaluated using Judd–Ofelt intensity parameters, which provided useful information regarding the local structure around the Eu3+ ions.

Original languageEnglish
Article number117490
JournalJournal of Luminescence
Volume226
DOIs
StatePublished - Oct 2020

Bibliographical note

Funding Information:
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea , funded by the Ministry of Science, ICT and Future Planning ( NRF-2018R1D1A1A02086130 ).

Publisher Copyright:
© 2020

Keywords

  • CaHfO
  • Eu
  • Judd–ofelt (JO) analysis
  • Red emission
  • Rietveld refinement

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