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Violet‐blue emission property of the cerium‐ion doped CaHfO 3 : Doping and temperature dependence
Author(s) -
Lee Seungmin,
Lim Junhwi,
Lee Y. S.
Publication year - 2018
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.3543
Subject(s) - photoluminescence , doping , ion , cerium , materials science , photoexcitation , analytical chemistry (journal) , emission spectrum , emission intensity , spectral line , chemistry , atomic physics , optoelectronics , excited state , physics , astronomy , metallurgy , organic chemistry , chromatography
We investigated the emission property of perovskite CaHfO 3 polycrystals with various concentrations of cerium ion (Ce 3+ ). With a wide range of UV photoexcitation, we observed a strong emission near 430 nm which should originate from 5d‐4f transitions in the Ce 3+ ions. Combining these emission spectra with the photoluminescence excitation spectra, we estimated the Stokes shift to be 6700 cm −1 , irrespective of the Ce 3+ ion doping concentration. We found that the violet‐blue emissions in Ce 3+ ions showed non‐trivial temperature dependence in their peak position and intensity. We found interesting low‐temperature behavior of the violet‐blue emission, which might be attributed to the thermal lattice effect in CaHfO 3 . We also discussed our results with those of the similar materials, perovskite zirconates. Our systematic studies provide useful information on the host material CaHfO 3 for a future study on the violet‐blue emission of Ce 3+ ions.