Striking Change in Radiative Lifetime and Asymmetry Ratio with Temperature for the Double Perovskite Cs2NaEuCl6
Access Status
Open access
Authors
Xiao, D.
Kai, H.Y.
Jia, Guohua
Wong, K.L.
Tanner, P.A.
Date
2024Type
Journal Article
Metadata
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Xiao, D. and Kai, H.Y. and Jia, G. and Wong, K.L. and Tanner, P.A. 2024. Striking Change in Radiative Lifetime and Asymmetry Ratio with Temperature for the Double Perovskite Cs2NaEuCl6. Advanced Optical Materials. 12 (10).
Source Title
Advanced Optical Materials
Faculty
Faculty of Science and Engineering
School
School of Molecular and Life Sciences (MLS)
Funding and Sponsorship
Collection
Abstract
The measurement of quantum yield (QY) is an important process for a phosphor. This is often accomplished by the comparison of the low-temperature lifetime with the room temperature (RT) lifetime. It is shown that this procedure provides a considerable underestimation of QY in certain cases. Additionally, the use of the europium ion as an indicator of changes in site symmetry with temperature has severe limitations. This work reveals that a decrease in measured lifetime with increasing temperature of a system cannot always be associated with a descent in site symmetry and may be due to increasing radiative rate.
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