Striking Change in Radiative Lifetime and Asymmetry Ratio with Temperature for the Double Perovskite Cs2NaEuCl6

Daiwen Xiao; Hei-Yui Kai; Guohua Jia; Ka-Leung Wong; Peter A. Tanner

doi:10.1002/adom.202302261

Striking Change in Radiative Lifetime and Asymmetry Ratio with Temperature for the Double Perovskite Cs₂NaEuCl₆

Daiwen Xiao
, Hei-Yui Kai
, Guohua Jia
, Ka-Leung Wong^*
, Peter A. Tanner^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

9 Citations (Scopus)

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. © 2023 The Authors. Advanced Optical Materials published by Wiley-VCH GmbH.

Original language	English
Article number	2302261
Number of pages	6
Journal	Advanced Optical Materials
Volume	12
Issue number	10
Online published	23 Nov 2023
DOIs	https://doi.org/10.1002/adom.202302261
Publication status	Published - 4 Apr 2024
Externally published	Yes

Funding

G.J. acknowledges the financial support from the Australian Research Council (ARC) through Future Fellowship Scheme (FT210100509) and Discovery Project Scheme (DP220101959). K.-L.W. thanks the financial assistance from the Hong Kong Research Grants Council No. 12300021, NSFC/RGC Joint Research Scheme (N_HKBU209/21), and the Centre for Medical Engineering of Molecular and Biological Probes (AoE/M 401/20).

Research Keywords

double perovskite
europium
negative thermal quenching
quantum yield
radiative lifetime

Publisher's Copyright Statement

This full text is made available under CC-BY-NC-ND 4.0. https://creativecommons.org/licenses/by-nc-nd/4.0/

RGC Funding Information

RGC-funded

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10.1002/adom.202302261

422785300.pdfFinal Published version, 869 KBLicence: CC BY-NC-ND

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title = "Striking Change in Radiative Lifetime and Asymmetry Ratio with Temperature for the Double Perovskite Cs2NaEuCl6",

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. {\textcopyright} 2023 The Authors. Advanced Optical Materials published by Wiley-VCH GmbH.",

keywords = "double perovskite, europium, negative thermal quenching, quantum yield, radiative lifetime",

author = "Daiwen Xiao and Hei-Yui Kai and Guohua Jia and Ka-Leung Wong and Tanner, \{Peter A.\}",

year = "2024",

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doi = "10.1002/adom.202302261",

language = "English",

volume = "12",

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T1 - Striking Change in Radiative Lifetime and Asymmetry Ratio with Temperature for the Double Perovskite Cs2NaEuCl6

AU - Xiao, Daiwen

AU - Kai, Hei-Yui

AU - Jia, Guohua

AU - Wong, Ka-Leung

AU - Tanner, Peter A.

PY - 2024/4/4

Y1 - 2024/4/4

N2 - 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. © 2023 The Authors. Advanced Optical Materials published by Wiley-VCH GmbH.

AB - 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. © 2023 The Authors. Advanced Optical Materials published by Wiley-VCH GmbH.

KW - double perovskite

KW - europium

KW - negative thermal quenching

KW - quantum yield

KW - radiative lifetime

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U2 - 10.1002/adom.202302261

DO - 10.1002/adom.202302261

M3 - RGC 21 - Publication in refereed journal

SN - 2195-1071

VL - 12

JO - Advanced Optical Materials

JF - Advanced Optical Materials

IS - 10

M1 - 2302261

ER -

Striking Change in Radiative Lifetime and Asymmetry Ratio with Temperature for the Double Perovskite Cs₂NaEuCl₆

Abstract

Funding

Research Keywords

Publisher's Copyright Statement

RGC Funding Information

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Correction to “Striking Change in Radiative Lifetime and Asymmetry Ratio with Temperature for the Double Perovskite Cs₂ NaEuCl₆”

Cite this

Striking Change in Radiative Lifetime and Asymmetry Ratio with Temperature for the Double Perovskite Cs2NaEuCl6

Abstract

Funding

Research Keywords

Publisher's Copyright Statement

RGC Funding Information

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Research output

Correction to “Striking Change in Radiative Lifetime and Asymmetry Ratio with Temperature for the Double Perovskite Cs2 NaEuCl6”

Cite this

Striking Change in Radiative Lifetime and Asymmetry Ratio with Temperature for the Double Perovskite Cs₂NaEuCl₆

Correction to “Striking Change in Radiative Lifetime and Asymmetry Ratio with Temperature for the Double Perovskite Cs₂ NaEuCl₆”