van Aarle, Casper; Krämer, Karl W; Dorenbos, Pieter (2023). Avoiding concentration quenching and self-absorption in Cs4EuX6 (X = Br, I) by Sm2+ doping. Journal of materials chemistry C, 11(6), pp. 2336-2344. Royal Society of Chemistry 10.1039/d2tc05311j
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The benefits of doping Cs4EuBr6 and Cs4EuI6 with Sm2+ are studied for near-infrared scintillator applications. It is shown that undoped Cs4EuI6 suffers from a high probability of self-absorption, which is almost completely absent in Cs4EuI6:2% Sm. Sm2+ doping is also used to gain insight in the migration rate of Eu2+ excitations in Cs4EuBr6 and Cs4EuI6, which shows that concentration quenching is weak, but still significant in the undoped compounds. Both self-absorption and concentration quenching are linked to the spectral overlap of the Eu2+ excitation and emission spectra which were studied between 10 K and 300 K. The scintillation characteristics of Cs4EuI6:2% Sm is compared to that of the undoped samples. An improvement of energy resolution from 11% to 7.5% is found upon doping Cs4EuI6 with 2% Sm and the scintillation decay time shortens from 4.8 s to 3.5 s in samples of around 3 mm in size.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
08 Faculty of Science > Department of Chemistry, Biochemistry and Pharmaceutical Sciences (DCBP) |
UniBE Contributor: |
Krämer, Karl |
Subjects: |
500 Science > 570 Life sciences; biology 500 Science > 540 Chemistry |
ISSN: |
2050-7526 |
Publisher: |
Royal Society of Chemistry |
Language: |
English |
Submitter: |
Pubmed Import |
Date Deposited: |
14 Feb 2023 11:27 |
Last Modified: |
15 Feb 2023 04:33 |
Publisher DOI: |
10.1039/d2tc05311j |
PubMed ID: |
36777479 |
BORIS DOI: |
10.48350/178747 |
URI: |
https://boris.unibe.ch/id/eprint/178747 |
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