van Aarle, Casper; Krämer, Karl W.; Dorenbos, Pieter (2022). Characterisation of Sm2+-doped CsYbBr3, CsYbI3 and YbCl2 for near-infrared scintillator application. Journal of luminescence, 251, p. 119209. Elsevier 10.1016/j.jlumin.2022.119209
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Fast energy transfer from Yb2+ to Sm2+ is a requirement when using Yb2+ as a sensitiser for Sm2+ emission for near-infrared scintillator applications. This cannot be achieved through dipole-dipole interactions due to the spin-forbidden nature of the involved Yb2+ transition, making the rate of energy transfer too slow for application. This work explores whether exploiting the exchange interaction by increasing the Yb2+ concentration to 99% is an effective way to increase the rate at which energy is transferred from Yb2+ to Sm2+. The scintillation characteristics of CsYbBr3:1%Sm, CsYbI3:1%Sm and YbCl2:1%Sm single crystals were studied through 137Cs excited pulse height spectra, X-ray excited decay and X-ray excited luminescence spectra. An energy resolution of 7% and a light yield of 30,000 ph/MeV was achieved with CsYbI3:1%Sm. Photoluminescence spectroscopy and decay studies were performed to study the band structure and relaxation dynamics.
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: |
0022-2313 |
Publisher: |
Elsevier |
Funders: |
[UNSPECIFIED] STW |
Language: |
English |
Submitter: |
Karl Krämer |
Date Deposited: |
26 Jan 2023 10:23 |
Last Modified: |
05 Feb 2023 02:24 |
Publisher DOI: |
10.1016/j.jlumin.2022.119209 |
BORIS DOI: |
10.48350/176995 |
URI: |
https://boris.unibe.ch/id/eprint/176995 |
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