Print Email Facebook Twitter Characterisation of Sm2+-doped CsYbBr3, CsYbI3 and YbCl2 for near-infrared scintillator application Title Characterisation of Sm2+-doped CsYbBr3, CsYbI3 and YbCl2 for near-infrared scintillator application Author van Aarle, C. (TU Delft RST/Luminescence Materials) Krämer, Karl W. (University of Bern) Dorenbos, P. (TU Delft RST/Luminescence Materials) Date 2022 Abstract 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. Subject Divalent samariumDivalent ytterbiumEnergy transferNear-infrared scintillatorSingle crystal To reference this document use: http://resolver.tudelft.nl/uuid:cf28a6f2-2bf4-4cde-973f-f91d438fd73d DOI https://doi.org/10.1016/j.jlumin.2022.119209 ISSN 0022-2313 Source Journal of Luminescence, 251 Part of collection Institutional Repository Document type journal article Rights © 2022 C. van Aarle, Karl W. Krämer, P. Dorenbos Files PDF 1_s2.0_S0022231322004847_main.pdf 1 MB Close viewer /islandora/object/uuid:cf28a6f2-2bf4-4cde-973f-f91d438fd73d/datastream/OBJ/view