Journal Article

PUBDB-2023-05314

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Zero‐Dimensional Gua$_3$SbCl$_6$ Crystals as Intrinsically Reabsorption‐Free Scintillators for Radiation Detection

Zaffalon, M.Extern* ; Wu, Y. ; Cova, F.Extern* ; Gironi, L. ; Li, X. (Corresponding author) ; Pinchetti, V. ; Liu, Y. ; Imran, M. ; Cemmi, A.INFN* ; Di Sarcina, I.Extern* ; Manna, L. (Corresponding author) ; Zeng, H. (Corresponding author) ; Brovelli, S. (Corresponding author)Extern*

2023
Wiley-VCH Weinheim

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Please use a persistent id in citations: doi:10.1002/adfm.202305564  doi:10.3204/PUBDB-2023-05314

Abstract: The search for efficient, re-absorption-free scintillators has recently focused the attention on antimony-based halides, which exhibit largely Stokes shifted luminescence due to radiative recombination of excitons self-trapped (STE) in strongly Jahn–Teller distorted Sb$^{3+}$ color centers. Here, the synthesis of a hybrid structure is reported with chemical formula (C$_{13}$H$_{14}$N$_3$)$_3$SbCl$_6$ consisting of spatially isolated [SbCl$_6$]$_3$− octahedra separated by organic N,N'-diphenylguanidinium (Gua) molecules. The optical properties of this material are mainly determined by the inorganic component and are characterized by a pronounced Stokes shift of ≈1.3 eV and a room-temperature photoluminescence (PL) efficiency of up to 85%. Remarkably, highly efficient radioluminescence (RL) is observed with scintillation light yields of ≈2000 ph MeV−1 using both soft X-rays and a 124 keV gamma source. Temperature-dependent PL and RL measurements confirm the minor role of non-radiative channels, which are completely suppressed below 100 K. Thermally stimulated luminescence measurements suggest that the traps in Gua$_3$SbCl$_6$ crystals have a significantly large energy depth distribution below the absorbing state.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)

Experiment(s):

1. PETRA Beamline P66 (PETRA III)

Appears in the scientific report 2023

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF >= 15 ; JCR ; SCOPUS ; Web of Science Core Collection

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