Zero‐Dimensional Gua3SbCl6 Crystals as Intrinsically Reabsorption‐Free Scintillators for Radiation Detection
Source abstract
Abstract
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 Sb3+ color centers. Here, the synthesis of a hybrid structure is reported with chemical formula (C13H14N3)3SbCl6 consisting of spatially isolated [SbCl6]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 Gua3SbCl6 crystals have a significantly large energy depth distribution below the absorbing state.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Perovskite Materials and Applications · Luminescence Properties of Advanced Materials · Radiation Detection and Scintillator Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Dipartimento di Scienza dei Materiali Università degli Studi Milano Bicocca Via R. Cozzi 55 IT‐20125 Milano Italy
MIIT Key Laboratory of Advanced Display Materials and Devices Institute of Optoelectronics & Nanomaterials School of Materials Science and Engineering Nanjing University of Science and Technology Nanjing 210094 China
Istituto Italiano di Tecnologia Via Morego 30 IT‐16163 Genova Italy
Dipartimento di Fisica Università degli Studi Milano Bicocca Piazza della Scienza 3 IT‐20126 Milano Italy
INFN Sezione Milano – Bicocca Piazza della Scienza 3 Milano IT‐20126 Italy
CINBIO Universidade de Vigo Materials Chemistry and Physics Group Department of Physical Chemistry Campus Universitario Lagoas Marcosende Vigo 36310 Spain
Department of Electrical and Computer Engineering University of Toronto 10 King's College Road, Toronto Ontario M5S 3G4 Canada
ENEA Fusion and Technology for Nuclear Safety and Security Department Casaccia R.C. Rome 00123 Italy
Funding
National Natural Science Foundation of China · Natural Science Foundation of Jiangsu Province · Fundamental Research Funds for the Central Universities
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