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Title: Zero-dimensional Cs4EuX6 (X = Br, I) all-inorganic perovskite single crystals for gamma-ray spectroscopy

Journal Article · · Journal of Materials Chemistry C
DOI:https://doi.org/10.1039/C8TC01458B· OSTI ID:1459274
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [5]; ORCiD logo [6];  [1];  [1];  [1];  [7];  [8];  [9]
  1. Univ. of Tennessee, Knoxville, TN (United States). Scintillation Materials Research Center; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering
  2. East China Normal Univ. (ECNU), Shanghai (China). Key Lab. of Polar Materials and Devices (Ministry of Education); East China Normal Univ. (ECNU), Shanghai (China). Dept. of Physics; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Scattering Division
  4. Beihang Univ., Beijing (China). Key Lab. of Micro-Nano Measurement-Manipulation and Physics (Ministry of Education), Dept. of Physics
  5. East China Normal Univ. (ECNU), Shanghai (China). Key Lab. of Polar Materials and Devices (Ministry of Education)
  6. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
  7. Univ. of Tennessee, Knoxville, TN (United States). Scintillation Materials Research Center; Univ. of Tennessee, Knoxville, TN (United States). Bredesen Center for Interdisciplinary Research and Graduate Education
  8. Univ. of Tennessee, Knoxville, TN (United States). Scintillation Materials Research Center
  9. Univ. of Tennessee, Knoxville, TN (United States). Scintillation Materials Research Center; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering; Univ. of Tennessee, Knoxville, TN (United States). Bredesen Center for Interdisciplinary Research and Graduate Education; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Nuclear Engineering

Organic–inorganic and all-inorganic halide perovskites have become leading candidates toward high-performance optoelectronic devices and radiation detectors. In this work, we report novel zero-dimensional Cs4EuX6 (X = Br, I) perovskite single crystals as self-activated scintillators with superior performance for gamma-ray spectroscopy. Both Cs4EuBr6 and Cs4EuI6 single crystals grown by the Bridgman method were determined to have the trigonal crystal structure with the R$$\bar{3}$$c space group, and have a melting point of approximately 540°C. Cs4EuBr6 and Cs4EuI6 exhibit blue emission under UV excitation and high light yields of 78,000 ± 4000 photons/MeV and 53,000 ± 3000 photons/MeV under 137Cs gamma-ray irradiation, respectively. In particular, the former represents the best result achieved for self-activated scintillators thus far. Thermally stimulated luminescence studies and density functional theory calculations elucidate the correlation between halogen vacancies and long-lived emission (afterglow) at room temperature in Cs4EuX6 (X=Br, I) single crystals. In conclusion, our findings not only demonstrate the high gamma-ray detection efficiency in Cs4EuX6 (X=Br, I), but will further promote the development of 0D metal halide-based novel luminescent and radiation detection materials.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1459274
Alternate ID(s):
OSTI ID: 1455088
Journal Information:
Journal of Materials Chemistry C, Vol. 6, Issue 25; ISSN 2050-7526
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 56 works
Citation information provided by
Web of Science

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Cited By (2)

Eu 2+ : A suitable substituent for Pb 2+ in CsPbX 3 perovskite nanocrystals? journal December 2019
Eu$^{2+}$: a suitable substituent for Pb$^{2+}$ in CsPbX$_3$ perovskite nanocrystals? text January 2020


Figures / Tables (7)