Zero-dimensional Cs4EuX6 (X = Br, I) all-inorganic perovskite single crystals for gamma-ray spectroscopy
- Univ. of Tennessee, Knoxville, TN (United States). Scintillation Materials Research Center; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering
- 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
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Scattering Division
- Beihang Univ., Beijing (China). Key Lab. of Micro-Nano Measurement-Manipulation and Physics (Ministry of Education), Dept. of Physics
- East China Normal Univ. (ECNU), Shanghai (China). Key Lab. of Polar Materials and Devices (Ministry of Education)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
- 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
- Univ. of Tennessee, Knoxville, TN (United States). Scintillation Materials Research Center
- 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
Web of Science
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 |
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