Journal article
Molecular Sensitization Enabled High Performance Organic Metal Halide Hybrid Scintillator
Advanced materials (Weinheim), Vol.35(23), e2301612
06/08/2023
PMID: 36988220
Web of Science ID: WOS:000975876600001
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Abstract
Scintillators, one of the essential components in medical imaging and security checking devices, rely heavily on rare-earth-containing inorganic materials. Here, a new type of organic-inorganic hybrid scintillators containing earth abundant elements that can be prepared via low-temperature processes is reported. With room temperature co-crystallization of an aggregation-induced emission (AIE) organic halide, 4-(4-(diphenylamino) phenyl)-1-(propyl)-pyrindin-1ium bromide (TPA-PBr), and a metal halide, zinc bromide (ZnBr2), a zero-dimensional (0D) organic metal halide hybrid (TPA-P)(2)ZnBr4 with a yellowish-green emission peaked at 550 nm has been developed. In this hybrid material, dramatically enhanced X-ray scintillation of TPA-P+ is achieved via the sensitization by ZnBr42-. The absolute light yield (14,700 +/- 800 Photons/MeV) of (TPA-P)(2)ZnBr4 is found to be higher than that of anthracene (approximate to 13,500 Photons/MeV), a well-known organic scintillator, while its X-ray absorption is comparable to those of inorganic scintillators. With TPA-P+ as an emitting center, short photoluminescence and radioluminescence decay lifetimes of 3.56 and 9.96 ns have been achieved. Taking the advantages of high X-ray absorption of metal halides and efficient radioluminescence with short decay lifetimes of organic cations, the material design paves a new pathway to address the issues of low X-ray absorption of organic scintillators and long decay lifetimes of inorganic scintillators simultaneously.
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Scintillating science: Researchers improve materials for radiation detection and imaging technology
ScienceDaily website (organic-inorganic hybrid materials)Details
- Title
- Molecular Sensitization Enabled High Performance Organic Metal Halide Hybrid Scintillator
- Publication Details
- Advanced materials (Weinheim), Vol.35(23), e2301612
- Resource Type
- Journal article
- Publisher
- Wiley
- Number of pages
- 9
- Grant note
- Florida State University Commercialization Investment Program DMR- 2204466 / National Science Foundation (NSF) CHE-1828362 / NSF MRI program; National Science Foundation (NSF); NSF - Office of the Director (OD)
- Copyright
- © 2023 Wiley-VCH GmbH
- Identifiers
- WOS:000975876600001; 99381442986506600
- Academic Unit
- Chemistry; Hal Marcus College of Science and Engineering
- Language
- English