Logo image
Back
Molecular Sensitization Enabled High Performance Organic Metal Halide Hybrid Scintillator
Journal article   Peer reviewed

Molecular Sensitization Enabled High Performance Organic Metal Halide Hybrid Scintillator

Tunde Blessed Shonde, Maya Chaaban, He Liu, Oluwadara Joshua Olasupo, Azza Ben-Akacha, Fabiola G. Gonzalez, Kerri Julevich, Xinsong Lin, J. S. Raaj Vellore Winfred, Luis M. Stand, …
Advanced materials (Weinheim), Vol.35(23), e2301612
06/08/2023
DOI: https://doi.org/10.1002/adma.202301612
PMID: 36988220
Web of Science ID: WOS:000975876600001

Metrics

11 Record Views
33 Times Cited - Web of Science

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.

Researcher Activities   05/08/2023

ScienceDaily website (organic-inorganic hybrid materials)

Details

Logo image