Abstract
Scintillation based X-ray detection has received great attention for its application in a wide range of areas from security to healthcare. Here, we report highly efficient X-ray scintillators with state-of-the-art performance based on an organic metal halide, ethylenebis-triphenylphosphonium manganese (II) bromide ((C38H34P2)MnBr4), which can be prepared using a facile solution growth method at room temperature to form inch sized single crystals. This zero-dimensional organic metal halide hybrid exhibits green emission peaked at 517 nm with a photoluminescence quantum efficiency of ~ 95%. Its X-ray scintillation properties are characterized with an excellent linear response to X-ray dose rate, a high light yield of ~ 80,000 photon MeV−1, and a low detection limit of 72.8 nGy s−1. X-ray imaging tests show that scintillators based on (C38H34P2)MnBr4 powders provide an excellent visualization tool for X-ray radiography, and high resolution flexible scintillators can be fabricated by blending (C38H34P2)MnBr4 powders with polydimethylsiloxane.
Highlights
Scintillation based X-ray detection has received great attention for its application in a wide range of areas from security to healthcare
Similar to other low-dimensional organic metal halide hybrids reported by our group28–30, 0D (C38H34P2)MnBr4 single crystals were obtained by diffusing diethyl ether into a dichloromethane (DCM) precursor solution containing ethylenebis(triphenylphosphonium bromide) (C38H34P2Br2) and MnBr2 in a ratio of 1:1
The crystal structure of (C38H34P2)MnBr4 single crystals was determined by single-crystal X-ray diffraction (SCXRD)
Summary
Scintillation based X-ray detection has received great attention for its application in a wide range of areas from security to healthcare. We report highly efficient X-ray scintillators with stateof-the-art performance based on an organic metal halide, ethylenebis-triphenylphosphonium manganese (II) bromide ((C38H34P2)MnBr4), which can be prepared using a facile solution growth method at room temperature to form inch sized single crystals This zero-dimensional organic metal halide hybrid exhibits green emission peaked at 517 nm with a photoluminescence quantum efficiency of ~ 95%. The luminescence mechanisms of this class of materials are well known, that is, from the d–d transitions in tetrahedral and octahedral crystal fields for green and red emissions, respectively[37,41] For their excellent optical properties, various applications have been demonstrated using organic manganese (II) halide hybrids. We demonstrate high-performance eco-friendly X-ray scintillators based on a 0D phosphonium manganese (II) bromide hybrid (C38H34P2)MnBr4 This organic manganese (II) halide hybrid can be prepared by using low-cost commercially available raw materials via a facile room-temperature solvent diffusion method with excellent repeatability and large scalability. Scintillators based on (C38H34P2) MnBr4 display great performance with exceptional linearity, high light yield, and low detection limits, which enable high-resolution X-ray images
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