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Organic Manganese Halides with Near-Unity Quantum Efficiency for High-Resolution and Flexible X-Ray Detection and
Jiali Fan1, Hua Tong1, Zhennan Zhou1
1School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai, 519082, P. R. China.
Abstract:
In this paper, two new organic manganese halides (pe-ted)2MnX4 (pe-ted+ = ethylphenyltriethylenediamine cation, X = Cl, Br) are synthesized, exhibiting green luminescence with near-unity photoluminescence quantum efficiency. (pe-ted)2MnBr4 shows good linear response to X-ray dose rate, with a high light yield of ≈62 000 photons MeV-1 and low detection limit of 1.376 µGy s-1. Flexible scintillator film is prepared by blending with polydimethylsiloxane for high-resolution imaging, with a low detection limit (5.173 µGy s-1), an excellent X-ray imaging spatial resolution (18.0 lp mm-1) and an impressive X-ray irradiation switching stability (3.6 mGy s-1). WLED of high color rendering index has also been fabricated. These findings represent an example of shapeable X-ray scintillators, providing new possibilities for curved and 3D X-ray imaging.
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