Organic Manganese Halides with Near‐Unity Quantum Efficiency for High‐Resolution and Flexible X‐Ray Detection and Imaging
Jiali Fan, Hua Tong, Zhennan Zhou, Yi Lv, Haibo Li, Wei Liu, Gangfeng Ouyang
Abstract
Abstract In this paper, two new organic manganese halides (pe‐ted) 2 MnX 4 (pe‐ted + = ethylphenyltriethylenediamine cation, X = Cl, Br) are synthesized, exhibiting green luminescence with near‐unity photoluminescence quantum efficiency. (pe‐ted) 2 MnBr 4 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.