Manganese-based organic metal halides,due to their excellent optoelectronic properties and stable chemical nature,have been widely used in optoelectronic devices and sensors.In this study,through rational modulation o...Manganese-based organic metal halides,due to their excellent optoelectronic properties and stable chemical nature,have been widely used in optoelectronic devices and sensors.In this study,through rational modulation of halogens,three novel zero-dimensional organic manganese halides[(C_(6)H_(8)N)_(2)MnX_(4)(X=Cl,Br,and I)]were obtained by changing the halogen atom via the solvent evaporation method.Due to the d–d electronic transition of Mn^(2+) in the tetrahedrally coordinated[MnX4]^(2−)polyhedron,all samples exhibit strong green emission.Notably,(C_(6)H_(8)N)_(2)MnBr_(4) exhibited a remarkable light yield of 18224 photons per MeV and a low detection limit of 1.9μGy s^(−1),which is below the X-ray diagnostic limit and even superior to that of commercial BGO scintillators.Moreover,a 9 cm×9 cm flexible scintillator film was successfully fabricated by mixing(C_(6)H_(8)N)_(2)MnBr_(4) crystalline powder with polymethyl methacrylate,and this film manifested superior radiation stability and an X-ray imaging resolution of 12.1 lp mm^(−1).Notably,the X-ray images captured by the flexible film demonstrate distinguished clarity when adhered perfectly to curved metal sheets.The combination of excellent performance and facile solution processing opens new opportunities for low-cost,high-performance organic metal halide-based large-area flexible scintillators for X-ray detection and imaging.展开更多
基金financial support from the National Natural Science Foundation of China(Grant No.62305195)the projects ZR2024ME223 and ZR2022QF036 supported by the Shandong Provincial Natural Science Foundationthe Opening Project of State Key Laboratory of Crystal Materials(Shandong University,KF2105).
文摘Manganese-based organic metal halides,due to their excellent optoelectronic properties and stable chemical nature,have been widely used in optoelectronic devices and sensors.In this study,through rational modulation of halogens,three novel zero-dimensional organic manganese halides[(C_(6)H_(8)N)_(2)MnX_(4)(X=Cl,Br,and I)]were obtained by changing the halogen atom via the solvent evaporation method.Due to the d–d electronic transition of Mn^(2+) in the tetrahedrally coordinated[MnX4]^(2−)polyhedron,all samples exhibit strong green emission.Notably,(C_(6)H_(8)N)_(2)MnBr_(4) exhibited a remarkable light yield of 18224 photons per MeV and a low detection limit of 1.9μGy s^(−1),which is below the X-ray diagnostic limit and even superior to that of commercial BGO scintillators.Moreover,a 9 cm×9 cm flexible scintillator film was successfully fabricated by mixing(C_(6)H_(8)N)_(2)MnBr_(4) crystalline powder with polymethyl methacrylate,and this film manifested superior radiation stability and an X-ray imaging resolution of 12.1 lp mm^(−1).Notably,the X-ray images captured by the flexible film demonstrate distinguished clarity when adhered perfectly to curved metal sheets.The combination of excellent performance and facile solution processing opens new opportunities for low-cost,high-performance organic metal halide-based large-area flexible scintillators for X-ray detection and imaging.
