Luminescent properties and multifunctional application of a highly efficient green-emitting organic-inorganic hybrid Mn(II) halide

Herein, we obtained a zero-dimensional organic-inorganic hybrid halide of C 7 H 18 N 2 MnBr 4 , whose crystal structure has been confirmed by the single-crystal X-ray diffraction. The single-crystal shows intense green emission with a high internal quantum efficiency of 85.0% and an external quantum efficiency 42.1%. Meanwhile, it also exhibits good thermal stability at elevated temperatures. Taking advantage of its efficient blue light absorption and emission, we fabricated two white light-emitting diodes by combining it with commercial K 2 SiF 6 :Mn 4+ or SrAlSiN 3 :Eu 2+ to investigate its potential in backlighting and lighting application. The former with K 2 SiF 6 :Mn 4+ achieves a wide color gamut of 95.8% of National Television System Committee standard. The latter reaches a high color rendering index of 94.2 and a low correlated color temperature of 3562 K. The fabricated C 7 H 18 N 2 MnBr 4 @polydimethylsiloxane flexible transparent scintillation screen further proves its good X-ray scintillation performance with a detection limit of 19.27 μGy/s and a light yield of 14,670 photons/MeV. This work provides convincing experimental evidence for the multifunctional application of organic-inorganic hybrid Mn(II) halides.