Environment Friendly and Highly Efficiency Organic Antimony Halide Scintillator for Light Emitting Diode and X-Ray Imaging

Metal halides with high luminescence property have emerged as novel candidate scintillator for X-ray detection and imaging. However, there are two major reasons (toxicity and poor stability) to restrict their optoelectronic applications. Low-dimensional organic-inorganic halide consisting of heavy metals free composition provides unique optical properties and luminescence applications. Herein, a lead-free zero-dimensional antimony hybrid single crystal-(MPP)2SbCl5 (MPP =Methyltriphenylphosphonium) is developed through facile synthesis with nearly 100% photoluminescence quantum yield peaking at 590 nm. The (MPP)2SbCl5 single crystal exhibited fantastic thermal stability with phase transition temperature of 600 K and air stability with exposure to air at least 6 months. Moreover, single crystals with a product yield of 100% are prepared by an environment-friendly method that is devoid of any toxic solvents and pollution throughout the process. A white light emitting diode device using broad-band emissive single crystal (MPP)3SbCl6 on a blue chip exhibited a pure white light (CRI=93). Meanwhile, a flexible scintillation screen with high light yield of 28000 photon MeV-1, a low detection limit of 532 nGy s-1, and a spatial resolution of 5.4 lp mm-1 was fabricated by (MPP)2SbCl5 single crystal and Polydimethylsiloxane, which indicate fantastic potential of environmental friendly (MPP)2SbCl5 in optoelectronic detection applications.