Light Scattering Suppression in Organometallic Halide Glasses by Microporous Silicon Embedding

Organic–metal halide hybrids have advantageous
luminous
qualities and can be processed at low temperatures. These materials
present a sustainable, cost-efficient, and effective solution for
X-ray scintillators compared to all-inorganic scintillators. However,
challenges, such as surface photon scattering and difficult uniformity
control of the scintillator surface, continue to impede resolution
improvement. In this study, we present a melt-quenching process to
incorporate a zero-dimensional hybrid halide (MTP)2MnBr4 (methyltriphenylphosphonium bromide = MTPBr) into a microporous
silicon substrate (3 × 3 cm). The (MTP)2MnBr4 glass embedded microporous silicon substrate scintillator screen
achieves exceptional X-ray performance metrics by exploiting its outstanding
luminescence properties, high optical transparency, and effective
photon wave guidance via microporous arrays on screen surfaces. It
delivers a high X-ray light yield of 16,840 photons/MeV, with a low
detection limit of 135 nGy/s, and achieves an exceptional X-ray imaging
spatial resolution of 25 lp/mm. Furthermore, the (MTP)2MnBr4 single crystal grown via low-temperature evaporation
shows remarkable retention of radioluminescence intensity and an exceptional
light yield of 60,790 photons/MeV. This approach combines low toxicity,
ease of processing, scalability, low detection limit, significant
light yield, and high spatial resolution, making it suitable for widespread
adoption in various X-ray applications.