Transparent 0D Antimony Halides Glassy Wafer with Near-Unity Photoluminescence Quantum Yield for High Spatial Resolution X-Ray Imaging

Abstract

Large-sized transparent scintillators with a high photoluminescent quantum yield (PLQY) and self-absorption-free properties are highly desired to achieve high spatial resolution X-ray imaging. In this research, a transparent 0D organic–inorganic (ETP)2SbCl5 (ETP = Ethyl triphenylphosphine) amorphous wafer is developed by melting the ETPCl and SbCl3 mixture and then undergoing a quenching process. The obtained amorphous wafer exhibits a high light transmittance of 86% in the range of 450–800 nm. It also shows a light emission peak at 624 nm, a Stokes shift of 259 nm, and PLQY approaching unity (99.3%). These properties enable it to produce X-ray images with a high spatial resolution of 19.0 lp mm−1 at a modulation transfer function (MTF) value of 0.2, among the best values reported. Additionally, it also shows remarkable stability under continuous X-ray illumination. Its unique optical properties and ability to be processed in large sizes make the organic–inorganic metal halide transparent wafer a promising scintillator. This also demonstrates the potential application of the melt-quenching method in fabricating highly luminescent, low-electronic-dimensional metal halide wafers.