High-sensitivity X-ray imaging of a lead halide perovskite single-crystal scintillator
Qiang Xu, Wenyi Shao, Yang Li, Zhichao Zhu, Bo Liu, Xiaoping Ouyang, Jun Liu
Abstract
Low-dose rate detection and high contrast are required to reduce unwanted ionization irradiation for X-ray imaging procedure. Recently, low-cost solution-processed hybrid lead halide perovskite has been demonstrated for direct X-ray detection. However, the performances are limited by the relative poor charge collection. Here we report an organic-inorganic perovskite single-crystal scintillator with high sensitivity for X-ray imaging. High-quality scintillator crystals have been synthesized using the solution-processed method at a low temperature with X-ray excited light emission wavelength of 432 nm. The lowest detectable dose rate is <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mn>114.7</mml:mn> </mml:mrow> <mml:mspace width="thickmathspace"/> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mi mathvariant="normal">n</mml:mi> <mml:mi mathvariant="normal">G</mml:mi> <mml:mi mathvariant="normal">y</mml:mi> </mml:mrow> <mml:mspace width="thickmathspace"/> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:msup> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mi mathvariant="normal">s</mml:mi> </mml:mrow> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mo>−</mml:mo> <mml:mn>1</mml:mn> </mml:mrow> </mml:msup> </mml:mrow> </mml:math> , which is comparable with the best perovskite-based photoconductor X-ray detector for a 50 keV X-ray. We achieved a high-contrast X-ray image that proves the feasibility for medical applications.