Perovskite Quantum Dots: A New Generation of Promising Scintillator Materials

Abstract

Scintillator materials are essential parts of X-ray imaging/detection for medical diagnostics, non-destructive detection, security inspection, and space exploration. Traditional commercial scintillators are limited by low luminescence efficiency and afterglow effect. Perovskite (ABX3) quantum dots (PQDs), with the ability to convert X-ray radiation into multi-color visible light, has emerged as a new class of competitive scintillators, based on the advantages of high X-ray absorption coefficients, fast luminescence, high luminescence efficiency, and low-cost wet chemical facile synthesis on various substrates. Understanding the relationship between the structure and luminescence of PQDs is essential for scintillator discovery and optimization. This chapter first reviewed the work principle, materials selection, and key parameters of indirect X-ray detectors, followed by the basic crystal structure, optoelectronic properties, and synthesis methods for PQDs. Then the recent advances in perovskite scintillators are comprehensively reviewed. Finally, we summarize the current challenge in perovskite scintillators with promising solutions and provide a perspective on the future direction of this emerging scintillator.