A New Functional Material with Dual Phase Transitions Accompanying X-ray Detection

Abstract Organic–Inorganic hybrid perovskite materials have sparked a research craze in the fields of optoelectronics and radiation detection due to their tunable structure and excellent photoelectric properties. These materials can usually integrate various phase-change materials to achieve multifunctional integration. However, research in the coupling of X-ray detection fields is still insufficient. Inspired by this, this paper successfully synthesized a new type of one-dimensional organic–inorganic hybrid perovskite material [(EMPD)PbBr3] (EMPD+ = 1-ethyl-1-methylpiperidine ion) (1). 1 not only exhibits dual reversible structural phase transitions but also has typical semiconductor characteristics and shows a fluorescence lifetime of microsecond level. At the same time, such a structure and performance make 1 have excellent X-ray response sensitivity and long-term operational stability, which shows great application potential in radiation detection and optoelectronic sensing fields. This work provides new ideas and material basis for designing multifunctional optoelectronic materials and devices with phase transition tunability and high detection performance.