Exploring Non-Toxic Lower Dimensional Perovskites for Next-Generation X-Ray Detectors

Area of Science:

• Materials Science
• Condensed Matter Physics
• Solid-State Chemistry

Background:

• Organometal halide perovskites exhibit exceptional photophysical properties, making them suitable for X-ray detection.
• The presence of toxic lead in conventional perovskites hinders commercialization, necessitating the development of lead-free alternatives.
• Lower-dimensional perovskites (LPVKs) have emerged as promising candidates due to their tunable properties and enhanced stability.

Purpose of the Study:

• To review the structural organization and properties of lead-free lower-dimensional perovskites (LPVKs).
• To elaborate on the synthesis routes and applications of LPVKs in direct X-ray detectors (XDs).
• To discuss device performance metrics, challenges, and future directions for LPVK-based XDs.

Main Methods:

• Summarization of perovskite (PVK) and LPVK structural organization.
• Elaboration on LPVK properties and active layer synthesis for X-ray detectors.
• Discussion and tabulation of device performance, including synthesis, architecture, size, figures of merit, and stability.

Main Results:

• LPVKs demonstrate superior X-ray detecting properties, including higher ionic migration energy, wider tunable bandgaps, and lower dark currents.
• LPVKs exhibit enhanced environmental stability compared to conventional perovskites.
• Various synthesis routes and device architectures for LPVK-based XDs have been explored and their performance characterized.

Conclusions:

• LPVKs represent a viable, non-toxic alternative for advanced X-ray detection applications.
• Optimization of LPVKs requires addressing current challenges in synthesis and device engineering.
• Further research into LPVKs will drive innovation in the field of X-ray detectors.