Progress of Lead-Free Halide Perovskite X-ray Detectors

Lead halide perovskite for radiation detection still faces significant challenges despite its exciting progress. The main issues which hinder further development are the toxicity problem of lead and the intrinsic instability for volatile organic parts in lead-based perovskites. Therefore, searching for low-toxic and intrinsically stable perovskite materials have drawn a great attention from the public. In this review, lead-free perovskites are divided into two types: double perovskites type as A
₂
M
_I
M
_II
X
₆
and low-dimensional perovskites type as A
₃
W
₂
X
₉
. The synthesis methods of these lead-free perovskites are discussed and the performance on X-ray detection are accordingly summarized. Moreover, a brief outlook on the future development of lead-free perovskites in radiation detection is proposed.