A Low‐Dimensional Donor‐Acceptor Perovskite for High‐Performance X‐Ray Detection

作者：Wanting Pan, Weijun Li, Jia Zong, Haijing Hu, Keke Guo, Chenglong Li, Wei Qu, Haotong Wei · 发表于：Advanced Functional Materials · 年份：2024 · DOI：10.1002/adfm.202414553 · 被引用次数：13 · 研究领域：Perovskite Materials and Applications、Advanced Condensed Matter Physics、Magnetic and transport properties of perovskites and related materials

Abstract Perovskite materials hold significant promise for X‐ray detection due to their high X‐ray attenuation coefficient, efficient charge mobility, and tunable compositions and optoelectronic properties. Nonetheless, extracting the charges deep inside the thick semiconductors remains a challenge. Here, the 1D cytidine lead bromide perovskite (CytPbBr 3 ) with a regularly arranged Donor (D)–Acceptor (A) heterojunction structure is reported. The organic interlayer contributes to the conduction band, while the inorganic framework constructs the valance band. Such a D–A heterojunction structure offers two separate channels for electrons and holes transport, suppressing the charge recombination rates with improved charge collection efficiency, and thus yields a high device sensitivity of 1.2 × 10 6 µC Gy air −1 cm −2 with a low noise equivalent dose (NED) of 44.6 pGy air .