Structural Reconfiguration via Alternating Cation Intercalation of Chiral Hybrid Perovskites for Efficient Self-Driven X-ray Detection

• DOI: 10.1021/acsami.4c14963
• Publication Date: 2024-12-02T21:18:27Z
• Authors: Guirong Chen; Zeng-Kui Zhu; Jianbo Wu; Panpan Yu; Ying Zeng; Hongliang Dai; Huawei Yang; Wenhui Wu; Yueying Wang; Junhua Luo
• Keywords: Control reconfiguration

2D hybrid perovskites (HPs) have great potential for high-performance X-ray detection due to their strong radiation absorption and flexible structure. However, there remains a need explore avenues enhancing capabilities. Optimizing the performance through modification of structural properties presents promising strategy. Herein, we impact modifying organic spacer layer in two distinct layered HPs, namely, Ruddlesden–Popper (R-MPA)2PbBr4 (R-1, R-MPA = methylphenethylammonium) (R-MPA)EAPbBr4 (EA ethylammonium) (R-2) with alternating cation intercalation (ACI), on performance. The insertion EA into R-2 results flatter inorganic skeleton, narrower spacing, higher density compared R-1. This effectively optimizes carrier transport R-2, Notably, exhibits polar structure intrinsic spontaneous polarization, contributing bulk photovoltaic 0.4 V. feature enables single-crystal detectors achieve self-driven low limit 82.5 nGy s–1 under 0 V bias. work highlights efficacy ACI strategy its significant effect properties, providing insights design optimization new materials.