Toward Understanding the Current Drift Using Pulsed Voltage for a Stable Perovskite X-ray Detector

ACS Photonics, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 4, 2024

Language: Английский

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Lead-Free Bismuth-Based Perovskite X-ray Detector with High Sensitivity and Low Detection Limit

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(29), P. 38283 - 38289

Published: July 16, 2024

Bismuth-based halide perovskites have shown great potential for direct X-ray detection, attributable to their nontoxicity and advantages in detection sensitivity spatial resolution. However, the practical application of such materials still faces critical challenge combining both high low limits. Here, we report a new type zero-dimensional (0D) perovskite (HIS)BiI5 (1, where HIS2+ = histamine) with limit. Structurally, strong N-H···I hydrogen bonds between cations inorganic frameworks enhance rigidity structure diminish intermolecular distance adjacent [Bi2I10]4- dimers. By virtue structural merits, single crystal 1 exhibits excellent physical properties perpendicular (001) (010) faces. Perpendicular face, exhibited electrical resistivity (2.31 × 1011 Ω cm) large carrier mobility-lifetime product (μτ) (2.81 10-4 cm2 V-1) under illumination. Benefiting from these superior properties, it demonstrates an capability approximately 103 μC Gyair-1 cm-2 limit 36 nGyair s-1 directions These results provide promising candidate material development new, lead-free, high-performance detectors.

Language: Английский

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

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 2, 2024

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.

Language: Английский

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Chiral-Polar Alternating Cation Intercalation-Type Perovskite Enables Sensitive Self-Driven X-ray Detection with an Ultralow Detection Limit

The Journal of Physical Chemistry Letters, Journal Year: 2024, Volume and Issue: unknown, P. 12348 - 12356

Published: Dec. 9, 2024

Metal halide perovskites (MHPs) have shown great potential for direct X-ray detection, but achieving high sensitivity without external bias remains challenging. Chiral-polar alternating cation intercalation (ACI)-type MHPs, with excellent optoelectronic properties and a robust chirality-induced bulk photovoltaic effect (BPVE), offer promising platform self-driven detection. Herein, impressive detection performance was achieved by utilizing chiral-polar 2D ACI-type perovskite single crystals of (

Language: Английский

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