Perovskite band engineering for high-performance X-ray detection

He, Yi-Chu; Wang, Ze‐Shu; Wang, Zi; Dun, Guan‐Hua; Geng, Xiangshun; Wang, Chunlin; Du, Jiulin; Guo, Tianyu; Xie, Dan; Tian, He; Yang, Yi; Ren, Tian‐Ling

doi:10.3389/fphy.2023.1114242

Cited by 3 publications

(1 citation statement)

References 53 publications

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“…Compound 1 demonstrated excellent stability over 12 cycles of measurement, showing a very clear switching characteristic curve. Therefore, 1 has significant semiconductor properties and is an efficient X-ray responsive material. − …”

Section: Resultsmentioning

confidence: 99%

Hybrid Perovskite Molecular Rotor Ferroelastic Semiconductor Constructed by Supramolecular Assembly

Li,

Luo,

et al. 2024

Crystal Growth & Design

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Organic−inorganic hybrid ferroelastic materials have emerged as promising candidates for various applications such as mechanical switches, signal conversions, and memory materials because of their convenient processing, structural flexibility, and environmental friendliness. Here, we reported a supramolecular assembly hybrid perovskite (15-crown-5•NH 4 ) 2 TeCl 6 (1) semiconductor containing stator ammonium and rotor 15-crown-5 as cations and TeCl 6 as an anionic part. This hybrid perovskite shows a ferroelastic phase transition and dielectric switch induced by the motions of the crown rotor. In addition, it shows an X-ray detection response with a clear switching ratio of photocurrent 0.011 and dark current 0.001 nA cm −2 . This study reveals the advantages of a supramolecular rotor strategy in discovering novel molecular ferroelastic semiconductor materials and provides a new avenue to explore functional hybrid molecular materials.

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Section: Resultsmentioning

confidence: 99%

Hybrid Perovskite Molecular Rotor Ferroelastic Semiconductor Constructed by Supramolecular Assembly

Li,

Luo,

et al. 2024

Crystal Growth & Design

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Highly Stable and Sensitive (PEA)₂PbBr₄/CsPbBr₃ Single‐Crystal Heterojunction X‐Ray Detector with Ultra‐Low Detection Limit

Xu,

Xi,

Sun

et al. 2024

Adv Funct Materials

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Metal halide perovskite (MHP) single crystals have shown great potential for high‐performance X‐ray detection due to their excellent carrier transport properties, tunable optical bandgap, and low‐temperature fabrication process. However, 3D perovskite single crystals suffer from severe ion migration, limiting the stability and sensitivity of X‐ray detectors. Herein, a lowing temperature crystallization (LTC) method for liquid‐phase epitaxial growth of 2D (PEA)2PbBr4 single‐crystal (SC) film on 3D CsPbBr3 substrate is demonstratedand a 2D/3D (PEA)2PbBr4/CsPbBr3 SC heterojunction is successfully constructed. The epitaxial (PEA)2PbBr4 layer shows a pronounced passivation effect on CsPbBr3 SC with a low trap density of 2.27 × 1010 cm−3. As such, the prepared 2D/3D heterojunction X‐ray detector achieves a record‐low detectable dose rate of 3.05 nGyair s−1 and high sensitivity of 34496 µC Gyair−1 cm−2 in 120 keV hard X‐ray detection, with a largely suppressed dark current drift of 2.49 × 10−4 nA cm−1 s−1 V−1. In addition, the heterojunction detector exhibits a self‐driven sensitivity of 44 µC Gyair−1 cm−2 due to its built‐in electric field. This work provides a simple strategy to controllable construct 2D/3D MHP SC heterojunction with excellent optoelectronic characteristic, which is conducive to promoting the development of MHP SC X‐ray detectors and other optoelectronic devices.

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Perspective of perovskite-based X-ray hybrid pixel array detectors

Fiederle,

Baumbach

2024

Front. Phys.

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Compound semiconductors are playing a major role in the production of X-ray pixel detectors for the application in laboratories and beamlines at photon sources. The performance of these detectors has constantly been improved for the last decades but experiments are still limited by the properties of the detector material, especially under high flux illumination. The fast development of perovskite crystals opens the possibility for new materials to be used as highly efficient X-ray pixel detectors. The published data until now, of the transport properties, demonstrate the large potential of perovskite semiconductors. The achieved values are comparable with the ones of CdTe-based detectors. This paper presents potential perovskite-based detector materials and compares their performance with the state-of-the-art CdTe-based detectors. The perspectives of perovskite semiconductors are promising for the production of large area X-ray detectors but still some challenges remain.

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Perovskite band engineering for high-performance X-ray detection

Cited by 3 publications

References 53 publications

Hybrid Perovskite Molecular Rotor Ferroelastic Semiconductor Constructed by Supramolecular Assembly

Hybrid Perovskite Molecular Rotor Ferroelastic Semiconductor Constructed by Supramolecular Assembly

Highly Stable and Sensitive (PEA)₂PbBr₄/CsPbBr₃ Single‐Crystal Heterojunction X‐Ray Detector with Ultra‐Low Detection Limit

Perspective of perovskite-based X-ray hybrid pixel array detectors

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Perovskite band engineering for high-performance X-ray detection

Cited by 3 publications

References 53 publications

Hybrid Perovskite Molecular Rotor Ferroelastic Semiconductor Constructed by Supramolecular Assembly

Hybrid Perovskite Molecular Rotor Ferroelastic Semiconductor Constructed by Supramolecular Assembly

Highly Stable and Sensitive (PEA)2PbBr4/CsPbBr3 Single‐Crystal Heterojunction X‐Ray Detector with Ultra‐Low Detection Limit

Perspective of perovskite-based X-ray hybrid pixel array detectors

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Highly Stable and Sensitive (PEA)₂PbBr₄/CsPbBr₃ Single‐Crystal Heterojunction X‐Ray Detector with Ultra‐Low Detection Limit