Xiaojia Zheng

Elastomeric grain-boundary crosslinking toughens thick perovskite for scalable X-ray imaging

Xiaojuan Lu, Xiangzhe Li, Zhenghui Fan, Ruihan Yuan et autres

The integration of perovskites into flat-panel X-ray imagers (FPXIs) requires thick absorber layers to ensure efficient X-ray attenuation. However, the inherently large thermal expansion coefficient of perovskites leads to significant internal stress buildup during crystallization and thermal cycling, often resulting in grain-boundary …

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From Materials to Medical Images: Translating Perovskite‐Based X‐Ray Detectors Toward Clinical Imaging

Sibin Wang, Yongrui Yang, Kai Zhang, Xiaojuan Lu et autres

As an indispensable part of modern diagnosis and image-guided therapy, medical X-ray imaging requires detector materials that combine low-dose operation, high spatial resolution, fast response, energy-resolved capability, long-term stability, and scalable integration. Metal halide perovskites are promising candidates for high-performance and low-cost …

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Melt‐Processable Perovskite Semiconductors for Sensitive x‐ray Detection

Changyao Zhou, Ruihan Yuan, Min Zhang, Wanjia Tian et autres

ABSTRACT Metal halide perovskite x‐ray detectors are currently garnering significant research attention due to their ability to effectively detect x‐ray radiation with a low threshold. However, their practical development is impeded by challenges in fabricating high‐quality crystalline perovskite films with several hundred …

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Stock Market Liberalization, Foreign Investors, and Firm Labor Investment: Evidence From China

Changyu Hu, Zhan Jiang, Xiaojia Zheng, Bing Zhu

ABSTRACT Analyzing the Shanghai‐Hong Kong and Shenzhen‐Hong Kong Stock Connect (SHSZ‐HK Connect) programs as quasi‐natural experiments, our study reveals that stock market liberalization increases labor investment efficiency. The effect is more pronounced in firms with higher foreign ownership, as liberalization enhances their …

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Strain–Phase Transition Interplay in Perovskites: Coupling Mechanisms and Regulation Strategy

Ruihan Yuan, Kun Chen, Xiaojia Zheng

Strain is a crucial factor determining the efficiency and stability of perovskite optoelectronic devices. Current research typically attributes the residual strain in perovskites to the thermal expansion that occurs during the annealing process due to the intrinsically weak chemical bonds and soft …

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Stress-strain effects induced by phase transitions in two-dimensional perovskites with alkylamine cations

Wanjia Tian, Zhenghui Fan, Shujie Tie, Ruihan Yuan et autres

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Multiscale Coupling Between Macroscopic Mechanics and Atomic Assembly (MM–AA) of Soft‐Lattice Halide Perovskites

Xiangzhe Li, Lizhi Ren, Xiaojia Zheng, Bed Poudel et autres

ABSTRACT Halide perovskites are promising candidates for optoelectronic devices, but their solution‐processed films frequently suffer from solute aggregation, crystalline disorder, and random orientation, that is, defects that significantly compromise device performance. These issues arise from complex multiscale interactions during film formation, where …

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Inhibiting Ionic Migration by Potassium Ion Doping for Sensitive BA2MA3Pb4I13 Perovskite X‐Ray Detector

Shujie Tie, Yazhou Wei, Xiaojuan Lu, Wanjia Tian et autres

Lead‐based halide perovskites have excellent photoelectric properties and are considered as one of the most promising materials for X‐ray detection. At present, the degradation of lead‐based materials due to ion migration phenomenon and the long‐term instability of the prepared devices are still …

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High-Performance Lead-Free Cs3Bi2IxBr9–x Perovskite X-ray Detector Based on Anionic Engineering

Shujie Tie, Xiaojuan Lu, Guohong Tang, Wanjia Tian et autres

Halide perovskites have garnered significant attention in the field of X-ray detection due to their tunable band gap, strong X-ray absorption capability, and superior optoelectronic properties. However, the high levels of dark current and noise are detrimental to low-dose and high-sensitivity X-ray …

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Dynamic monolithic X-ray imager with enhanced performance via strain relaxation in metal-halide scintillators

Chongrui Shu, Caixin Zhang, Ruihan Yuan, Xixi Liu et autres

This work presents an approach for developing high-resolution dynamic monolithic X-ray imaging systems using metal halide scintillators, which exhibit high light yield and effectively suppress optical crosstalk.

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High‐Performance Perovskite Flat Panel X‐Ray Imagers via Blade Coating

Aiping Zhang, Shujie Tie, Xiaojuan Lu, Wanjia Tian et autres

Abstract Perovskite X‐ray detectors are recognized as the most promising candidates for low‐dose detectors due to their superior performance. However, it is still full of challenging in the fabrication of flat‐panel X‐ray imagers (FPXIs), primarily due to the absence of large area …

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Zero‐Dimensional Lead‐Free Perovskite Single Crystals for the Sensitive Detection of Visible Light and X‐Rays

Min Zhang, Lin Lei, Xiaojia Zheng

Abstract The excellent performance and facile fabrication process of perovskite semiconductor materials make them highly promising candidates in the field of optoelectronic devices. Whether for visible light or X‐rays, detectors with low detection limits can better identify weak light signals, significantly reducing …

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