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Determination of Crystal Structures

Determination of Crystal Structures

In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...

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Updated: Jun 10, 2026

Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films

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Fast Photopolymerization-Enabled Heterogeneous Bonding for Perovskite Single Crystal-Integrated X-ray Detectors.

Xuhui Wu¹, Chen Sun¹, Liangji Li¹

¹MIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China.

ACS Applied Materials & Interfaces

|June 9, 2026

Summary

This summary is machine-generated.

A new photopolymerization bonding method integrates perovskite single crystals (PSCs) for X-ray detection. This technique enhances stability and reduces dark current, improving device performance and enabling new applications.

Keywords:

X-ray detectors bonding integration perovskite single crystals photopolymerization

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Area of Science:

Materials Science
Optoelectronics
Solid-State Physics

Background:

Perovskite single crystals (PSCs) show promise for direct X-ray detection.
Conventional bonding methods cause mechanical and thermal instability in PSCs, limiting integration.
Brittleness and decomposition hinder the development of integrated PSC X-ray detectors.

Purpose of the Study:

To develop a novel heterogeneous bonding technology for monolithic perovskite single crystal integration.
To overcome the limitations of conventional bonding processes for PSCs.
To enhance the performance and stability of PSC-based X-ray detection devices.

Main Methods:

Photopolymerization-induced heterogeneous bonding using 4-acryloylmorpholine (ACMO).
Liquid film transfer method for rapid bonding (seconds).
Characterization of interfacial coordination, mechanical strength, electrical resistivity, and device performance.

Main Results:

Achieved robust mechanical bonding with tensile (1.81 MPa) and shear (1.50 MPa) strengths.
Polymerized ACMO exhibited high resistivity (7.72 × 10^12 Ω·cm), reducing dark current by two orders of magnitude.
Improved X-ray detection limit of detection (LOD) by 20-fold.
Demonstrated reliable uniformity (5.6% RSD) and stability (96% retention over 30 days).

Conclusions:

Photopolymerization-induced bonding offers a viable solution for monolithic PSC integration.
The developed method enhances mechanical robustness, electrical properties, and stability of PSC devices.
This technology facilitates the advancement of high-performance integrated optoelectronic devices for X-ray detection.