As X-ray detection plays an indispensable role in industrial inspection, medical diagnosis, and security checks, the search for high-performance detection materials has never been more critical. Traditional three-dimensional (3D) metal halide perovskites show great promise for direct X-ray detection, yet their inherent ion migration severely undermines detector stability—hindering commercialization. Now, a collaborative team of researchers from institutions including Henan University, Shenzhen Institute of Advanced Technology (Chinese Academy of Sciences), and Shaanxi Normal University has developed a game-changing solution: face-/edge-shared 3D heterometallic glycinate hybrid perovskitoid single crystals (SCs) with suppressed ion migration. Their findings, published in Nano-Micro Letters , offer a new pathway for stable, high-sensitivity X-ray detection.
Why These 3D Perovskitoid SCs Stand Out
The core innovation lies in the unique design of the perovskitoid crystals, which addresses the long-standing ion migration issue of traditional perovskites while preserving key detection capabilities:
Key Design, Synthesis, and Performance Details
1. Crystal Structure & Synthesis
The team synthesized high-quality Pb 2 CuGly 2 X 4 SCs via a simple water evaporation method:
2. Optoelectronic Advantages
Density functional theory (DFT) calculations and experimental characterizations revealed additional strengths:
3. Toward Practical Imaging: TFT Array Detector
To enable real-world X-ray imaging, the team developed a scalable thin-film transistor (TFT) array detector:
Future Outlook & Significance
This work addresses a core challenge in perovskite-based X-ray detection: balancing sensitivity with stability. The amino acid ligand-metal cross-linking strategy not only expands the library of 3D perovskitoid materials but also provides a general design principle for suppressing ion migration in ionic semiconductors.
Looking ahead, the team aims to optimize the quality of Pb 2 CuGly 2 Cl 4 thin films to further boost the TFT array detector’s sensitivity. Additionally, exploring other metal-amino acid combinations could unlock even higher-performance materials for next-generation X-ray imaging systems—from medical radiography to industrial non-destructive testing.
Stay tuned for more innovations from this collaborative team, as they continue to bridge materials design and practical detection applications!
Nano-Micro Letters
Experimental study
Face‑/Edge‑Shared 3D Perovskitoid Single Crystals with Suppressed Ion Migration for Stable X‑Ray Detector
23-Jun-2025