One-Dimensional Hybrid Lead Halide Crystals with Molecular Pb-N Coordination for High-Performance Radiation Detection

Area of Science:

• Materials Science
• Solid-State Chemistry
• Optoelectronics

Background:

• Low-dimensional hybrid metal halides (HMHs) show promise for optoelectronics.
• Existing HMHs suffer from structural instability and poor carrier transport due to weak organic-inorganic interactions.

Purpose of the Study:

• To design stable, high-performance hybrid semiconductors.
• To improve carrier transport and structural integrity in HMHs.

Main Methods:

• Synthesized one-dimensional hybrid lead halide crystals using multidentate aminoazole molecules.
• Utilized Pb-N coordination bonds to enhance structural locking and electronic coupling.
• Fabricated X-ray detectors using ATDZPbBr3 polycrystalline wafers.

Main Results:

• Achieved dual-side bonding, locking the hybrid structure and hindering ion migration.
• Promoted charge transport via electronic orbital overlap.
• Demonstrated an X-ray detector with record sensitivity (1.63 × 10^4 μC Gyair^-1 cm^-2) and a low detection limit (19.7 nGy s^-1).

Conclusions:

• Coordination chemistry is a viable strategy for designing stable HMHs.
• The developed materials offer superior performance for optoelectronic applications, particularly in X-ray detection.