A copper-based halide and a method of making and using the same

By preparing copper-based halides with the chemical formula (C6H8N)CuI2 or (C6H7N)CuI, the problems of toxicity and preparation complexity of lead-based halides have been solved, enabling low-cost and high-efficiency green light-emitting devices.

CN122404210APending Publication Date: 2026-07-17TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
Filing Date
2025-01-17
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing lead-based halide materials contain the toxic heavy metal element Pb, which limits their commercial application value. Meanwhile, alternative materials are costly and have poor stability, and the preparation process of Cu+-based halides is complex and difficult to promote.

Method used

Highly crystalline copper-based halides were prepared by reacting 4-methylpyridine and cuprous iodide in specific acid reagents and organic solvents with copper-based halides having the chemical formula (C6H8N)CuI2 or (C6H7N)CuI, followed by crystallization treatment.

Benefits of technology

The preparation process is simple and the cost is low. Copper-based halides exhibit efficient green light emission under visible light excitation, making them suitable for use in light-emitting devices and avoiding the use of toxic heavy metals.

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Abstract

This invention discloses a copper-based halide, its preparation method, and its applications. The copper-based halide material provided by this invention has the chemical formula (C6H8N)CuI2 or (C6H7N)CuI; wherein, the space group of the copper-based halide (C6H8N)CuI2 is C2 / m, and the cell parameters are α=γ=90°, β=90.0500°; the space group of the copper-based halide (C6H7N)CuI is P21 / c, and the cell parameters are α=γ=90°, β=92.8900°. The preparation process of the copper-based halide is simple, low-cost, and has high crystallinity. This invention also found that the copper-based halide can be effectively excited by visible light with a wavelength of around 394nm, exhibits strong green light emission around 540nm, and has high luminous efficiency, making it suitable for manufacturing light-emitting devices and applications in lighting, liquid crystal display backlighting, and other fields.
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