Europium complex and method for preparing gallium nitride-based red light emitting diode by using europium complex as precursor

By using the oxygen-free europium complex Eu(Dmphen)2Cl3 as a precursor, the fluorescence quenching problem caused by oxygen impurities in europium-doped gallium nitride-based red micro-LED devices was solved, achieving efficient and stable europium doping, improving luminous efficiency and device performance, and making it suitable for full-color display and optical structure design.

CN122255157APending Publication Date: 2026-06-23XIDIAN UNIV
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Patent Information

Application Number
CN202610455500.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-08
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

In the existing technology, europium-doped gallium nitride-based red micro LED devices suffer from fluorescence quenching caused by oxygen impurities, resulting in low luminous efficiency. Furthermore, existing europium precursors are incompatible with molecular beam epitaxy processes, making it difficult to achieve efficient and stable europium doping.

Method used

Using the oxygen-free europium complex Eu(Dmphen)2Cl3 as a precursor, europium doping was performed via metal-organic chemical vapor phase epitaxy to prepare gallium nitride-based red LEDs, avoiding the introduction of oxygen impurities and improving luminous efficiency.

Benefits of technology

It significantly improves the red light luminous efficiency of gallium nitride-based red LEDs, enhances the luminous performance and stability of the device, reduces the oxygen impurity concentration, and is suitable for full-color optical structure design.

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Abstract

The invention provides a europium complex and a method for preparing a gallium nitride-based red light emitting diode by using the europium complex as a precursor, the molecular formula of the europium complex is C28H24Cl3EuN4, the chemical formula of the europium complex is Eu (Dmpphen) 2Cl3, Dmpphen represents 4, 7-dimethyl-1, 10-phenanthroline, and Dmpphen represents 4, 7-dimethyl-1, 10-phenanthroline. The complex does not contain oxygen atoms and can be used as an oxygen-free precursor for growing a gallium nitride-based miniature red light LED, the problem of fluorescence quenching caused by introduction of oxygen impurities in an existing europium doping technology is fundamentally solved, the red light emitting efficiency of the gallium nitride-based red light LED is remarkably improved, and the light emitting performance and stability of a device are improved.
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