Blue-cyan fluorescent powder doped with multiphase Eu < 2 + > and charge compensation agent and preparation method of blue-cyan fluorescent powder

By using blue-cyan phosphors doped with multiphase Eu²⁺ and charge compensators, the problems of complex manufacturing processes and high costs of white LEDs have been solved, achieving excellent performance with high color rendering index and spectral continuity, simplifying the packaging process and reducing production costs.

CN122146291APending Publication Date: 2026-06-05XINJIANG NORMAL UNIVERSITY
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Patent Information

Application Number
CN202610287712.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-10
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

In the existing technology, the preparation process of white LEDs is complex and costly, and the cyan phosphor prepared by traditional methods has reabsorption phenomenon and luminous blank, which affects the color rendering index.

Method used

By using multiphase Eu²+ and charge compensator-doped blue-cyan phosphors, and precisely controlling the phase transition from potassium feldspar to leucite, combined with natural potassium feldspar, lithium carbonate, sodium carbonate, rubidium carbonate, cesium chloride and other raw materials, a blue-cyan phosphor with ultra-wide bandwidth was prepared, simplifying the preparation process and reducing costs.

Benefits of technology

It achieves efficient integration of blue-cyan phosphors with near-ultraviolet chips and red phosphors, improving the color rendering index to 95.5, exhibiting excellent spectral continuity, simplifying the packaging process of white LEDs and reducing production costs.

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Abstract

The invention discloses multiphase Eu < 2 + > and charge compensation agent doped blue-green fluorescent powder and a preparation method thereof, and belongs to the technical field of fluorescent powder, the molar ratio general formula of the multiphase Eu < 2 + > and charge compensation agent doped blue-green fluorescent powder is KAlSi3O8: 3mol% Eu < 2 + >: xmol% M < + >, 1.0 < = x < = 11.0, M < + > is selected from four charge compensation ions of Li < + >, Na < + >, Rb < + > and Cs < + >, and the ion radius of M < + > is controllably different from that of K < + >. Due to the unique structural design, the prepared fluorescent powder can emit adjustable strong blue-green light under the excitation of near ultraviolet-blue light, and the luminescence thermal quenching performance, the quantum efficiency and the spectral stability of the fluorescent powder are all remarkably improved. The fluorescent powder is applied to white light LED device packaging, and efficient and wide-spectrum blue-green emission and cyan spectrum components of the fluorescent powder can be utilized. The high-quality full-spectrum white light with a high color rendering index can be realized under the conditions of simplifying the packaging process and reducing the cost only by matching the blue light chip and the single yellow / red fluorescent powder, and the white light has important application prospects in the fields of healthy illumination, high-end display and precise spectrum design.
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