FLUORESCENT SILICATE MATERIAL, LIGHT-EMPLOYING DEVICE AND METHOD FOR PRODUCING THE FLUORESCENT SILICATE MATERIAL

DE602025000253T2Active Publication Date: 2026-06-10NICHIA CORP
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Patent Information

Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
NICHIA CORP
Filing Date
2025-03-06
Publication Date
2026-06-10

AI Technical Summary

Technical Problem

Existing green-emitting fluorescent materials in light emitting devices suffer from broad light emission peaks, low light emission intensity, and poor light resistance due to photodegradation under continuous irradiation.

Method used

A silicate fluorescent material with a composition represented by A1-w-x A2 w M1 x (Li3SiO4):Eu y, where A1 and A2 are alkali elements, M1 is selected from Mg, Ca, Sr, Ba, Y, and La, and w, x, y satisfy specific molar ratios, is produced by mixing oxide compounds and heat-treating them in a reducing atmosphere to maintain divalent Eu2+ for enhanced emission and resistance.

Benefits of technology

The silicate fluorescent material achieves a narrow light emission peak, high light emission intensity, and improved light resistance against photodegradation, suitable for use in light emitting devices.

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