Phosphors of rare earth and transition metal doped Ca1+xSr1-xGayIn2-ySzSe3-zF2, methods of manufacturing and applications

Abstract

Energy down conversion phosphors represented by the chemical formula Ca1+xSr1−xGayIn2−ySzSe3−zF2 where (0≰x≰1, 0≰y≰2, 0≰z≰3) doped with rare earth and / or transition metal elements is disclosed. Dopant impurities may be one or more species such as Eu, Ce, Mn, Ru, and / or mixtures thereof present as activators. The molar fractions x, y and z, the dopant species and the dopant concentration may be varied to tune the peak emission wavelength and / or the width of the emission peak.

Description

Background technique

[0001] The present invention relates to Ca doped with rare earth metals and / or transition metals 1+x Sr 1-x Ga y In 2-y S z Se 3-z f 2 (0≤x≤1, 0≤y≤2, 0≤z≤3) compound and its synthesis method, the compound can be used in the down-conversion of photon energy.

[0002] Solid-state lighting (SSL) technology based on light-emitting diodes (LEDs) is expected to be used in many applications, including general lighting, displays, medical systems, communication systems, and more. Significant progress in the SSL industry will depend on the availability of high-efficiency, high-energy white LEDs. Currently available commercial white LEDs, especially warm white, are not adequate for most general lighting applications. Their overall light output, luminous efficiency, color performance, and lifetime must all be improved, and their cost must be reduced, so that white LEDs can be widely used in general lighting applications. Two common approaches to producing whi...

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