A COATED LUMINESCENT PARTICLE, A LUMINESCENT CONVERTER ELEMENT, A LIGHT SOURCE, A LUMINAIRE AND A METHOD OF MANUFACTURING A COATED LUMINESCENT PARTICLE

摘要

A coated luminescent particle 100, a luminescent converter element, a light source, a luminaire and a method of manufacturing coating luminescent particles are provided. The coated luminescent particle 100 comprises a luminescent particle 102, a first coating layer 104 and a second coating layer 106. The luminescent particle 102 comprises luminescent material for absorbing light in a first spectral range and for converting the absorbed light towards light of a second spectral range. The luminescent material is sensitive for water. The first coating layer 104 forms a first barrier for water and comprises a metal oxide or a nitride, phosphide, sulfide based coating. The second coating layer 106 forms a second barrier for water and comprises a silicon based polymer or comprises a continuous layer of one of the materials AlPO4, SiO2, Al2O3, and LaPO4. The first coating layer 104 and the second coating layer 106 are light transmitting. The first coating layer 104 encapsulates the luminescent particle and the second coating layer 106 encapsulates the luminescent particle 102 with the first coating layer 104.

主权项

1. A coated luminescent particle, the coated luminescent particle comprising:
a luminescent particle of a luminescent material, the luminescent material being configured to absorb light in a first spectral range and to convert a portion of the absorbed light towards light of a second spectral range, a first coating layer forming a first barrier, first barrier being a water barrier, the first coating layer selected from the group of a metal oxide, a nitride, a phosphide or a sulfide based coating, a second coating layer forming a second barrier, second barrier being a water barrier, the second coating layer comprising a silicon based polymer, wherein the first coating layer and the second coating layer are light transmitting, wherein the first coating layer encapsulates the luminescent particle and the second coating layer encapsulates the first coating layer .