Patent ID: 11912914
Assignee: LUMILEDS, LLC
Field: Surface technology, coating (Chemistry)
Classification: CPC C  F  H | IPC C  F  H

Claim 18:
19. The luminescent material according to claim 15, wherein the luminescent core comprises a material selected from a group consisting of (i) the SrLiAl3N4:Eu2+ class, and (ii) the SrLi2Al1.995Si0.005O1.995N2.005:Eu2+ class, wherein the main sol-gel coating layer comprises SiO2, and one or more layers of the multilayer comprise one or more of Ta2O5, HfO2, TiO2 and ZrO2 and wherein one or more layers of the multilayer comprise Al2O3, wherein the layer contacting the main sol-gel coating layer consist of one or more metal oxides selected from a group of HfO2, ZrO2, TiO2, Ta2O5.