Patent ID: 9719923
Date: 2017-08-01
CPC Classifications: C09K,G01N

Claim:
1. A method for increasing radiative decay and/or increased emission intensity, the method comprising: providing a substrate having a surface, wherein the substrate is coated with a metallic material that exhibits surface plasmons on excitation, wherein the metallic material is silver, gold, copper, and combinations thereof and wherein the metallic material is in the form of metallic islands, shaped metallic nanostructures, or metallic colloids; coating the metallic material with a SiOx layer, wherein the SiOx layer is about 1 nm thick; coupling a long lived luminescent compound selected from a delayed fluorescent compound or phosphorescent compound to the SiOx layer covering the metallic material, wherein the long lived luminescent compound coupled to the SiOx layer is positioned at a distance from the metallic material of about 1 nm that provides for coupling interaction between the long lived luminescent compounds and excited metallic surface plasmons; and irradiating the long lived luminescent compound in an amount sufficient to excite the long lived luminescent compound causing an interaction with the surface plasmons of the metallic material thereby increasing radiative decay and/or increased singlet and triplet emission intensity of the long lived luminescent compound.