US Patent 8004175 - Light emitting material including sodium and metal nanoparticles

http://www.freepatentsonline.com/8004175.html

This patent from Mitsubishi Heavy Industries teaches a way to improve the brightness of nanoparticle-based electroluminescense by using a sodium base material. Claim 1 reads:

1. A light-emitting material comprising:

a light-emitting base material; and

metallic nanoparticles added thereto,

wherein the light-emitting base material is sodium, the metallic nanoparticles are uniformly dispersed in the light-emitting base material, and the metallic nanoparticles are selected from the group consisting of titanium ultrafine particles, silver ultrafine particles, and stainless-steel ultrafine particles.