Optical composition

Patent metadata

Field	Value
Publication number	US-9556292-B2
Application number	US-201314440710-A
Country	US
Kind code	B2
Filing date	Dec 17, 2013
Priority date	Dec 20, 2012
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

The present invention aims to reduce excess scattering in light emitting arrangements. A composition comprising a transparent matrix comprising an anionic organic moiety, and metal cations dispersed in the matrix is disclosed. The anionic organic moiety and the metal cations form an organometallic complex, and wherein the metal cations are capable of forming transparent nano-crystals upon contact with an agent comprising at least one element selected from the group consisting of sulfur and selenium. Also an optical composition comprising a transparent matrix comprising an organic moiety residue, and unmodified nanocrystals is disclosed. Further, a method of preparing an optical composition comprising the steps of: providing a transparent matrix comprising an anionic organic moiety; dispersing metal cations into the matrix; and contacting the organometallic complex with an agent in order to in situ convert at least part of the metal cations into transparent nanocrystals.
Preferably the matrix is a silicone or a polysiloxane and silicone rubber mixture.

First claim

The invention claimed is:

1. A composition comprising:
a transparent matrix comprising an anionic organic moiety,
metal cations dispersed in the transparent matrix, and
transparent nanocrystals converted in situ from said metal cations upon contact of said metal cations with an agent comprising at least one element selected from the group consisting of sulfur and selenium;
wherein said anionic organic moiety and said transparent nanocrystals form an organometallic complex, and
wherein the transparent matrix is a silicone or a silicone derivative comprising at least one of a polysiloxane and silicone rubber.

2. A composition according to claim 1 , wherein the organometallic complex is uniformly dispersed in the matrix.

3. A composition according to claim 1 , wherein the matrix comprises a polymer and the anionic organic moiety is an anionic organic side group of said polymer.

4. A composition according to claim 1 , wherein said metal ion is selected from the group consisting of zinc ions, cadmium ions, and iron ions.

5. A method of preparing an optical composition comprising the steps of:
a) providing a composition according to claim 1 ,
c) contacting the organometallic complex with an agent comprising at least one element selected from the group consisting of sulfur and selenium, in order to in situ convert at least part of the metal cations into transparent nanocrystals.

6. A method of preparing an optical composition comprising the steps of:
a) providing a transparent matrix comprising an anionic organic moiety, wherein the transparent matrix is a silicone or a silicone derivative comprising at least one of a polysiloxane and silicone rubber,
b) dispersing metal cations into the matrix, such that the anionic organic moiety and the metal cations form an organometallic complex,
c) converting in situ the metal cations into transparent nanocrystals by contacting the metal cations in the organometallic complex with an agent comprising at least one element selected from the group consisting of sulfur and selenium.

7. The method according to claim 6 , wherein step c) is carried out until a refractive index of the optical composition corresponding to 100% conversion of the organometallic complex is achieved.

8. The method according to claim 6 , further comprising a step of cross-linking the matrix by heat or high energy radiation selected from the group consisting of: UV, gamma rays, and electrons.

Assignees

• Philips Lighting Holding Bv

Inventors

• Hikmet Rifat Ata Mustafa
• Van Bommel Ties

Classifications

• C08K3/30

  Sulfur-, selenium- or tellurium-containing compounds · CPC title

• H01L33/58

  Electricity · mapped topic

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• B82Y20/00

  Nanooptics, e.g. quantum optics or photonic crystals · CPC title

• C08G77/398

  containing boron or metal atoms · CPC title