Organic and inorganic light active devices and methods for making the same

• US 7,799,369 B2
• Filed: 06/14/2006
• Issued: 09/21/2010
• Est. Priority Date: 11/19/2002
• Status: Expired due to Fees

• Current Assignee: John J Daniels
• Original Assignee: John J Daniels
• Inventors: Daniels, John J.
• Primary Examiner(s): Meeks; Timothy H
• Assistant Examiner(s): Lin; James
• Application Number:
  US11/453,627
• Publication Number:
  US 20070014916A1
• Time in Patent Office: 1,560 Days
• Field of Search: 427/66, 427/256, 427/286, 427/510, 427/466, 427/472, 427/474
• US Class Current: 427/66
• CPC Class Codes: B82Y 20/00 Nanooptics, e.g. quantum optics or photonic crystals
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: C09K 2211/14 Macromolecular compounds
• CPC Class Codes: H05B 33/10 Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
• CPC Class Codes: H05B 33/20 characterised by the chemical or physical composition or the arrangement of the material in which the electroluminescent material is embedded
• CPC Class Codes: H10K 2102/331 Nanoparticles used in non-emissive layers, e.g. in packaging layer
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 50/14 Carrier transporting layers
• CPC Class Codes: H10K 50/182 OLED comprising a fiber structure
• CPC Class Codes: H10K 50/19 Tandem OLEDs
• CPC Class Codes: H10K 50/80 Constructional details
• CPC Class Codes: H10K 59/17 Passive-matrix OLED displays
• CPC Class Codes: H10K 59/32 Stacked devices having two or more layers, each emitting at different wavelengths
• CPC Class Codes: H10K 71/16 using physical vapour deposition [PVD], e.g. vacuum deposition or sputtering

Abstract

A light active device includes a semiconductor particulate dispersed within a carrier material. A first contact layer is provided so on application of an electric field charge carriers having a polarity are injected into the semiconductor particulate through the carrier material. A second contact layer is provided so on application of the electric field to the second contact layer charge carriers having an opposite polarity are injected into the semiconductor particulate through the carrier material. The semiconductor particulate comprises at least one of an organic and an inorganic semiconductor. The semiconductor particulate may comprise an organic light active particulate. When constructed as a light emitting device, an electric field applied to the semiconductor particulate through the carrier causes charge carriers of opposite polarity to be injected into the semiconductor particulate. The charge carriers combine to form carrier pairs which decay and give off light.

Claims

1. A method for making a light active device, comprising:

providing a mixture of light active material and a monomer in a first region and a second region;

forming chains of the light active material in the first region;

curing the monomer to form a polymer in the first region and in the second region to lock the chains of the light active material in the first region;

wherein the light active material comprises electro-statically active microcapsules comprising an ILED material encapsulated within a polymer shell; and

wherein the chains of the electro-statically active microcapsules are formed by application of an electric field to the mixture of the light active material and the monomer.

2. The method of claim 1, further comprising providing a first electrode and a second electrode having the polymer and the light active material disposed there-between, wherein the chains of the electro-statically active_microcapsules form pixels between the first electrode and second electrode.

3. A method of making a light active device according to claim 1 further comprising providing a first electrode and a second electrode having the polymer and the light active material disposed there-between.

4. A method for making a light active device according to claim 3;

wherein the ILED material emits light when a voltage is applied to the first electrode and the second electrode.