Quantum dot films utilizing multi-phase resins

• US 9,680,068 B2
• Filed: 08/14/2014
• Issued: 06/13/2017
• Est. Priority Date: 08/14/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Nanoco Technologies Limited (Nanoco Group Plc)
• Inventors: Vo, Cong-Duan, Narrainen, Amilcar Pillay, Naasani, Imad
• Primary Examiner(s): KAUCHER, MARK S
• Application Number:
  US14/460,008
• Publication Number:
  US 20150047765A1
• Time in Patent Office: 1,034 Days
• CPC Class Codes: B32B 2037/243 Coating
• CPC Class Codes: B32B 2307/418 Refractive
• CPC Class Codes: B32B 2307/7242 Non-permeable
• CPC Class Codes: B32B 37/24 with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate B32B37/15 takes precedence
• CPC Class Codes: B82Y 20/00 Nanooptics, e.g. quantum optics or photonic crystals
• CPC Class Codes: C09K 11/02 Use of particular materials as binders, particle coatings or suspension media therefor
• CPC Class Codes: C09K 11/703 with zinc or cadmium
• CPC Class Codes: H01L 33/502 Wavelength conversion materials
• CPC Class Codes: H01L 33/504 Elements with two or more wavelength conversion materials
• CPC Class Codes: Y10T 156/10 Methods of surface bonding and/or assembly therefor

Abstract

Multi-phase polymer films containing quantum dots (QDs) are described herein. The films have domains of primarily hydrophobic polymer and domains of primarily hydrophilic polymer. QDs, being generally more stable within a hydrophobic matrix, are dispersed primarily within the hydrophobic domains of the films. The hydrophilic domains tend to be effective at excluding oxygen.

Claims

1. A method of preparing a film, the method comprising:

forming an emulsion comprising a first phase that comprises a first polymer and quantum dots and a second phase that comprises a second polymer;

depositing the emulsion between gas barrier sheets to form a film; and

curing the first and second polymers.