Nanoco Technologies Limited

Samsung Electronics Co., Ltd.

Nanaco Technologies Ltd.

Cong-Duan Vo

Imad Naasani

Amilcar Pillay Narrainen

Abu Mohammad Imroz Ali

Ross Mera-Pirttijarvi

Emma Cherie Hogarth

Yien Ta

Alexandra Shannon

Elliot Stuart Poucher

Hao Pang

Khai Duong Quang Nguyen

Imad Naassani

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.

Quantum dot films utilizing multi-phase resins

Highly stable films containing semiconductor nanoparticles ('quantum dots') are prepared from resins containing a fast-curing inner phase having a high glass transition temperature (T) and certain inner phase/outer phase combinations. The resins may comprise an inner phase and outer phase (but may appear to be a single phase due to their homogeneous appearance when viewed using an optical microscope). The method provides a highly scalable and cost-effective procedure for preparing films that are resistant to light, elevated temperatures, moisture, and oxygen.

Highly stable quantum DOT-containing polymer films

The surfaces of nanoparticles (QDs) are modified with amphiphilic macromolecules, for example, amphiphilic copolymers. The surface modification renders the QDs more compatible with oxygen-excluding matrices, such as epoxy resin, polyurethane resin, polyester resins or any hydrophilic inorganic/organic hybrid resin such as (meth)acrylate-functionalized polyhedral oligomeric silsesquioxane (POSS).

Surface-modified nanoparticles

Highly stable quantum dot-containing polymer films

The addition of a chain transfer agent (CTA) or a reversible-addition fragmentation chain transfer agent (RAFT CTA) such as (2-(dodecyl-thiocarbonothioylthio)-2-methylpropionic acid) during the formation of quantum dot polymer films yields films characterized by high and stable quantum yields.

Methods for fabricating quantum dot polymer films

Multi-phase polymer films of quantum dots (QDs) and their use in light emitting devices (LEDs) are disclosed. The QDs are absorbed in a host matrix, which dispersed within an outer polymer phase. The host matrix is hydrophobic and is compatible with the surface of the QDs. The host matrix may also include a scaffolding material that prevents the QDs from agglomerating. The outer polymer is typically more hydrophilic and prevents oxygen from contacting the QDs.

Quantum dot compositions

Multi-phase polymer films of quantum dots (QDs) are disclosed. The QDs are absorbed in a host matrix, which dispersed within an outer polymer phase. The host matrix is hydrophobic and is compatible with the surface of the QDs. The host matrix may also include a scaffolding material that prevents the QDs from agglomerating. The outer polymer is typically more hydrophilic and prevents oxygen from contacting the QDs.

It has been discovered that certain silicon-containing, surface-modifying ligands can be used to make semiconductor nanoparticles (quantum dots) more compatible with polysiloxanes. Quantum dots dispersed in a polysiloxane matrix may be used, for example, in light-emitting devices to alter the emission spectrum of such devices.

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Manchester, United Kingdom

Cong-Duan Vo