Quantum Dot Resin Composition for Fast Development and High Emission

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Solution Overview

Problem

Conventional curable resin compositions containing quantum dots suffer from low dispersibility, leading to decreased emission intensity and prolonged development speed, necessitating improvements in dispersion and development speed.

Innovation Solution

A curable resin composition comprising quantum dots, a compound with carboxy or thiol functional groups, a resin, a photopolymerizable compound, and a photopolymerization initiator, optimized to enhance dispersibility and development speed, resulting in improved emission intensity and film formation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If quantum dots are used as wavelength conversion material in conventional curable resin compositions, then the composition can form a cured film with wavelength conversion function, but the dispersibility of quantum dots in the composition is insufficient leading to decreased emission intensity

Engineering Contradiction:

Improveemission intensity of wavelength-converted lightVSAvoiddispersibility of quantum dots

Core Design Contradiction:

Illumination intensityVSStability of the object's composition

Solution Approach 1:

The patent introduces a specific compound (B-1) with carboxy group and either carboxy group or thiol group as an intermediary substance between quantum dots and the resin matrix. This compound acts as a surface treatment agent or dispersant that improves quantum dot dispersibility in the curable resin composition, directly resolving the contradiction between maintaining quantum dot functionality and achieving sufficient dispersibility for high emission intensity

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If conventional curable resin compositions are used, then the composition can be formulated with quantum dots, but the development speed is relatively long

Engineering Contradiction:

Improvedevelopment speedVSAvoidtime required for development

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent modifies the chemical composition parameters of the curable resin system by selecting specific photopolymerizable compounds (D) and photopolymerization initiators (E) with appropriate reactivity. This parameter optimization enables the cured film to achieve sufficient development speed without compromising the quantum dot dispersibility and emission intensity, thus resolving the time-related contradiction

Inventive Principle:

Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The composition achieves high development speed and emission intensity, forming a cured film with enhanced dispersibility and solvent resistance, suitable for display devices.

Implementation Method 1

a photopolymerizable compound (D); and a photopolymerization initiator (E)

Methodology Applied

Scientific EffectPhotopolymerization: Photopolymerisation

Implementation Method 2

a compound (B-1) having a first functional group and a second functional group, wherein the first functional group is a carboxy group and the second functional group is a carboxy group or a thiol group

Methodology Applied

Scientific EffectDispersion: Dispersion (of waves)

Data Source

PatentUS12528983B2Curable resin composition and display device

Publication Date: 2026.01.20 SUMITOMO CHEM CO LTD

AI summary

Provided is a curable resin composition containing quantum dots (A), a compound (B-1) having a first functional group and a second functional group, a resin (C), a photopolymerizable compound (D), and a photopolymerization initiator (E), wherein the first functional group is a carboxy group and the second functional group is a carboxy group or a thiol group.