Light-Emitting Composition Water Vapor Durability

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Solution Overview

Problem

Compositions containing semiconductor fine particles lack sufficient durability against water vapor, as reported in Non-Patent Documents 1 and 2.

Innovation Solution

A light-emitting composition comprising semiconductor fine particles and a compound represented by Formula (X) or its modified product, where Y is a direct bond, oxygen, or sulfur, with specific alkyl, cycloalkyl, or unsaturated hydrocarbon groups, and a polymer or polymerizable compound, providing enhanced durability against water vapor.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If semiconductor fine particles are coated with aminopropyltriethoxysilane or tetramethoxysilane, then the composition can be formed, but the durability with respect to water vapor is insufficient

Engineering Contradiction:

Improvedurability against water vaporVSAvoidwater vapor degradation

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies composite materials by combining semiconductor fine particles with a specific organic compound containing hydrophobic groups (Formula X). This composite structure provides both the light-emitting functionality of the semiconductor particles and the water vapor resistance of the hydrophobic organic compound, resolving the contradiction between formability and durability against water vapor.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent changes the chemical parameters of the coating material by specifying a compound with particular structural features (Formula X) including hydrophobic alkyl, cycloalkyl, or unsaturated hydrocarbon groups. This parameter change in the molecular structure of the coating material provides enhanced water vapor barrier properties while maintaining the composition's formability and light-emitting characteristics.

Inventive Principle:

Principle #35Parameter changes

2Stability of the object's composition

If a coating material is applied to semiconductor fine particles, then stability is improved, but water vapor durability remains insufficient

Engineering Contradiction:

ImprovestabilityVSAvoidwater vapor durability

Core Design Contradiction:

Stability of the object's compositionVSReliability

Solution Approach 1:

The patent applies local quality by designing a coating material with specific local chemical characteristics - the compound in Formula X contains hydrophobic groups positioned to provide water vapor resistance at the particle surface. This localized functional design ensures both stability of the semiconductor particles and improved water vapor durability simultaneously.

Inventive Principle:

Principle #3Local quality

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 exhibits high durability against water vapor, maintaining light-emitting properties and stability in wet environments, suitable for films, laminated structures, light-emitting devices, and displays.

Implementation Method 1

R16 is an alkyl group having 3 to 20 carbon atoms, a cycloalkyl group having 3 to 30 carbon atoms, or an unsaturated hydrocarbon group having 2 to 20 carbon atoms

Methodology Applied

Scientific EffectHydrophobic interaction: Hydrophobe

Data Source

PatentUS11306243B2Composition, film, multilayer structure, light emitting device and display

Publication Date: 2022.04.19 SUMITOMO CHEM CO LTD

AI summary

A light-emitting composition including: semiconductor fine particles as component (1); and a compound represented by Formula (X) or a modified product thereof as component (2).