Quantum Dot Ligand Complex for Resin-Compatible Optical Films

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Solution Overview

Problem

Conventional liquid crystal displays require a backlight due to their non-self emissive nature and have limitations in wide color reproducibility, while quantum dots face compatibility issues with organic resins in patterning processes, hindering excellent color characteristics.

Innovation Solution

A semiconductor nanoparticle-ligand complex with a specific ligand structure is developed, enhancing compatibility with organic resins, and a photosensitive resin composition is formulated to create an optical film with improved color characteristics, which is used in electroluminescent diodes and electronic devices.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If quantum dots are used to convert blue light into different colors, then color characteristics are improved, but compatibility with organic resins in patterning process deteriorates

Engineering Contradiction:

Improvecolor characteristicsVSAvoidcompatibility with organic resins

Core Design Contradiction:

Manufacturing precisionVSAdaptability or versatility

Solution Approach 1:

A ligand exchange process is employed where native ligands on quantum dot surfaces are replaced with resin-compatible ligands. This intermediary chemical transformation enables quantum dots to be compatible with organic resins while maintaining their optical properties for color conversion

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The surface chemistry parameters of quantum dots are modified through ligand exchange. By changing the ligand composition and surface properties, the quantum dots achieve compatibility with organic resins without altering their core optical characteristics for color conversion

Inventive Principle:

Principle #35Parameter changes

2Manufacturing precision

If quantum dot content is increased to enhance color characteristics, then color quality is improved, but patterning processability deteriorates

Engineering Contradiction:

Improvecolor characteristicsVSAvoidpatterning processability

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The surface properties and chemical composition parameters of quantum dots are modified through ligand exchange. This enables higher quantum dot content to be incorporated into the resin while maintaining proper dispersion and patterning processability

Inventive Principle:

Principle #35Parameter changes

3Stability of the object's composition

If conventional ligands are used on quantum dot surfaces, then quantum dot stability is maintained, but compatibility with organic resins deteriorates

Engineering Contradiction:

Improvequantum dot stabilityVSAvoidcompatibility with organic resins

Core Design Contradiction:

Stability of the object's compositionVSAdaptability or versatility

Solution Approach 1:

The ligand exchange process acts as an intermediary step where stable native ligands are replaced with resin-compatible ligands. This maintains quantum dot stability while achieving compatibility with organic resins for patterning applications

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

Hybrid ligand structures are created that combine the stability-providing characteristics of native ligands with the resin-compatibility characteristics of organic ligands, achieving both stability and compatibility simultaneously

Inventive Principle:

Principle #40Composite materials

Data Source

PatentUS12504558B2Semiconductor-nanoparticle-ligand complex, preparation method therefor, photosensitive resin composition, optical film, electroluminescent diode and electronic device

Publication Date: 2025.12.23 DUK SAN NEOLUX

AI summary

Embodiments of the present invention relate to a semiconductor-nanoparticle-ligand complex, a preparation method therefor, a photosensitive resin composition, an optical film, an electroluminescent diode and an electronic device, and, more specifically, can provide: a semiconductor-nanoparticle-ligand complex comprising a ligand represented by chemical formula 1, and thus has excellent compatibility; an optical film with excellent efficiency; an electroluminescent diode; and an electronic device.