Ferroelectric Fluorescent Self-Assembly Compound for Organic Electronics

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Solution Overview

Problem

Conventional fluorescent materials lack ferroelectricity and piezoelectricity, limiting their ability to exhibit synesthesia characteristics, and studies on self-assembling ferroelectrics often compromise fluorescent properties due to quenching effects.

Innovation Solution

A ferroelectric fluorescent self-assembly compound is introduced, featuring a specific skeleton and functional groups capable of self-assembly, which enhances luminescence, ferroelectricity, and piezoelectricity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a mixture of fluorescent material and ferroelectrics is used, then ferroelectricity is improved, but uniform dispersion is poor and piezoelectricity is insufficient

Engineering Contradiction:
ImproveferroelectricityVSAvoiduniform dispersion
Core Design Contradiction:
ReliabilityVSStability of the object's composition

Solution Approach 1:

The patent merges fluorescent and ferroelectric functions into a single compound by introducing ferrocene groups to fluorescent material skeletons (e.g., pyrene, perylene, anthracene cores). This molecular-level combination ensures uniform dispersion while maintaining both fluorescent emission and ferroelectric polarization properties, eliminating the phase separation issues of physical mixtures.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The invention creates composite functional materials by integrating ferrocene moieties with fluorescent chromophores. The resulting hybrid compounds exhibit synergistic properties where the ferrocene provides ferroelectricity and the fluorescent core provides luminescence, achieving both uniform dispersion and enhanced piezoelectric response.

Inventive Principle:
Principle #40Composite materials

2Reliability

If self-assembling ferroelectrics are used, then ferroelectricity is increased, but fluorescent property is deteriorated due to quenching effect

Engineering Contradiction:
ImproveferroelectricityVSAvoidfluorescent property
Core Design Contradiction:
ReliabilityVSIllumination intensity

Solution Approach 1:

The patent applies local quality by positioning ferrocene groups at specific locations on the fluorescent molecular skeleton (e.g., at terminal positions of aromatic rings). This spatial arrangement allows the ferrocene to provide ferroelectricity through self-assembly while maintaining adequate distance from the fluorescent core to minimize quenching, preserving luminescence properties.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The invention optimizes the molecular structure by adjusting parameters such as the type of fluorescent core (pyrene, perylene, anthracene), the number and position of ferrocene groups, and the length of connecting linkers. These parameter changes balance the ferroelectric self-assembly tendency with fluorescent emission efficiency, reducing quenching while enhancing ferroelectricity.

Inventive Principle:
Principle #35Parameter changes

3Illumination intensity

If conventional fluorescent material is used, then luminescence is achieved, but ferroelectricity and piezoelectricity are lacking

Engineering Contradiction:
ImproveluminescenceVSAvoidferroelectricity
Core Design Contradiction:
Illumination intensityVSReliability

Solution Approach 1:

The patent creates multi-functional compounds where a single molecule simultaneously provides luminescence (from the fluorescent core), ferroelectricity (from ferrocene groups), and piezoelectricity (from the combined structure). This universal design eliminates the need for separate functional materials and their associated interface problems.

Inventive Principle:
Principle #6Universality (Multi-functionality)

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 compound achieves improved light-emitting properties, ferroelectricity, and piezoelectricity, allowing for the development of organic electronic elements with enhanced optical and electrical characteristics.

Implementation Method 1

a specific skeleton and a specific substituent capable of self-assembly are introduced

Methodology Applied
Scientific EffectSelf-assembly: Self-Assembly

Implementation Method 2

fluorescence refers to an emitted light or an emission phenomenon, when a material absorbing energy is transferred from an excited electronic state to an electronic state having lower energy

Methodology Applied
Scientific EffectFluorescence: Fluorescence

Implementation Method 3

ferroelectricity means a phenomenon in which insulators or dielectrics spontaneously have polarization without an external electric field

Methodology Applied
Scientific EffectFerroelectricity:

Implementation Method 4

since ferroelectrics exhibit a piezoelectric effect to generate electricity when pressure is applied

Methodology Applied
Scientific EffectPiezoelectric effect: Piezoelectric Effect

Data Source

PatentUS12325693B2Ferroelectric fluorescent self-assembly compound and organic electronic element including the same
Publication Date: 2025.06.10 IND ACADEMIC COOP FOUND YONSEI UNIV
  • US12325693B2 patent drawing
  • US12325693B2 patent drawing
  • US12325693B2 patent drawing

AI summary

Provided are a ferroelectric fluorescent self-assembly compound and an organic electronic element including the same. The organic electronic element of the present invention includes the ferroelectric fluorescent self-assembly compound to which a specific skeleton and a specific function group are introduced, thereby having excellent light-emitting property, ferroelectricity, and piezoelectricity.