Water-Soluble Phosphor Monomolecular Compound for Organic Transistors

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Solution Overview

Problem

Existing organic phosphors face challenges in achieving desired wavelength emission and high photoluminescent efficiency, particularly in biotechnology applications where hydrophobicity is a limitation, and there is a need for enhanced performance in organic transistors and water splitting and hydrogen production systems.

Innovation Solution

A water-soluble phosphor monomolecular compound with a 1,5-naphthyridine-2,6-dione structure is developed, represented by specific chemical structural formulas, which enables wide wavelength emission and high photoluminescent efficiency, and is integrated into organic transistors and water splitting photocatalytic systems to improve their performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If conventional organic phosphors are used, then synthesis is simple and cost is low, but photoluminescent efficiency is low and wavelength control is difficult

Engineering Contradiction:

Improvesynthesis simplicityVSAvoidwavelength control precision

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent changes the molecular structure parameters of organic phosphors by introducing specific substituents (electron-donating or electron-withdrawing groups) at defined positions on the core structure. This allows precise control over emission wavelengths while maintaining synthetic feasibility through established organic chemistry methods.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates composite phosphor structures by combining core phosphor molecules with various functional substituents. These composite structures integrate multiple properties: the core provides photoluminescent function while substituents enable wavelength tuning, solubility control, and enhanced stability.

Inventive Principle:

Principle #40Composite materials

2Ease of manufacture

If conventional organic phosphors are used, then synthesis is simple, but photoluminescent efficiency is low

Engineering Contradiction:

Improvesynthesis simplicityVSAvoidphotoluminescent efficiency

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent optimizes molecular parameters including HOMO-LUMO energy gaps, electron density distribution, and molecular planarity through strategic substituent placement. These changes enhance photoluminescent quantum yield while keeping synthesis routes accessible through standard organic chemistry techniques.

Inventive Principle:

Principle #35Parameter changes

3Ease of manufacture

If conventional organic phosphors are used, then they are easy to synthesize, but they exhibit hydrophobicity that limits biotechnology application

Engineering Contradiction:

Improvesynthesis simplicityVSAvoidwater solubility

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The patent applies local quality modification by introducing hydrophilic substituents (such as carboxylic acid groups, hydroxyl groups, or ammonium groups) at specific locations on the phosphor molecule. This creates regions of different polarity within the molecule, enabling water solubility while preserving the hydrophobic core structure responsible for photoluminescent properties.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent creates amphiphilic composite structures combining hydrophobic phosphor cores with hydrophilic functional groups. This composite approach enables the molecule to function as a phosphor while also being compatible with aqueous biological environments.

Inventive Principle:

Principle #40Composite materials

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 high photoluminescent efficiency and hole mobility in organic transistors and increased catalyst efficiency in water splitting systems, with enhanced visible light absorbance and crystallinity, leading to improved performance across these applications.

Implementation Method 1

phosphors used in OLEDs or OLETs are required to emit light of a desired wavelength... having a high photoluminescent efficiency... capable of emitting light of a wide wavelengths and having a high photoluminescent efficiency

Methodology Applied

Scientific EffectPhotoluminescence: Photoluminescence

Implementation Method 2

water splitting and hydrogen production photocatalytic system using the same... having enhanced performance by using the monomolecular compound... increased catalyst efficiency in water splitting systems

Methodology Applied

Scientific EffectPhotocatalysis:

Implementation Method 3

enhanced visible light absorbance... high visible light absorbance

Methodology Applied

Scientific EffectVisible light absorbance: Absorption (EM radiation)

Implementation Method 4

hole mobility in organic transistors... having excellent performance... high hole mobility

Methodology Applied

Scientific EffectCharge transport:

Data Source

PatentUS20240409809A1Phosphor monomolecular compound, organic transistor using same, and water decomposition and hydrogen production photocatalytic system using same

Publication Date: 2024.12.12 SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION

AI summary

The present invention relates to a phosphor monomolecular compound, an organic transistor using same, and a water splitting and hydrogen production photocatalytic system using same. More specifically, the present invention comprises a water-soluble monomolecular compound including 1,5-naphthyridine-2,6-dione structure as a phosphor monomolecular compound.