Non-fullerene Organic Semiconductor Near-Infrared Detection

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Solution Overview

Problem

Current organic semiconductor materials face limitations in near-infrared light absorption, with poor performance beyond 1000 nm and reliance on environmentally harmful halogen-containing solvents in processing, which hampers their application in advanced optoelectronic devices like organic photodetectors for intelligent driving and unmanned aerial vehicles.

Innovation Solution

Development of an n-type organic semiconducting compound with a specific molecular structure that allows for excellent responsivity beyond 1000 nm, using environmentally friendly solvents and enabling efficient solution processing, thereby enhancing device performance and manufacturing scalability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If traditional fullerene acceptor materials are used, then device structure is simple and synthesis is easy, but light absorption range is limited and cannot be adjusted to near-infrared region

Engineering Contradiction:

Improvelight absorption rangeVSAvoidmolecular structure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent changes the molecular structure parameters of acceptor materials by replacing traditional fullerene cores with non-fullerene structures (such as ITIC, IDIC derivatives) and adjusting electron-withdrawing units to extend light absorption into the near-infrared region while maintaining processability

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates composite donor-acceptor systems by combining conjugated polymer donors with non-fullerene acceptors, where the complementary absorption spectra of donor and acceptor materials achieve broadened overall light absorption range from visible to near-infrared

Inventive Principle:

Principle #40Composite materials

2Ease of manufacture

If conventional halogen-containing solvents are used for processing, then solubility and processability are improved, but environmental harm increases

Engineering Contradiction:

ImproveprocessabilityVSAvoidenvironmental harm

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The patent changes the solvent system from halogen-containing solvents (chloroform, dichlorobenzene) to halogen-free alternatives (toluene, o-xylene, chlorobenzene-free formulations) by modifying processing conditions and optimizing material-solvent interactions to maintain solution processability without environmental harm

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent converts the challenge of using environmentally friendly solvents into an opportunity by demonstrating that non-halogen solvents can achieve comparable or superior device performance when combined with optimized non-fullerene acceptor materials and processing conditions

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Measurement precision

If organic semiconductor materials are designed for visible light absorption, then detection efficiency in visible range is high, but performance beyond 1000 nm deteriorates

Engineering Contradiction:

Improvedetection efficiencyVSAvoidwavelength range

Core Design Contradiction:

Measurement precisionVSAdaptability or versatility

Solution Approach 1:

The patent changes the optical parameters of semiconductor materials by extending conjugation length, introducing electron-deficient units, and optimizing HOMO-LUMO energy levels to redshift absorption spectra from visible range into near-infrared region beyond 1000 nm while maintaining high detection efficiency

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates dynamically adjustable light absorption characteristics by developing tunable non-fullerene acceptor structures where absorption range and energy levels can be optimized for specific application requirements through systematic molecular design

Inventive Principle:

Principle #15Dynamics

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 new organic semiconducting compound demonstrates improved light absorption and detectivity in the near-infrared range, reducing dark current and enabling higher detectivity, while using non-halogen solvents, thus addressing environmental concerns and enhancing device efficiency.

Implementation Method 1

the new organic semiconducting compound demonstrates improved light absorption and detectivity in the near-infrared range

Methodology Applied

Scientific EffectLight absorption: Absorption (EM radiation)

Implementation Method 2

Organic photodetector (OPD) is an emerging field of organic optoelectronics in recent years. Such devices can detect various light sources in the environment

Methodology Applied

Scientific EffectPhotoelectric effect: Photoelectric Effect

Data Source

PatentUS20240122055A1Organic semiconducting compound and organic optoelectronic devices using the same

Publication Date: 2024.04.11 RAYNERGY TEK INC

AI summary

The present invention relates to an organic semiconducting compound and organic optoelectronic components using the same. The organic semiconducting compound own a novel chemical structure. By using the organic semiconducting compound to prepare organic optoelectronic compounds, environmentally friendly non-halogen solvent can be used. In addition, the photoresponsivity and detectivity are excellent in the near-infrared region.