P-type Organic Semiconductor for Infrared Detection

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Solution Overview

Problem

Conventional organic semiconducting compounds face challenges in achieving good infrared light response beyond 1000 nm, with poor optoelectronic performance and stability due to easy molecule stacking and the use of halogenated solvents, which affects environmental sustainability and component longevity.

Innovation Solution

A new p-type organic semiconducting compound with a specific chemical structure, allowing for wide wavelength light response from ultraviolet to near-infrared, low dark current density, and improved solubility in environmentally friendly solvents, enabling efficient mass production and reduced stacking effects.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If conventional organic semiconducting compounds are used to achieve infrared light response beyond 1000 nm, then the absorption range can be extended, but the optoelectronic performance and stability deteriorate due to poor response and easy molecule stacking

Engineering Contradiction:

Improveabsorption rangeVSAvoidoptoelectronic performance and stability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies local quality by designing specific functional groups at different positions of the semiconducting compound molecule. Electron-withdrawing groups (A0, A1, A2) are placed at specific positions to enhance infrared absorption beyond 1000 nm, while electron-donating groups (Ar0, Ar1, Ar2) are positioned to maintain molecular stability and prevent stacking. This localized functional group arrangement allows different parts of the molecule to perform specialized functions, achieving both extended absorption range and maintained stability.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent creates a composite molecular structure combining multiple functional groups with complementary properties. The compound integrates electron-withdrawing groups (for infrared absorption), electron-donating groups (for stability), and conjugated pi-systems (for charge transport) into a single unified molecular architecture. This composite approach allows the material to simultaneously achieve extended absorption range beyond 1000 nm, good optoelectronic response, and resistance to molecule stacking.

Inventive Principle:

Principle #40Composite materials

2Ease of manufacture

If halogenated solvents are used during wet processing of organic semiconducting materials, then the solubility and processability are improved, but the environmental impact worsens due to negative effects on the environment

Engineering Contradiction:

Improvesolubility and processabilityVSAvoidenvironmental impact

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The patent applies parameter changes by modifying the chemical structure of the semiconducting compound to enhance its solubility in non-halogenated solvents. The introduction of specific functional groups and molecular design features changes the solubility parameters of the material, allowing it to be processed with environmentally friendly solvents while maintaining good processability and film formation characteristics.

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If P3HT polymer molecules are used in organic photodetectors, then the absorption range can be achieved, but the dark current density increases due to easy stacking of molecules

Engineering Contradiction:

Improveabsorption rangeVSAvoiddark current density

Core Design Contradiction:

Adaptability or versatilityVSObject-generated harmful factors

Solution Approach 1:

The patent applies preliminary anti-action by designing the molecular structure with steric hindrance features and optimized intermolecular spacing before the stacking problem occurs. The specific arrangement of functional groups and molecular geometry creates built-in resistance to excessive molecule stacking, preventing the formation of crystalline structures that would increase dark current density, while still maintaining adequate absorption range.

Inventive Principle:

Principle #9Preliminary anti-action

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 compound provides enhanced infrared light response, improved electrical performance, and stability, along with reduced environmental impact through the use of non-halogenated solvents, addressing the limitations of existing materials in photodetectors.

Implementation Method 1

wide absorption range, larger absorption coefficient

Methodology Applied

Scientific EffectLight absorption: Absorption (EM radiation)

Implementation Method 2

organic photodetector (OPD)... excellent response in the infrared region

Methodology Applied

Scientific EffectPhotoelectric effect: Photoelectric Effect

Data Source

PatentUS11925101B2Organic semiconducting compound and the organic photoelectric components using the same

Publication Date: 2024.03.05 RAYNERGY TEK INC

AI summary

An organic semiconducting compound and an organic photoelectric component containing the same are provided. The organic semiconducting compound has a novel chemical structure to make the organic semiconducting compound have good response to the infrared light. The organic semiconducting compound can be applied to the organic photoelectric components such as organic photodetector (OPD), organic photovoltaic (OPV) cell, and organic field-effect transistor (OFET). Thus, the organic photoelectric components have better light absorption range and photoelectric response while in use.