Photoelectric Conversion Material for Fast, High-Yield Imaging Elements

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Solution Overview

Problem

Existing photoelectric conversion elements, particularly imaging elements, face challenges in achieving both high response speed and external quantum efficiency.

Innovation Solution

Incorporating a layer containing a photoelectric conversion element material represented by specific chemical formulas, such as (1) and (3), which includes a condensed ring aromatic hydrocarbon group and electron-withdrawing groups, to enhance electron transport and hole blocking properties.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If conventional photoelectric conversion elements are used, then manufacturing simplicity is maintained, but response speed and external quantum efficiency are insufficient

Engineering Contradiction:

Improveresponse speedVSAvoidmaterial structure complexity

Core Design Contradiction:

SpeedVSDevice complexity

Solution Approach 1:

The patent modifies the chemical parameters of the hole blocking layer material by introducing specific condensed ring aromatic hydrocarbon groups (16-40 carbon atoms) and electron-withdrawing groups, changing the molecular structure parameters to achieve both high response speed and external quantum efficiency while maintaining manufacturing feasibility

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite material system combining photoelectric conversion layer and hole blocking layer with specific molecular structures, where the hole blocking layer contains compounds with condensed ring aromatic hydrocarbon groups and electron-withdrawing groups, achieving superior performance without excessive complexity

Inventive Principle:

Principle #40Composite materials

2Reliability

If hole blocking layer with pyrimidine or triazine derivatives is used, then hole blocking function is achieved, but response speed and external quantum efficiency are limited

Engineering Contradiction:

Improveexternal quantum efficiencyVSAvoidmaterial synthesis complexity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent changes the chemical composition parameters by replacing conventional pyrimidine/triazine derivatives with compounds containing condensed ring aromatic hydrocarbon groups (16-40 carbon atoms) and electron-withdrawing groups, achieving higher external quantum efficiency while maintaining manufacturability through established synthesis methods

Inventive Principle:

Principle #35Parameter changes

3Power

If material with high electron transport capability is used, then external quantum efficiency improves, but hole blocking capability may be compromised

Engineering Contradiction:

Improveelectron transport capabilityVSAvoidhole blocking capability

Core Design Contradiction:

PowerVSReliability

Solution Approach 1:

The patent applies local quality by designing the hole blocking layer material with specific molecular regions: condensed ring aromatic hydrocarbon groups (16-40 carbon atoms) providing electron transport capability and electron-withdrawing groups providing hole blocking capability, achieving both functions simultaneously in the same material

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent creates a universal hole blocking layer material that performs multiple functions: electron transport, hole blocking, and maintaining structural stability, achieved through the dual-functional molecular design combining condensed ring aromatic hydrocarbon groups with electron-withdrawing groups

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 solution results in photoelectric conversion elements with improved response speed and external quantum yield, providing a material that maintains stability and efficiency even under annealing conditions.

Implementation Method 1

Photoelectric conversion elements are widely utilized in solar cells, photosensors, image sensors, and the like

Methodology Applied

Scientific EffectPhotoelectric conversion: Photoelectric Effect

Implementation Method 2

a layer containing a photoelectric conversion element material represented by formula (1) below...EWG represents an electron-withdrawing group...enhance electron transport and hole blocking properties

Methodology Applied

Scientific EffectElectron transport: Conduction (electrical)

Data Source

PatentUS20260090266A1Photoelectric conversion element, imaging element, photoelectric conversion element material, and compound

Publication Date: 2026.03.26 TOSOH CORP

AI summary

Provided are a photoelectric conversion element and an imaging element which are excellent in response speed and exhibit a high external quantum yield, and a photoelectric conversion element material that contributes to production of these elements. An imaging photoelectric conversion element (100) includes a layer containing a photoelectric conversion element material represented by formula (1) below, where EWG represents an electron-withdrawing group, L represents an aromatic hydrocarbon group having 6 to 30 carbon atoms, n represents 1 to 8, k represents 0 to 2, and p represents 1 to 8, where p is 1 if k is 0.