Polyaniline Hole-Trapping Layer Composition for Organic Photoelectric Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Organic photoelectric conversion devices face challenges in mass production due to the complexity and high cost of vacuum deposition processes, and the use of aqueous dispersions like PEDOT/PSS, which are prone to solids agglomeration, equipment clogging, and have poor heat resistance and moisture control issues.
Innovation Solution
A composition for a hole-collecting layer using polyaniline derivatives with specific electron-donating substituents and an electron-accepting dopant, such as Brønsted acids, to form a uniform thin film with high solubility in polar solvents, enhancing hole transportability and durability, and incorporating alkoxysilane for solvent resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vacuum deposition process is used to form hole-collecting layer, then device performance is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent replaces the mechanical vacuum deposition process with a chemical solution-based coating process. The hole-collecting layer is formed by coating a solution containing the polyaniline derivative and dopant, followed by drying, eliminating the need for complex vacuum deposition equipment and processes while maintaining device performance.
Solution Approach 2:
The patent changes the physical and chemical parameters of the hole-collecting layer materials by using specially designed polyaniline derivatives with specific substituents and appropriate dopants. This allows the materials to be processed in solution form rather than requiring vacuum deposition, simplifying manufacturing while preserving functional performance.
2Ease of manufacture
If aqueous dispersion of PEDOT/PSS is used for hole-collecting layer, then ease of manufacture is improved, but moisture control and device durability worsen
Solution Approach 1:
The patent changes the chemical composition parameters by replacing conventional PEDOT/PSS aqueous dispersions with polyaniline derivatives that have specific hydrophobic substituents. These modified polymers maintain solution processability while providing inherent moisture resistance, improving device durability without sacrificing ease of manufacture.
Solution Approach 2:
The patent creates a composite material system combining polyaniline derivatives with specific dopants. This composite provides both the ease of solution-based manufacturing and improved moisture resistance, resolving the contradiction between ease of manufacture and device durability.
3Ease of manufacture
If aqueous dispersion is used for coating, then ease of manufacture is improved, but solids agglomeration and equipment clogging occur
Solution Approach 1:
The patent changes the molecular structure parameters of the hole-collecting layer materials by incorporating specific substituents on the polyaniline backbone. These structural modifications improve solubility and prevent solids agglomeration in solution, enabling uniform film formation through simple coating processes without equipment clogging.
4Reliability
If conventional hole-collecting layer materials are used, then hole transport is achieved, but heat resistance and solvent resistance are poor
Solution Approach 1:
The patent develops a composite material system using polyaniline derivatives combined with specific dopants. This composite maintains excellent hole transportability while providing enhanced heat resistance and solvent resistance, resolving the contradiction between functional performance and environmental stability.
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 enables the production of organic photoelectric conversion devices with high photoelectric conversion efficiency, improved durability, and reduced current leakage, suitable for both solar cells and image sensors, while being cost-effective and suitable for inverted stack-type devices.
Implementation Method 1
exhibit a high hole transportability
Implementation Method 2
by adding an electron-accepting dopant substance composed primarily of a highly oxidizing Brønsted acid, the HOMO level of the resulting thin film can be controlled
Implementation Method 3
by adding a suitable type and amount of alkoxysilane material to the solution, electron-blocking properties can be imparted to the resulting thin film and, at the same time, strong solvent resistance and water resistance can be imparted
Implementation Method 4
When the solution is formed into a thin film by a coating operation
Data Source
AI summary
Provided is a composition for a hole trapping layer of an organic photoelectric conversion element, such composition: containing a solvent and a charge-transporting substance comprising a polyaniline derivative represented by formula (1); and providing a thin film that is suitable as a hole trapping layer of an organic photoelectric conversion element and can also be used to produce an inverse lamination type organic photoelectric conversion element.{R1-R6 each independently denote a hydrogen atom or the like, but one of the R1-R4 groups is a sulfonic acid group, one or more of the other R1-R4 groups is an alkoxy group having 1-20 carbon atoms, a thioalkoxy group having 1-20 carbon atoms, an alkyl group having 1-20 carbon atoms, an alkenyl group having 2-20 carbon atoms, an alkynyl group having 2-20 carbon atoms, a haloalkyl group having 1-20 carbon atoms, an aryl group having 6-20 carbon atoms or an aralkyl group having 7-20 carbon atoms, and m and n are numbers that satisfy the relationships 0≤m≤1, 0≤n≤1 and m+n=1.}