Copper Complex Dopant for Organic Electronics
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing organic electronic components, such as organic light-emitting diodes, face challenges in charge carrier injection and transport efficiency, which affect their conductivity and lifetime, and current dopants are costly and inefficient in modifying the appearance of these components in the switched-off state.
Innovation Solution
A copper complex with ligands containing an aryloxy and iminium group is used as a p-dopant in hole transport materials, enhancing hole conductivity and allowing for color modification of organic electronic components without altering electrical conductivity, and a process for producing this dopant is developed, which is cost-effective and simple.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional dopants are used to increase conductivity, then charge carrier transport is improved, but production costs increase
Solution Approach 1:
The patent changes the chemical parameters of the dopant by using copper complexes with specific ligands (aryloxy and iminium groups) instead of conventional expensive dopants. This parameter change in dopant composition achieves high conductivity enhancement while maintaining cost-effectiveness through the use of abundant copper metal and synthetically accessible ligands.
Solution Approach 2:
The invention employs copper complexes as dopants that are significantly cheaper than conventional dopants like F4-TCNQ or Mo(CO)6. The copper-based dopants provide comparable or superior doping efficiency at a fraction of the cost, making the organic electronic components more economically viable for mass production.
2Reliability
If doping is used to increase conductivity, then charge carrier transport is improved, but the appearance modification capability is insufficient
Solution Approach 1:
The copper complex dopant serves multiple functions simultaneously: it acts as an effective p-type dopant to enhance hole conductivity and also functions as a coloration agent that imparts a colored appearance to the organic electronic component in the switched-off state. This multi-functionality eliminates the need for separate dopant and colorant materials.
Solution Approach 2:
The invention creates a composite functional material by combining the dopant and coloration functions into a single copper complex molecule with specific ligand architecture. The ligand system (containing aryloxy and iminium groups) is designed to provide both electronic doping capability and optical absorption properties for appearance modification.
3Reliability
If existing dopants are used, then conductivity is enhanced, but the dopant efficiency and lifetime are insufficient
Solution Approach 1:
The copper-based dopant system provides superior doping efficiency compared to conventional dopants, achieving higher conductivity enhancement per unit concentration. The stability of copper complexes ensures long-term operational stability and extended device lifetime, overcoming the limitations of less efficient conventional dopants.
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 copper complex p-dopant significantly increases the conductivity of organic electronic components by multiple orders of magnitude, improves charge transport efficiency, and allows for a colored appearance in the switched-off state of organic light-emitting diodes, enhancing both efficiency and lifetime while reducing production costs.
Implementation Method 1
By means of doping, the conductivity of materials, and hence the charge carrier transport, can be increased by several orders of magnitude. The doping of organic materials with electron acceptors can, for example, increase the conductivity of hole conductor layers.
Data Source
AI summary
An organic electronic component includes a substrate and a first electrode arranged on the substrate, and at least one organic functional layer arranged on the first electrode. The organic functional layer includes a matrix material into which a p-dopant has been introduced and a second electrode arranged on the organic functional layer. The p-dopant includes a copper complex having at least two ligands. Each ligand has a benzene unit with six carbon atoms. With respect to each ligand, an iminium group is linked directly as a substituent to one of the six carbon atoms of the benzene unit, and an oxygen is bound as a substituent to an adjacent carbon atom of the benzene unit, with the oxygen and the benzene unit together forming an aryloxy group. The ligands are coordinated to the copper cation, so that the copper complex has a trans-structure. The organic functional layer is hole-conducting.