Organic Electronic Device Charge Generation Layer Voltage
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Solution Overview
Problem
There is a need to improve the performance of organic electronic devices, particularly in terms of operating voltage, external quantum efficiency, lifetime, and voltage stability, as well as to develop compounds suitable for mass production with enhanced thermal properties and reduced health and safety risks.
Innovation Solution
The organic electronic device incorporates a charge generation layer comprising a p-type charge generation layer with an organic hole transport compound and a compound of formula (I), where the p-type charge generation layer includes a metal ion, a ligand, and an ancillary ligand, and a n-type charge generation layer with an organic electron transport compound and a metal dopant, arranged between the anode and cathode layers to enhance hole and electron injection and transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional organic hole transport compounds are used in the p-type charge generation layer, then the device structure is simple, but the operating voltage is high and efficiency is low
Solution Approach 1:
The patent uses composite materials by combining organic hole transport compounds with metal complexes (formula I) in the p-type charge generation layer. This composite approach enables improved hole transport efficiency and reduced operating voltage while maintaining structural feasibility through vacuum thermal evaporation deposition.
2Reliability
If conventional compounds are used for mass production, then manufacturing is easier, but thermal stability is insufficient and health and safety risks are higher
Solution Approach 1:
The patent changes the thermal parameters of the organic compounds by selecting specific compounds with higher thermal stability (decomposition temperature > 200°C). This parameter optimization enables mass production through vacuum thermal evaporation while improving device reliability and reducing health and safety risks associated with conventional compounds.
3Productivity
If the charge generation layer uses conventional materials, then the device is easier to manufacture, but the cd/A efficiency and lifetime are poor
Solution Approach 1:
The patent applies local quality by optimizing the specific composition of the p-type charge generation layer with metal complexes (formula I) at controlled concentrations (0.1-10 wt%). This localized optimization of material properties in the charge generation layer achieves high cd/A efficiency and extended lifetime while maintaining overall device manufacturability.
Data Source
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AI summary
The present invention is directed to an organic electronic device comprising a charge generation layer. In particular to an organic electronic device comprising an organic electronic device comprising anode layer, a cathode layer, a hole injection layer, a first emission layer and a charge generation layer, wherein the charge generation layer comprising a n-type charge generation layer and a p-type charge generation layer.