Organic Light Emitting Device Using Composite Compounds for Voltage and Lifetime
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Solution Overview
Problem
There is a need for an organic light emitting device with improved driving voltage, efficiency, and lifetime, as existing devices face challenges in optimizing these parameters effectively.
Innovation Solution
The organic light emitting device incorporates a light emitting layer comprising specific compounds represented by Chemical Formulas 1 and 2, which enhance the device's efficiency and longevity by optimizing the interaction of holes and electrons, thereby reducing driving voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional organic materials are used in the light emitting layer, then the device structure is simple, but the driving voltage is high and efficiency is low
Solution Approach 1:
The patent employs composite organic materials in the light emitting layer, combining multiple functional components with complementary properties. This composite approach enables simultaneous optimization of electrical characteristics (lower driving voltage) and operational stability (extended lifetime), resolving the contradiction between energy efficiency and reliability.
Solution Approach 2:
The invention modifies key parameters of the organic materials including molecular structure, energy levels, and charge mobility. By adjusting these parameters, the device achieves improved charge transport efficiency (reducing driving voltage) while maintaining material stability (extending lifetime).
2Productivity
If conventional organic materials are used in the light emitting layer, then the device structure is simple, but efficiency is low
Solution Approach 1:
The patent utilizes composite organic materials comprising multiple functional units that work synergistically. These materials achieve high device efficiency through optimized charge generation, transport, and recombination, while the molecular-level complexity is managed through systematic material design rather than device structural complexity.
Solution Approach 2:
The invention implements local quality optimization by designing specific functional domains within the organic materials - such as electron-donating and electron-withdrawing units - that perform specialized functions. This enables high overall device efficiency without requiring complex device architecture, as the complexity is localized to the material composition.
3Reliability
If conventional organic materials are used in the light emitting layer, then manufacturing is simpler, but device lifetime is short
Solution Approach 1:
The patent employs composite organic materials that can be synthesized through established chemical methods and processed using conventional fabrication techniques. The composite structure enables enhanced device lifetime through improved material stability and reduced degradation, while maintaining compatibility with existing manufacturing processes.
Solution Approach 2:
The invention uses organic materials that can be synthesized cost-effectively through standard chemical procedures. While the materials have complex structures for enhanced performance, they are produced using economical methods, making the extended-lifetime devices commercially viable without requiring expensive or complex manufacturing infrastructure.
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 use of these compounds in the light emitting layer improves the device's efficiency and extends its lifetime while lowering the driving voltage, resulting in a more effective and durable organic light emitting device.
Implementation Method 1
an organic light emitting phenomenon refers to a phenomenon where electric energy is converted into light energy by using an organic material
Data Source
AI summary
An organic light emitting device having improved driving voltage, efficiency and lifetime. The device includes a light emitting layer including a compound of Chemical Formula 1 and a compound of Chemical Formula 2.wherein: X1 to X7 are each independently CR1 or N, provided that at least one of X1 to X7 is N; Ar1 and Ar2 are each independently a substituted or unsubstituted C6-60 aryl or C2-60 heteroaryl containing at least one of N, O and S; any one of R′ and R′1 to R′6 is Chemical Formula 2A, and the rest are hydrogen, deuterium, or a substituted or unsubstituted C6-60 aryl:where Ar′1 and Ar′2 are each independently a substituted or unsubstituted C6-60 aryl or C2-60 heteroaryl containing at least one of N, O and S, and the other substituents are as defined in the specification.