Organic Host Compound for Lower Driving Voltage and Higher Efficiency
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Solution Overview
Problem
Current organic electronic elements face challenges in achieving high thermal stability and efficient charge balance in light-emitting layers, leading to limitations in driving voltage, luminous efficiency, and lifespan, particularly due to the lack of a stable and efficient host material for the light-emitting layer.
Innovation Solution
A compound represented by a specific formula is used as a host material in the light-emitting layer, which improves the organic electric element's performance by lowering driving voltage and enhancing luminous efficiency and lifetime, with the compound being integrated into various layers such as the hole injection, transport, and emission-auxiliary layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a conventional host material is used in the light-emitting layer, then the device can operate, but the driving voltage is high and the luminous efficiency is low
Solution Approach 1:
The patent modifies the molecular structure of the host material by introducing specific substituents (e.g., triphenamine, carbazole groups) to change the energy level parameters (HOMO, LUMO, T1) and charge transport properties. This structural parameter change enables lower driving voltage and higher luminous efficiency simultaneously
Solution Approach 2:
The patent creates a composite host material system combining multiple functional groups (electron-transporting groups, hole-transporting groups, and rigid core structures) within a single molecular framework, achieving balanced charge transport and improved electroluminescence characteristics
2Ease of manufacture
If the organic material layer is simplified, then the manufacturing process is easier, but the thermal stability and charge balance deteriorate
Solution Approach 1:
The patent designs a multi-functional host material that simultaneously provides charge transport (both electron and hole), thermal stability, and electroluminescence enhancement, eliminating the need for separate functional layers and simplifying the overall device structure while maintaining high reliability
Solution Approach 2:
The patent introduces specific functional groups at different positions of the molecular structure to provide localized functions: rigid cores for thermal stability, electron-transporting groups for charge balance, and luminescent groups for light emission, achieving multiple performance goals through molecular design
3Use of energy by moving object
If the driving voltage is reduced, then the power consumption decreases, but the luminous efficiency may be compromised
Solution Approach 1:
The patent optimizes the energy level parameters (HOMO, LUMO, T1) of the host material to match the dopant levels, enabling efficient energy transfer at lower operating voltages while maintaining high luminous efficiency through enhanced charge balance and reduced non-radiative recombination
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 this compound significantly improves the organic electric element's performance by reducing driving voltage, increasing luminous efficiency, and extending its lifespan, as demonstrated by improved electroluminescence characteristics and longer device operation times.
Implementation Method 1
excitons generated in the light emitting layer are transported to the dopant, thus emitting light with high efficiency
Implementation Method 2
An organic light emitting phenomenon refers to a phenomenon in which electric energy is converted into light energy of an organic material
Data Source
AI summary
The present invention provides the compound represented by Formula 1, an organic electric element comprising a first electrode, a second electrode, and an organic material layer formed between the first electrode and the second electrode, and electronic device thereof, and by comprising the compound represented by Formula 1 in the organic material layer, the driving voltage of the organic electric element can be lowered, and the luminous efficiency and life time of the organic electric element can be improved.