Organic Light-Emitting Device Using Boron Compounds
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Solution Overview
Problem
Current organic light emitting devices face challenges in achieving low driving voltage, high light emission efficiency, and long lifetime due to limitations in material development for their multilayer structures.
Innovation Solution
Incorporating specific compounds of Chemical Formulas 1 and 2 in the organic material layers, which can be used as dopants or hosts in the light emitting layer, to enhance the device's performance by optimizing the hole and electron injection and transfer processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional organic materials are used in the organic material layers, then the device structure can be maintained, but the driving voltage remains high and light emission efficiency is limited
Solution Approach 1:
The patent changes the chemical parameters of the organic materials by introducing specific compounds with particular molecular structures (Formula 1 with boron or phosphine oxide centers, and Formula 2 with specific aromatic hydrocarbon rings). These parameter changes in material composition enable simultaneous achievement of low driving voltage and high light emission efficiency that conventional materials cannot achieve.
Solution Approach 2:
The patent employs composite material strategy by combining two distinct compounds (Formula 1 and Formula 2) in the organic material layers. Each compound contributes different properties: Formula 1 provides electron transport and emission characteristics, while Formula 2 provides hole transport and structural stability. This composite approach resolves the contradiction between low voltage operation and high emission efficiency.
2Duration of action of stationary object
If conventional organic materials are used in the organic material layers, then the multilayer structure can be maintained, but the device lifetime is limited
Solution Approach 1:
The patent modifies the chemical parameters of the organic materials by introducing compounds with specific molecular structures (Formula 1 and Formula 2) that possess enhanced stability characteristics. These parameter changes in material composition enable simultaneous achievement of extended device lifetime and controlled structural complexity that conventional materials cannot achieve.
3Reliability
If the organic material layers use conventional materials, then the manufacturing process remains simple, but light emission efficiency is compromised
Solution Approach 1:
The patent changes the chemical parameters of the organic materials by introducing specific compounds with particular molecular structures (Formula 1 with boron or phosphine oxide centers, and Formula 2 with specific aromatic hydrocarbon rings). These parameter changes in material composition enable simultaneous achievement of high light emission efficiency and manageable synthesis complexity that conventional materials cannot achieve.
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 results in organic light emitting devices with improved driving voltage, light emission efficiency, and extended lifetime, as demonstrated in the examples provided.
Implementation Method 1
An organic light emission phenomenon generally refers to the conversion of electrical energy to light energy using an organic material. When a voltage is applied between the two electrodes in such an organic light emitting device structure, holes and electrons are injected into the organic material layer from the anode and the cathode, respectively, and when the injected holes and electrons meet, excitons are formed, and light is emitted when these excitons fall back to the ground state.
Data Source
AI summary
An organic light emitting device including a first electrode; a second electrode provided opposite to the first electrode; and one or more organic material layers provided between the first electrode and the second electrode, wherein one or more of the one or more organic material layers include a compound of Chemical Formula 1 and a compound of Chemical Formula 2.