Organic Semiconducting Material for OLED Efficiency and Stability
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Solution Overview
Problem
Current organic semiconducting devices, such as OLEDs, face challenges in achieving balanced electron and hole injection, efficient performance, extended lifespan at high brightness, and reduced operating voltage, which are crucial for large-size flat panel displays and mobile devices.
Innovation Solution
A semiconducting material comprising a first organic compound with a charge transport structural moiety and a specific group, deposited as a layer in organic semiconducting devices, enhancing electron mobility, electrochemical stability, and processing properties, including a low vaporization temperature for improved device efficiency and longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional organic semiconductor materials are used, then device structure can be maintained, but electron mobility and electrochemical stability are insufficient for large-size flat panel displays
Solution Approach 1:
The patent modifies the molecular structure of organic semiconductor materials by introducing specific chemical groups and moieties (formula 1 with various R1 substituents) to change electronic and electrochemical parameters, thereby simultaneously improving electron mobility and electrochemical stability for large-size OLED applications
Solution Approach 2:
The patent develops composite organic semiconductor materials combining charge transport structural moieties with specific functional groups (formula 1), creating new material compositions that achieve both high electron mobility and electrochemical stability required for large-size flat panel displays
2Illumination intensity
If higher current density is used to increase brightness, then display brightness improves, but organic semiconductor layer lifespan decreases
Solution Approach 1:
The patent optimizes the electrochemical parameters of organic semiconductor materials through molecular structure design (formula 1 with different R1 groups), enabling the material to withstand higher current densities while maintaining extended lifespan, thus allowing higher brightness operation without premature failure
3Use of energy by moving object
If operating voltage is reduced to decrease power consumption, then energy efficiency improves, but charge transport performance may deteriorate
Solution Approach 1:
The patent designs organic semiconductor materials with optimized molecular structures (formula 1 with various R1 substituents) that exhibit improved charge transport properties, enabling efficient charge carrier mobility even at reduced operating voltages, thus achieving lower power consumption without sacrificing transport performance
4Reliability
If complex organic semiconductor materials are used to improve performance, then device efficiency and lifespan improve, but manufacturing complexity and cost increase
Solution Approach 1:
The patent achieves improved device performance through systematic molecular structure design of organic semiconductor materials (formula 1 with various R1 groups), where performance enhancement is obtained through controlled structural modifications rather than complex multi-component systems, thereby maintaining manufacturing feasibility
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 solution enables organic semiconducting devices to exhibit superior efficiency, operational voltage, and lifetime, with good thermal stability and processing properties, addressing the limitations of existing OLEDs.
Implementation Method 1
a process for preparing a layer of the semiconducting material according to the present invention, the process comprising a step of depositing the first organic compound on a solid support
Implementation Method 2
Surprisingly, it was found that the semiconducting material according to the present invention and the compound according to the present invention as well as the organic semiconducting device according to the invention solve the problem underlying the present invention by enabling devices in various aspects to be superior over the organic electroluminescent devices known in the art, in particular with respect to efficiency, operational voltage and/or lifetime. Furthermore, it was found that the compounds according to the present invention exhibit particularly good processing properties, especially, a good thermal stability and surprisingly low vaporization temperature in vacuum thermal evaporation (VTE) manufacturing process.
Data Source
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AI summary
The present invention relates to a semiconducting material, a process for preparing a layer of the semiconducting material, and to an organic semiconducting device comprising the semiconducting material. The invention relates further to a compound.