Triazine-Fluorene Semiconductor Compounds for Low-Voltage OLED Lifetime
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing organic semiconductor materials and devices face challenges in achieving high efficiency and long lifetime while maintaining low operating voltage, particularly in large-size flat panel displays.
Innovation Solution
Development of compounds comprising a triazine group, fluorene group, and aryl group for use in organic semiconductor layers, which are essentially non-emissive and exhibit high cd/A efficiency and long lifetime, maintaining similar or improved operating voltage levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional organic semiconductor materials are used, then device structure is simple, but electron mobility is insufficient and electrochemical stability is poor
Solution Approach 1:
The patent employs composite organic semiconductor materials formed by combining triazine core structures with fluorene and aryl groups. This composite approach enables the material to achieve both high electron mobility and excellent electrochemical stability while maintaining reasonable structural complexity. The triazine- fluorene-aryI composite structure provides synergistic effects that resolve the contradiction between reliability improvement and device complexity.
Solution Approach 2:
The patent systematically varies molecular parameters including substituent types (aryl, fluorene groups), substituent positions, and molecular weights to optimize the balance between electrochemical stability and structural complexity. By adjusting these parameters, the invention achieves high reliability without excessive complexity in the compound structure.
2Productivity
If organic semiconductor materials with high electron mobility are developed, then device efficiency improves, but manufacturing complexity increases
Solution Approach 1:
The patent divides the organic semiconductor material into modular components: a triazine core unit and interchangeable fluorene-aryI substituent modules. This segmentation allows for systematic optimization of electron mobility through substituent selection while maintaining standardized core structures, thereby reducing manufacturing complexity. The modular design enables easy synthesis and processing of high-performance materials.
Solution Approach 2:
The patent optimizes manufacturing ease by controlling molecular parameters such as substituent chain length, aromatic ring count, and molecular weight within specific ranges. These parameter adjustments enhance electron mobility while keeping the compounds processable through conventional organic semiconductor manufacturing techniques, thus resolving the contradiction between productivity and ease of manufacture.
3Use of energy by moving object
If operating voltage is reduced to lower power consumption, then energy efficiency improves, but device performance may deteriorate
Solution Approach 1:
The patent adjusts molecular energy level parameters including HOMO and LUMO levels through strategic selection of triazine, fluorene, and aryl substituents. These parameter changes enable the organic semiconductor to achieve low operating voltage (reducing power consumption) while maintaining sufficient electron mobility and electrochemical stability for reliable device performance, thus resolving the energy-efficiency versus performance contradiction.
Solution Approach 2:
The patent uses computationally designed molecular structures based on theoretical models to predict and optimize the balance between operating voltage and device performance. By copying successful structural motifs from high-performance materials and adapting them to lower voltage requirements, the invention achieves energy efficiency without sacrificing reliability.
Data Source
AI summary
The present invention relates to compounds according to formula 1: suitable for use as a layer material for electronic devices, and to an organic semiconductor layer comprising at least one compound according to formula 1, as well as to an organic electronic device comprising at least one organic semiconductor layer thereof, and a method of manufacturing the same.