Phosphorus Oxide Compound with Condensed Rings for Organic EL
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current organic electroluminescence (EL) devices face challenges in achieving higher performance in terms of driving voltage, external quantum efficiency, and extended lifetime, necessitating the development of new materials for improved performance.
Innovation Solution
A compound with a specific structure featuring a condensed ring system is introduced, represented by the general formula (1), which includes an oxygen, sulfur, or selenium atom, and specific arylene and heteroarylene groups, enhancing the performance of organic EL devices by optimizing the structure of the light emitting layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional phosphorus oxide compounds are used in organic EL devices, then the devices can operate with basic performance, but the driving voltage is high, external quantum efficiency is low, and lifetime is short
Solution Approach 1:
The patent changes the molecular structure parameters of the phosphorus oxide compound by introducing specific condensed ring systems (naphthalene, anthracene, phenanthrene groups) and controlling substitution patterns. This structural parameter change leads to improved electronic properties including lower driving voltage and extended device lifetime without sacrificing stability
Solution Approach 2:
The patent creates composite molecular structures by combining phosphorus oxide core with multiple aromatic ring systems and substituent groups. These composite structures exhibit synergistic effects that simultaneously improve driving voltage, external quantum efficiency, and device lifetime beyond what single-component compounds achieve
2Reliability
If conventional phosphorus oxide compounds are used in organic EL devices, then the devices can operate, but external quantum efficiency is low
Solution Approach 1:
The patent applies local quality by introducing specific functional groups and substituent patterns at particular positions on the phosphorus oxide molecule. The condensed ring systems and aromatic substituents are strategically placed to optimize electron-hole recombination and light emission at specific molecular sites, enhancing external quantum efficiency while maintaining overall molecular stability
3Reliability
If new phosphorus oxide compounds with condensed ring structures are developed, then device performance improves, but material synthesis complexity increases
Solution Approach 1:
The patent employs segmentation by dividing the complex phosphorus oxide molecule into modular components: a central P=O core, intermediate aromatic linkers, and terminal substituent groups. This modular architecture allows systematic synthesis through sequential assembly of well-defined building blocks, reducing overall synthesis complexity while achieving high device performance
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 results in organic EL devices with improved driving voltage, external quantum efficiency, and extended lifetime, making it suitable for electronic equipment applications.
Implementation Method 1
When a voltage is applied between the two electrodes, electrons from the cathode side and holes from the anode side are injected into a light emitting region. The injected electrons and holes are recombined in the light emitting region to produce an exited state, and when the exited state returns to the ground state, light is emitted.
Data Source
AI summary
An organic electroluminescence device having higher performance, in particular exhibiting a better driving voltage and a better external quantum efficiency, while having an extended lifetime; and an electronic equipment provided with the organic electroluminescence device are provided. In addition, a compound for realizing the same device and equipment is provided. Specifically, a compound having a specific structure having a triphenylene skeleton; an organic electroluminescence device using the compound; and an electronic equipment provided with the organic electroluminescence device were provided.