OLED Material Composition for Lower Voltage and Longer Lifetime
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Solution Overview
Problem
Existing organic electroluminescent devices (OLEDs) require compounds that enhance electron and hole transport, improve recombination efficiency, and reduce driving voltage to achieve higher performance.
Innovation Solution
A compound represented by Formula (1) is introduced, featuring specific aryl and heterocyclic groups, which enhances electron and hole transport, leading to improved device capability, including extended lifetime and reduced driving voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If conventional compounds are used in organic EL devices, then the device can operate, but the lifetime is insufficient and efficiency is limited
Solution Approach 1:
The patent applies parameter changes by modifying the molecular structure of organic compounds through specific substituent groups (Y1-Y6, Ar1-Ar3) and structural features (deuterium atoms, aromatic rings, heterocyclic groups) to optimize electron mobility, hole mobility, and triplet energy levels, thereby improving both device lifetime and capability simultaneously
Solution Approach 2:
The patent employs composite materials by designing compounds that combine multiple functional groups and structural elements (aryl groups, heterocyclic groups, deuterium atoms, and various substituents) within a single molecular framework to achieve enhanced performance characteristics for improved device lifetime and reliability
2Productivity
If conventional compounds are used in organic EL devices, then the device can function, but the efficiency is insufficient
Solution Approach 1:
The patent optimizes energy efficiency by adjusting molecular parameters including triplet energy levels (T1), electron mobility, and hole mobility through specific structural modifications, reducing energy loss while enhancing device productivity and efficiency
Solution Approach 2:
The patent converts potential energy loss into beneficial effects by designing compounds with optimized triplet energy levels and charge transport properties that reduce non-radiative recombination and energy dissipation, thereby improving overall device efficiency
3Power
If conventional compounds are used in organic EL devices, then the device can operate, but the driving voltage is too high
Solution Approach 1:
The patent reduces driving voltage by modifying molecular parameters such as electron affinity, ionization potential, and charge mobility through specific structural design, thereby lowering the energy required for device operation and reducing overall energy consumption
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 compound improves the performance of OLEDs by increasing efficiency and reducing the driving voltage, thereby extending the device's lifespan.
Implementation Method 1
electrons from the cathode side and holes from the anode side are injected into the light emitting region
Implementation Method 2
electrons from the cathode side and holes from the anode side are injected into the light emitting region
Implementation Method 3
the injected electrons and holes are recombined in the light emitting region to generate an excited state, which then returns to the ground state to emit light
Implementation Method 4
the injected electrons and holes are recombined in the light emitting region to generate an excited state, which then returns to the ground state to emit light
Data Source
Figure 1~2
AI summary
A compound that further improves the capability of an organic electroluminescent device, an organic electroluminescent device having a further improved device capability, and an electronic device including the organic electroluminescent device are provided. A compound represented by the following formula (1): wherein the symbols in the formula (1) are defined in the description, an organic electroluminescent device including the compound, and an electronic device including the organic electroluminescent device.