Organometallic Compound for Low Voltage Blue Light Emitting Element
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Solution Overview
Problem
Existing light emitting elements for display devices face challenges in achieving low voltage driving and high luminous efficiency, which are crucial for improving display quality.
Innovation Solution
The development of a light emitting element that incorporates an organometallic compound represented by Formula 1, which includes a heteropolycyclic ring structure, to enhance light efficiency and allow for low voltage driving. This compound is used in the emission layer of the light emitting element, along with other compounds like those represented by Formulas HT-1, ET-1, and F-1, to optimize performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional light emitting materials are used, then the light emitting element can operate, but the luminous efficiency is insufficient and driving voltage is high
Solution Approach 1:
The patent modifies the molecular structure parameters of the light emitting material by introducing specific heteropolycyclic ring structures (combining nitrogen-containing and oxygen/sulfur-containing rings) and adjusting substituent groups. This structural parameter change optimizes the HOMO energy level to achieve low driving voltage while improving luminous efficiency through enhanced charge transport properties
Solution Approach 2:
The invention uses composite molecular design combining different heterocyclic ring systems (pyridine, pyrimidine, triazine nitrogen-containing rings fused with furan, thiophene, oxadiazole, thiadiazole oxygen/sulfur-containing rings) to create a material that simultaneously achieves low voltage operation and high luminous efficiency through synergistic effects of the combined structures
2Ease of manufacture
If the light emitting element structure is simplified, then manufacturing is easier, but display quality and luminous efficiency deteriorate
Solution Approach 1:
The patent achieves simplified manufacturing by designing a single-molecule solution that inherently provides both low voltage operation and high luminous efficiency. The molecular structure parameters are optimized to eliminate the need for complex multi-layer device structures, allowing straightforward fabrication while maintaining excellent display quality
3Use of energy by moving object
If higher driving voltage is applied, then luminous efficiency may improve, but power consumption increases and device reliability decreases
Solution Approach 1:
The invention changes the energy level parameters of the light emitting material, specifically optimizing the HOMO energy level through heteropolycyclic ring structure design. This enables the material to achieve high luminous efficiency at low driving voltages, reducing electrical stress on device components and improving overall reliability and stability
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 proposed solution achieves improved luminous efficiency and low driving voltage characteristics, leading to enhanced display quality with the light emitting element emitting blue light and exhibiting excellent light efficiency.
Implementation Method 1
In an embodiment, the compound of Formula 1 above may emit light of phosphorescence (e.g., may emit light by way of phosphorescence)
Implementation Method 2
organic electroluminescence display devices and the like are display devices including so-called self-luminescent light emitting elements in which holes and electrons injected from a first electrode and a second electrode recombine in an emission layer, and thus a luminescent material in the emission layer emits light
Data Source
AI summary
Provided is a light emitting element that may include a first electrode, a second electrode on the first electrode, and an emission layer between the first electrode and the second electrode. The emission layer may include a first compound represented by Formula 1 and exhibit low driving voltage and improved luminous efficiency characteristics.