Reduction Preventing Layer for Quantum Dot Electron Transport
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Solution Overview
Problem
Current electronic devices utilizing quantum dot light emitting elements face challenges in enhancing luminous efficiency and service life, particularly in maintaining effective electron transport functions.
Innovation Solution
Incorporation of a reduction preventing layer containing a specific reduction preventing agent and metal oxide in the electron transport region, which reduces oxygen vacancies and enhances electron transport efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If quantum dot light emitting elements are used to enhance color reproducibility, then color quality is improved, but luminous efficiency and service life deteriorate due to electron transport function degradation
Solution Approach 1:
The patent introduces a reduction preventing layer containing specific compounds (Formula 1 or Formula 2) that chemically interact with oxygen vacancies in the electron transport region. This chemical parameter change prevents the degradation of electron transport function, thereby maintaining luminous efficiency and service life while preserving the color reproducibility benefits of quantum dot light emitting elements.
2Device complexity
If conventional electron transport materials are used, then device structure is simple, but electron transport function degrades over time due to oxygen vacancies
Solution Approach 1:
The reduction preventing layer is introduced before the electron transport region to preemptively prevent oxygen vacancy formation. By performing the reduction prevention action in advance, the electron transport function is protected from degradation, ensuring long-term stability without significantly increasing device complexity.
3Ease of manufacture
If no reduction preventing layer is used, then manufacturing process is simple, but electron trap effects reduce luminous efficiency
Solution Approach 1:
The reduction preventing layer acts as an intermediary between the electron transport region and oxygen vacancies. This intermediate layer chemically binds with oxygen vacancies, preventing them from creating electron traps that would otherwise reduce luminous efficiency. The addition of this layer maintains manufacturing simplicity while significantly improving luminous efficiency.
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 significantly improves luminous efficiency by minimizing electron trap effects and maintaining electron transport function, leading to enhanced performance over time.
Implementation Method 1
Incorporation of a reduction preventing layer containing a specific reduction preventing agent and metal oxide in the electron transport region, which reduces oxygen vacancies and enhances electron transport efficiency
Implementation Method 2
the first emission layer may emit red light, the second emission layer may emit green light, and the third emission layer may emit blue light
Data Source
AI summary
An electronic device including first to third light emitting regions and a dummy region is provided. The electronic device includes a base layer, and a display element layer including a pixel defining film on the base layer, light emitting elements divided by the pixel defining film, and a reduction preventing layer containing a reduction preventing agent, and the light emitting elements each include an electron transport region containing a metal oxide. The electronic device may have improved electron transport function of the electron transport region by the reduction preventing agent contained in the reduction preventing layer, thereby improving the luminous efficiency.