OLED Light Extraction Particles in Metal Electrode
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Solution Overview
Problem
Existing OLED display devices have low light extraction efficiency, despite previous attempts to enhance it through light extraction structures on the outer or inner surfaces of the base substrate, which only provide limited improvements.
Innovation Solution
A light emitting device with a laminated structure comprising a first electrode, an organic layer, and a second electrode, where the second electrode is embedded with light extraction particles, disrupting surface plasma waves and increasing light extraction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light extraction structures (scattered particles, MLA, rough surface) are provided on the outer surface or inner surface of the base substrate, then light extraction efficiency is increased to some extent, but the light extraction efficiency remains low in practical application
Solution Approach 1:
The patent applies local quality by embedding light extraction particles specifically within the metal electrode layer rather than uniformly modifying the entire substrate or adding separate extraction structures. This localized approach concentrates the light extraction function where it is most needed - at the interface between the organic layer and metal electrode - while avoiding unnecessary structural complexity elsewhere in the device
Solution Approach 2:
The patent uses composite materials by combining light extraction particles with the metal electrode to create a composite electrode structure. This composite material approach integrates the light extraction function directly into the electrode, eliminating the need for separate extraction structures and reducing overall device complexity while maintaining high light extraction 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 integration of light extraction particles in the metal electrode enhances light extraction efficiency by up to 150% by destroying surface plasma waves, leading to improved light extraction in OLED display devices.
Implementation Method 1
the second electrode is provided with light extraction particles therein... the light extraction particles destroy the surface plasma waves generated by the metal electrode
Data Source
AI summary
The invention provides a light emitting device and a manufacturing method thereof, and a display device. The light emitting device comprises a base substrate and a laminated structure formed on the base substrate, the laminated structure including a first electrode, an organic layer and a second electrode which are laminated, the organic layer is provided between the first electrode and the second electrode, wherein the second electrode is provided with light extraction particles therein. In solutions of the light emitting device and the manufacturing method thereof, and the display device, the metal electrode is provided with light extraction particles therein, the light extraction particles destroy the surface plasma waves generated by the metal electrode, so that light fallen into the surface plasma waves can be extracted, the light extraction efficiency of the metal electrode is increased, and thus the light extraction efficiency of the light emitting device is increased.