OLED Passivation via Ion Implantation Intermixed Layers
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Solution Overview
Problem
Existing organic light emitting devices face challenges in preventing moisture permeation, particularly at corners due to poor step coverage, leading to device damage, and current multi-layered inorganic thin film passivation methods result in stress, long processing times, and reduced transparency.
Innovation Solution
The use of ion implantation to form intermixed layers between the substrate and passivation layers, comprising components of the substrate, passivation layers, and implanted ions, effectively blocking moisture permeation without clear interfaces and simplifying the passivation layer structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-layered inorganic thin film passivation is used, then moisture permeation prevention is improved, but processing time increases and stress accumulates
Solution Approach 1:
The patent combines multiple passivation layers into a single integrated passivation layer with intermixed regions. Instead of depositing multiple separate inorganic thin films sequentially, the invention creates one passivation layer that contains intermixed regions formed by ion implantation, merging the functions of multiple layers into a single structure that reduces processing steps while maintaining moisture barrier effectiveness.
Solution Approach 2:
The patent changes the physical and chemical parameters of the passivation layer by introducing intermixed regions through ion implantation. This modifies the local composition and structure of the passivation layer, creating regions with enhanced moisture barrier properties without requiring multiple separate layers, thus reducing processing time while improving reliability.
2Reliability
If multi-layered inorganic thin film passivation is used, then moisture permeation prevention is improved, but device stress increases
Solution Approach 1:
The patent merges multiple passivation layers into a single passivation layer with intermixed regions, eliminating the interfaces between multiple layers. This reduces the accumulation of stress that would otherwise build up at the interfaces of multi-layered structures, while maintaining effective moisture permeation prevention through the intermixed regions.
3Illumination intensity
If ion implantation is used to form intermixed layers, then transparency is maintained, but manufacturing complexity increases
Solution Approach 1:
The patent uses ion implantation as an intermediary process to create intermixed regions within the passivation layer. This technique allows for precise control of the intermixed region formation while maintaining the transparency of the passivation layer, as ion implantation can be performed without significantly affecting the optical properties of the material.
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
This approach effectively prevents moisture permeation, reduces processing time, and maintains high transparency, thereby ensuring stable operation and extended lifespan of organic light emitting devices.
Implementation Method 1
a first intermixed layer is disposed between the substrate and the first passivation layer, the first intermixed layer comprising a component including the substrate, a component including the first passivation layer, and a component including implanted ions
Data Source
AI summary
An organic light emitting device including a substrate on which an organic light emitting unit is formed, wherein the organic light emitting unit sequentially includes a first electrode, an organic layer, and a second electrode; and a passivation layer covering the substrate and the second electrode, and a method of manufacturing the organic light emitting device.