Organic Light Emitting Device Laser Treatment for Surface Stability
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Solution Overview
Problem
Conventional organic light emitting devices have unsatisfactory durability and unstable surface morphology due to the limitations of their manufacturing processes, such as rapid solvent removal, which affects the stability and structure of organic thin films.
Innovation Solution
The method involves forming organic thin films and optically treating them using a laser beam, either directly or through the substrate, under an inert gas atmosphere, to rearrange molecular chains and stabilize the surface morphology, thereby enhancing the durability and stability of the organic light emitting devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electric aging method or thermal baking method is used to stabilize organic thin films, then the organic thin films can be stabilized and solvent can be removed, but the durability remains unsatisfactory and surface morphology remains unstable
Solution Approach 1:
The patent applies optical treatment using laser beams with specific parameters (wavelength, intensity, pulse duration) to treat the organic thin film. This changes the physical state of the organic molecules, promoting proper crystallization and molecular arrangement that enhances both durability and surface morphology stability, overcoming the limitations of conventional thermal or electric aging methods
Solution Approach 2:
The patent replaces the conventional thermal baking method (mechanical/thermal system) with optical treatment using laser beams. This substitution provides more precise and controlled energy delivery to the organic thin film, enabling better molecular arrangement and stabilization without the drawbacks of thermal methods, thereby improving both durability and surface morphology
2Productivity
If rapid solvent removal is performed during manufacturing, then the manufacturing process is efficient, but the surface morphology of organic thin films becomes unstable
Solution Approach 1:
The patent applies optical treatment at a specific stage during the manufacturing process, before final device assembly, to pre-stabilize the organic thin film surface morphology. This preliminary action ensures proper molecular arrangement is achieved before subsequent manufacturing steps, maintaining stability while preserving manufacturing efficiency
Solution Approach 2:
The optical treatment uses specifically controlled laser parameters (intensity, wavelength, exposure time) to induce proper crystallization and molecular ordering in the organic thin film after rapid solvent removal. This parameter-controlled approach restores and stabilizes surface morphology without requiring slow solvent evaporation, thus maintaining manufacturing 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
This approach significantly increases the durability and stabilizes the surface morphology of organic light emitting devices, as demonstrated by improved half-lives and reduced surface roughness, effectively addressing the limitations of existing manufacturing methods.
Implementation Method 1
The optical treatment of the organic thin film may be performed by projecting a laser beam onto the organic thin film
Implementation Method 2
optically treating the organic thin film... to rearrange molecular chains and stabilize the surface morphology
Data Source
AI summary
A method of manufacturing an organic light emitting device, whereby a first electrode is formed on a substrate, at least one organic thin film is formed on the first electrode, the organic thin film is optically treated, and a second electrode is formed on the organic thin film. The method can provide an organic light emitting device with an organic thin film having a stable surface morphology and increased durability.