Conductive Protective Layers for OLED Photolithography
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Solution Overview
Problem
Current manufacturing methods for organic light-emitting diodes (OLEDs) using photolithography result in poor light-emitting efficiency due to direct contact of sensitive materials with solvents and etching solutions, which cause chemical changes and affect the characteristics of the materials, and the thickness of protective layers impacts barrier properties and conductivity.
Innovation Solution
The use of conductive protection layers, such as hole transmission and electron transmission auxiliary layers, formed by photolithography, which protect the sensitive materials from solvent and gas contact while maintaining conductivity, preventing adverse effects on the OLED structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective layer is formed on the surface of the OLED before photolithography, then the barrier property to solvent and etching solution is improved, but the conductivity of hole transmission and/or electron transmission deteriorates
Solution Approach 1:
The protective layer is divided into multiple separate conductive layers (hole transmission auxiliary layer and electron transmission auxiliary layer) that are formed at different stages of the manufacturing process. Each layer provides protection during specific photolithography operations while maintaining electrical conductivity, thus resolving the contradiction between barrier properties and conductivity.
2Reliability
If the protective layer is made thicker, then the barrier property to solvent and etching solution is improved, but the light transmittance and conductivity deteriorate
Solution Approach 1:
Instead of using a single thick protective layer, the invention uses multiple thin conductive layers (hole transmission auxiliary layer and electron transmission auxiliary layer) that provide sufficient barrier protection during photolithography while maintaining light transmittance and conductivity. Each layer is optimized to be thin enough to allow light and charge carrier transmission.
3Productivity
If photolithography process is used for manufacturing OLED, then the manufacturing efficiency is improved, but the sensitive materials are damaged by direct contact with solvent and etching solution
Solution Approach 1:
Conductive auxiliary layers (hole transmission auxiliary layer and electron transmission auxiliary layer) are introduced as intermediary protective structures during the photolithography process. These layers act as mediators that protect the sensitive organic light-emitting materials from direct contact with harmful solvents and etching solutions, while still allowing the photolithography process to proceed efficiently.
Data Source
AI summary
The present disclosure provides an organic light emitting diode and method for manufacturing the same. The organic light emitting diode includes a substrate; an anode layer formed on a substrate, a hole transmission layer formed on the anode layer, a hole transmission auxiliary layer formed on the hole transmission layer and performed by a photolithography process, wherein the hole transmission auxiliary layer protects a surface of the hole transmission layer, at least one illuminating block formed on the hole transmission auxiliary layer, wherein the hole transmission auxiliary layer is electrically connected between the at least one illuminating block and the hole transmission layer, an electron transmission auxiliary layer formed on the at least one illuminating block; an electron transmission layer formed on the electron transmission auxiliary layer and a cathode layer formed on the electron transmission layer.