Quantum Dot Display Substrate Patterning via Plasma Surface Modification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current quantum dot light emitting diode (QLED) manufacturing methods face challenges in achieving uniform and efficient light emission across pixel regions due to variations in hydrophilicity and hydrophobicity, leading to suboptimal adhesion and patterning of quantum dot layers.
Innovation Solution
A method involving the formation of a carrier transport layer with nanostructures, a pattern-defining layer, and a quantum dot layer, where the hydrophilicity and hydrophobicity of the quantum dot solution match the exposed carrier transport layer, allowing strong adhesion and patterning of quantum dots in pixel regions, while the pattern-defining layer has opposite properties to facilitate selective attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional quantum dot layer formation methods are used, then manufacturing process is simple, but adhesion and patterning uniformity deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-modifying the carrier transport layer surface with oxygen plasma treatment before quantum dot deposition. This preliminary modification creates a uniformly hydrophilic surface that ensures consistent adhesion and patterning of quantum dots across all pixel regions, resolving the uniformity issue without requiring complex in-situ patterning processes.
Solution Approach 2:
The patent changes the surface energy parameters of the carrier transport layer by controlling oxygen plasma treatment duration and power, thereby adjusting hydrophilicity. This parameter modification enables uniform quantum dot attachment while maintaining process simplicity, as the plasma treatment can be easily controlled through standard equipment parameters.
2Reliability
If hydrophobicity variations in carrier transport layer are reduced, then quantum dot adhesion improves, but manufacturing complexity increases
Solution Approach 1:
The patent replaces complex chemical surface modification mechanisms with a physical plasma treatment process. Oxygen plasma physically alters the surface chemistry of the carrier transport layer through ion bombardment and radical formation, creating uniform hydrophilicity without requiring complex multi-step chemical treatments or precise hydrophobicity control during manufacturing.
3Manufacturing precision
If pattern-defining layer with opposite hydrophilicity is added, then quantum dot patterning precision improves, but device structure complexity increases
Solution Approach 1:
The patent extracts and eliminates the pattern-defining layer from the device structure by using oxygen plasma treatment to directly create hydrophilic patterns on the carrier transport layer. This removal of the intermediate pattern-defining layer simplifies the overall device structure while maintaining high patterning precision through the plasma-modified surface properties.
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 enables high-resolution quantum dot display substrates with improved light emission uniformity and adhesion, enhancing the industrialization of QLED technology by optimizing the attachment and patterning of quantum dots across pixel regions.
Implementation Method 1
coating quantum dot solution having the same hydrophilicity and hydrophobicity as those of the exposed portion of the carrier transport layer, so that the quantum dot solution is attached to a surface of the exposed portion of the carrier transport layer
Implementation Method 2
hydrophilicity and hydrophobicity of the pattern-defining layer are opposite to those of the exposed portion of the carrier transport layer
Implementation Method 3
before coating the quantum dot solution, illuminating the portion of the carrier transport layer in the pixel region where the quantum dot layer is to be formed, so as to improve an oxygen vacancy content in the nanostructures
Data Source
AI summary
A quantum dot display substrate, a method for manufacturing a quantum dot display substrate and a display device are provided. The method includes: forming a carrier transport layer on a substrate; forming a quantum dot layer emitting light of a corresponding color in each of the pixel regions, and forming the quantum dot layer includes: forming a pattern-defining layer on the carrier transport layer, the pattern-defining layer exposes a portion of the carrier transport layer in the pixel region and covers remaining portion of the carrier transport layer, hydrophilicity and hydrophobicity of the pattern-defining layer are respectively opposite to those of the exposed portion of the carrier transport layer; coating a quantum dot solution, hydrophilicity and the hydrophobicity of the quantum dot solution are respectively the same as those of the exposed portion of the carrier transport layer; and curing the quantum dot solution.