Quantum Dot Film Fixing Layer for Stable QLED Patterning
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Solution Overview
Problem
Quantum dots are prone to falling off during the patterning process and the formed patterns are irregular in quantum dot light emitting diodes (QLEDs).
Innovation Solution
A quantum dot device with a substrate assembly and a first fixing layer containing silane coupling agents with multi-coordinate bonds, forming connection structures with the substrate and quantum dots, and a second fixing layer to stabilize the quantum dots, preventing them from falling off and ensuring regular patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional patterning processes (ultrasonic, developing) are used for quantum dots, then the patterning can be completed, but quantum dots are prone to falling off and formed patterns are irregular
Solution Approach 1:
The patent applies preliminary action by forming a fixing layer on the substrate before depositing quantum dots. This fixing layer contains functional groups that can chemically bond with both the substrate and quantum dots, creating a stable foundation that prevents quantum dot falling off during subsequent patterning processes. The fixing layer is prepared in advance to ensure quantum dots remain stable throughout the patterning sequence.
Solution Approach 2:
The fixing layer acts as an intermediary between the substrate and quantum dots. It contains dual functional groups: one type of functional group bonds with the substrate surface, while another type bonds with quantum dots. This intermediary layer resolves the contradiction by providing a stable connection interface that prevents quantum dot detachment while enabling precise pattern formation.
2Reliability
If conventional connection methods are used between substrate and quantum dots, then the device can be assembled, but quantum dots fall off during patterning process
Solution Approach 1:
The patent changes the chemical parameters of the connection interface by introducing a fixing layer with specific functional groups. Instead of relying on physical adsorption or weak bonding, the fixing layer provides strong chemical bonds through functional groups that can form stable connections with both substrate and quantum dots. This parameter change in bonding strength and chemical affinity ensures quantum dots remain attached during patterning while simplifying the manufacturing process.
3Ease of manufacture
If quantum dots are directly deposited on substrate without fixing layer, then the manufacturing process is simpler, but quantum dots are prone to falling off and patterns are irregular
Solution Approach 1:
The fixing layer serves as a thin intermediary film that does not significantly complicate the manufacturing process while dramatically improving pattern formation quality. This intermediary layer can be deposited using standard techniques and provides the necessary chemical functionality to ensure quantum dots remain stable during patterning, thus maintaining ease of manufacture while achieving high manufacturing precision.
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 connection structures stabilize the quantum dots, reducing the risk of falling off and irregular patterns, thereby improving the efficiency and longevity of the quantum dot device.
Implementation Method 1
a first fixing layer, where the first fixing layer is located on one side of the substrate assembly and has silane coupling agents with multi coordinate bonds, and a first connection structure is arranged between the first fixing layer and the substrate assembly
Data Source
AI summary
Disclosed are a quantum dot device, a display apparatus, and a manufacturing method for a quantum dot device. The quantum dot device includes: a substrate assembly; a first fixing layer, the first fixing layer being located on one side of the substrate assembly and having silane coupling agents with multi coordinate bonds, and first connection structures being provided between the first fixing layer and the substrate assembly; a quantum dot film layer, the quantum dot film layer being located on the side of the first fixing layer away from the substrate assembly and having a plurality of pattern portions, the pattern portions having quantum dots, and second connection structures being provided between the pattern portion and the first fixing layer.