Crosslinking Ligand for High-Resolution Nanoparticle Patterning
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Solution Overview
Problem
Current high-resolution patterning technologies for quantum dot light-emitting diodes (QLED) are hindered by complex ligand synthesis methods and inorganic nanoparticle properties, making it difficult to achieve high-resolution patterned quantum dot layers.
Innovation Solution
A crosslinking ligand with coordinating groups, photosensitive degradation groups, and thermosensitive crosslinking groups is used to pattern nanoparticle layers by light irradiation and heat treatment, allowing for high-resolution patterning without altering nanoparticle ligands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If photolithography process is used to achieve high-resolution patterning of nanoparticle layer, then manufacturing precision is improved, but device complexity increases due to complicated ligand synthesis
Solution Approach 1:
The patent introduces a crosslinking ligand as an intermediary substance that mediates between the nanoparticle layer and the patterning process. This crosslinking ligand contains photosensitive groups that enable high-resolution patterning through light-induced crosslinking, avoiding the need for complex ligand synthesis while achieving precise pattern formation.
Solution Approach 2:
The patent utilizes photosensitive groups in the crosslinking ligand that undergo chemical parameter changes when exposed to light. This photo-induced crosslinking mechanism allows precise spatial and temporal control of the patterning process, achieving high manufacturing precision through optical parameter changes rather than complex chemical synthesis.
2Ease of manufacture
If inkjet printing is used to create patterned quantum dot layers, then ease of manufacture is improved, but manufacturing precision deteriorates as higher resolution cannot be achieved
Solution Approach 1:
The patent replaces the mechanical inkjet printing system with a photochemical patterning system. Instead of using mechanical deposition and patterning methods, the invention uses light-induced crosslinking of nanoparticles attached to the crosslinking ligand, achieving high resolution through optical fields rather than mechanical constraints.
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 method enables the formation of high-resolution nanoparticle and quantum dot layers with improved stability and efficiency, suitable for quantum dot light-emitting devices and display devices.
Implementation Method 1
performing a light irradiation treatment on a preset region of the substrate, to degrade the crosslinking ligand in the preset region, thereby releasing the crosslinking between the nanoparticles
Implementation Method 2
performing a heat treatment on the substrate, to form a crosslinking between the thermosensitive crosslinking groups in the crosslinking ligands
Data Source
AI summary
The present disclosure relates to a crosslinking ligand, a method for patterning a nanoparticle layer, a quantum dot light-emitting device, and a display device. The crosslinking ligand includes: at least two coordinating groups, at least one photosensitive degradation group and at least one thermosensitive crosslinking group, both of which are connected between the coordinating groups. The method for patterning the nanoparticle layer includes: forming a nanoparticle layer on a substrate; attaching a solution containing the crosslinking ligand to the substrate, to allow the crosslinking ligand to form a crosslinking between nanoparticles; performing a light irradiation treatment on a preset region of the substrate; removing the nanoparticles in the preset region; and performing a heat treatment on the substrate. The present disclosure does not need to design the structure of the ligand of the nanoparticles, and can form a nanoparticle layer with high resolution, simple process and high realizability.