Quantum Dot Polymer Thin Film for High-Resolution QLED Patterning
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Solution Overview
Problem
The manufacturing of high-resolution Quantum Dot Light Emitting Diodes (QLED) products poses challenges due to the limitations of existing technologies in accurately controlling the evaporation area and achieving high resolution without the use of printing methods.
Innovation Solution
A light emitting thin film is developed comprising a polymer and quantum dots bonded to the polymer, where the quantum dots include a metal nanoparticle and a core-shell structure connected to the metal nanoparticle, bonded to the polymer by a sulfide bond. This thin film is used in a light emitting device and display substrate, and is manufactured through a method involving the formation of a polymer-precursor layer and a quantum-dot layer, followed by development to form a patterned quantum-dot layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional evaporation methods are used for manufacturing QLED, then the manufacturing process is simple, but the resolution and evaporation area control are insufficient
Solution Approach 1:
The patent introduces a polymer as an intermediary substance that binds quantum dots to form a thin film. This polymer mediator enables precise control of the evaporation area and resolution while maintaining manufacturing feasibility, resolving the contradiction between precision and complexity
Solution Approach 2:
The patent creates a composite light-emitting thin film consisting of quantum dots bonded to a polymer matrix. This composite structure allows for better control of evaporation characteristics and resolution while keeping the manufacturing process manageable
2Manufacturing precision
If printing methods are used to achieve high resolution, then the resolution improves, but the manufacturing complexity and cost increase
Solution Approach 1:
The patent replaces the mechanical printing process with a chemical bonding approach where quantum dots are bound to a polymer that forms a thin film through evaporation. This substitution achieves high resolution without requiring complex printing equipment or processes
Solution Approach 2:
The patent changes the physical and chemical parameters of the quantum dot-polymer system to enable controlled evaporation and film formation. By adjusting parameters such as polymer type, quantum dot concentration, and evaporation conditions, high resolution is achieved through a simpler manufacturing process
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 solution enables the production of high-resolution QLED display panels without the need for printing methods, improving the resolution and luminous efficiency of the quantum dots, and enhancing the overall performance of the light emitting device.
Implementation Method 1
the metal nanoparticle is bonded to the polymer by a sulfide bond
Data Source
AI summary
A light emitting thin film and a manufacturing method thereof, a light emitting device and a displaying substrate, which relates to the technical field of displaying. The light emitting thin film includes a polymer (1) and a quantum dot (2) bonded to the polymer (1); the quantum dot (2) includes a metal nanoparticle (3) and a core-shell structure connected to the metal nanoparticle (3); and the metal nanoparticle (3) is bonded to the polymer (1) by a sulfide bond.