Perovskite Microstructure Arrays via Solution Molding
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Solution Overview
Problem
Current methods for manufacturing microstructure arrays and micro light emitting diodes using perovskite nanocrystals are complex and often require vacuum conditions, limiting their scalability and cost-effectiveness.
Innovation Solution
A method involving a mold with concave micro patterns is used to coat a perovskite precursor solution, including a hydrophilic polymer and ligands, which is then heat-treated to form composite microstructures of perovskite nanocrystals and hydrophilic polymers, allowing for the formation of microstructure arrays and micro light emitting diodes with improved performance in a simpler, non-vacuum process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional vacuum-based methods are used to manufacture perovskite microstructure arrays, then manufacturing precision and reliability are improved, but device complexity and production cost increase
Solution Approach 1:
The patent replaces complex vacuum-based physical vapor deposition systems with a simple solution-based coating process. The perovskite microstructures are formed by coating a precursor solution containing perovskite nanocrystals, followed by thermal treatment, eliminating the need for vacuum equipment and complex deposition mechanisms while achieving comparable manufacturing precision
Solution Approach 2:
The patent changes the physical state and chemical form of perovskite material from vapor phase deposition to solution phase coating. By using a precursor solution with dissolved perovskite nanocrystals and applying thermal treatment to induce crystallization, the process achieves precise microstructure formation through chemical parameter control rather than mechanical vacuum systems
2Manufacturing precision
If complex vacuum-based manufacturing processes are used, then microstructure quality is improved, but productivity and scalability worsen
Solution Approach 1:
The patent replaces time-consuming vacuum-based deposition processes with rapid solution coating methods. The precursor solution can be applied using simple techniques such as spin coating, dip coating, or inkjet printing, enabling fast processing and easy scaling to large areas without requiring complex vacuum chamber configurations
Solution Approach 2:
The patent uses a precursor solution containing segmented perovskite nanocrystals that can be independently controlled in size and distribution. This segmentation allows the solution to be processed in a straightforward manner while maintaining uniform microstructure formation across the substrate, facilitating scalable production
3Ease of manufacture
If perovskite nanocrystals are used without hydrophilic polymer composite, then manufacturing simplicity is improved, but light emission performance and stability worsen
Solution Approach 1:
The patent creates a composite material system combining perovskite nanocrystals with hydrophilic polymers. The hydrophilic polymer matrix provides structural support, stabilizes the perovskite nanocrystals, and enhances light emission properties while maintaining the simplicity of solution-based processing. This composite approach improves reliability without adding manufacturing complexity
Solution Approach 2:
The hydrophilic polymer acts as an intermediary material that mediates between the perovskite nanocrystals and the surrounding environment. It provides a stable matrix that protects the perovskite nanocrystals from degradation while allowing for simple solution processing, thus improving light emission stability without complicating the 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
This approach enables the production of microstructure arrays and micro light emitting diodes with uniform submicrometer crystal dimensions and enhanced light emission characteristics, while reducing production costs and simplifying the manufacturing process.
Implementation Method 1
obtaining a composite of perovskite nanocrystals and the hydrophilic polymer from the perovskite precursor solution in the plurality of concave micro patterns
Implementation Method 2
first perovskite nanocrystals configured to emit light in a first wavelength region, forming a second microstructure array in which a plurality of second microstructures including second perovskite nanocrystals configured to emit light in a second wavelength region
Data Source
AI summary
Disclosed are a method of manufacturing a microstructure array that includes preparing a mold having a concave micro pattern array in which a plurality of concave micro patterns are arranged, preparing a perovskite precursor solution including a perovskite precursor and a hydrophilic polymer, coating the perovskite precursor solution on a substrate, disposing the mold on the perovskite precursor solution to confine the perovskite precursor solution in the plurality of concave micro patterns, obtaining a composite of perovskite nanocrystals and the hydrophilic polymer from the perovskite precursor solution in the plurality of concave micro patterns, and, and removing the mold to form a microstructure array in which a plurality of microstructures including a composite of the perovskite nanocrystals and the hydrophilic polymer are arranged, a microstructure array, a micro light emitting diode including the same, and a manufacturing method thereof, and a display device.