Perovskite Microstructure Array Manufacturing via Molded Nanocrystals
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Solution Overview
Problem
Current technologies face challenges in achieving improved performance in microstructure arrays and micro-light-emitting diodes, particularly in terms of uniformity and efficiency of light emission.
Innovation Solution
A method of manufacturing a microstructure array using red, green, and blue light-emitting perovskite precursor solutions, which involves coating these solutions on a partitioned substrate, disposing a mold with concave micro-patterns, and heat-treating to form perovskite nanocrystals, resulting in a microstructure array with uniform microstructures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional coating methods are used to form perovskite precursor films, then the manufacturing process is simple, but the thickness uniformity of microstructures is poor
Solution Approach 1:
The substrate is pre-partitioned into first, second, and third regions before coating, with each region designated for a specific color perovskite. This preliminary partitioning ensures that each microstructure receives the correct precursor material, improving thickness uniformity and color purity without requiring complex post-processing steps.
Solution Approach 2:
Different spin-coating rates are applied to different regions of the substrate. The first region (red perovskite) is coated at a first spin-coating rate, the second region (green perovskite) at a second spin-coating rate, and the third region (blue perovskite) at a third spin-coating rate. This localized control of coating parameters ensures optimal thickness uniformity for each color while maintaining overall process efficiency.
2Manufacturing precision
If high spin-coating rates are used to minimize thickness differences, then the manufacturing precision improves, but the loss of time increases
Solution Approach 1:
The spin-coating rate parameter is optimized for each region based on the specific requirements of each color perovskite. By adjusting the spin-coating rates (first, second, and third rates respectively), the method achieves minimal thickness differences without requiring excessively high speeds for all regions, thus balancing precision with time efficiency.
3Reliability
If uniform microstructures are formed with minimal thickness differences, then the light-emitting performance improves, but the manufacturing complexity increases
Solution Approach 1:
The substrate is segmented into distinct first, second, and third regions, each dedicated to a specific color perovskite coating process. This segmentation allows for optimized coating parameters in each region while maintaining overall process integration, improving light-emitting performance without requiring overly complex manufacturing steps.
Solution Approach 2:
The spin-coating process serves multiple functions simultaneously: it deposits the perovskite precursor material, controls the film thickness through rotation speed, and ensures uniform distribution across each region. This multi-functionality reduces the need for additional separate processing steps, maintaining manufacturing simplicity while achieving high performance.
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 achieves improved uniformity and performance of the microstructure array, leading to enhanced light emission characteristics and reduced thickness differences between red, green, and blue microstructures.
Implementation Method 1
spin-coating the red light-emitting perovskite precursor solution, the green light-emitting perovskite precursor solution, and the blue light-emitting perovskite precursor solution
Implementation Method 2
heat-treating the red light-emitting perovskite precursor film, the green light-emitting perovskite precursor film, and the blue light-emitting perovskite precursor film
Implementation Method 3
heat-treating the red light-emitting perovskite precursor film, the green light-emitting perovskite precursor film, and the blue light-emitting perovskite precursor film in the plurality of concave micro-patterns to obtain each of red light-emitting perovskite nanocrystals, green light-emitting perovskite nanocrystals, and blue light-emitting perovskite nanocrystals
Data Source
AI summary
A method of manufacturing microstructure array, a microstructure array, a micro-light-emitting diode, and a method for manufacturing the same, and a display device. The method of manufacturing microstructure array includes: preparing a red light-emitting perovskite precursor solution, a green light-emitting perovskite precursor solution, and a blue light-emitting perovskite precursor solution; coating the red light-emitting perovskite precursor solution, the green light-emitting perovskite precursor solution, and the blue light-emitting perovskite precursor solution, on a substrate having partitioned first, second, and third regions to form a red light-emitting perovskite precursor film, a green light-emitting perovskite precursor film, and a blue light-emitting perovskite precursor film, respectively; disposing a mold having a plurality of concave micropatterns on the red light-emitting perovskite precursor film, the green light-emitting perovskite precursor film, and the blue light-emitting perovskite precursor film, respectively; heat-treating the red light-emitting perovskite precursor film, the green light-emitting perovskite precursor film, and the blue light-emitting perovskite precursor film in a plurality of concave micropatterns to obtain each of red light-emitting perovskite nanocrystals, green light-emitting perovskite nanocrystals, and blue light-emitting perovskite nanocrystals, and removing the mold to form a microstructure array.