Perovskite Array Substrate Patterning via Groove-Guided Vapor Conversion
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Solution Overview
Problem
Existing technologies face challenges in patterning perovskite materials at the micro/nano scale due to incompatibility with photoetching and ink-jet printing, leading to issues such as decomposition, poor stability, and high costs, preventing the formation of perovskite micro-array structures.
Innovation Solution
A method involving the formation of a patterned film layer with grooves on a substrate, where a first precursor structure is formed in the grooves, followed by reacting it with a gaseous second precursor to create a perovskite crystal structure, utilizing hydrophilic/hydrophobic properties to enhance adhesion and facilitate boundary definition, compatible with existing manufacturing equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If photoetching or ink-jet printing is used to pattern perovskite materials, then micro/nano scale structures can be formed, but the perovskite materials decompose and stability deteriorates
Solution Approach 1:
The perovskite micro-array structure is divided into multiple independent perovskite crystal structures, each grown in separate grooves on the substrate. This segmentation allows each crystal to be formed independently through vapor-phase deposition, avoiding the decomposition issues associated with conventional patterning methods while maintaining micro-scale precision.
Solution Approach 2:
A patterned film layer is introduced as an intermediary structure between the substrate and the perovskite crystals. This film layer with grooves serves as a template that guides the vapor-phase deposition process, enabling precise patterning without direct contact between the perovskite material and the patterning equipment that would cause decomposition.
2Ease of manufacture
If conventional patterning methods are used, then manufacturing processes can be simplified, but equipment costs increase and perovskite micro-array structures cannot be formed
Solution Approach 1:
The invention replaces mechanical patterning methods (photoetching, ink-jet printing) with a vapor-phase deposition process. This substitution eliminates the need for complex mechanical patterning equipment while maintaining the ability to form precise micro-array structures through controlled vapor deposition onto the patterned film layer template.
3Manufacturing precision
If perovskite materials are patterned at micro/nano scale, then array substrate performance is improved, but manufacturing costs increase due to equipment requirements
Solution Approach 1:
The patterned film layer with grooves serves as a disposable template that enables precise micro-array formation without requiring expensive specialized equipment. The template can be fabricated using conventional low-cost techniques, and the vapor-phase deposition process uses simple, widely available equipment, significantly reducing manufacturing costs while achieving micro-scale 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
Enables the formation of perovskite micro-array structures with improved fluorescence properties, optimizing array substrate performance and reducing manufacturing costs by avoiding the need for expensive equipment.
Implementation Method 1
disposing, in an environment of a gaseous second precursor, the substrate on which the first precursor structure is formed, such that the gaseous second precursor is reacted with the first precursor structure to form a perovskite crystal structure
Implementation Method 2
acquiring a first precursor seed nucleus by precipitating a solute of the first precursor solution having the first concentration in the groove
Implementation Method 3
disposing, in a first precursor solution having a second concentration, the substrate on which the first precursor seed nucleus is formed, such that the first precursor seed nucleus grows up to form the first precursor structure
Implementation Method 4
one of a target side of the substrate and the patterned film layer is hydrophilic, and the other of the target side of the substrate and the patterned film layer is hydrophobic, wherein the target side of the substrate is the side, on which the patterned film layer is formed, of the substrate; and the groove is communicated with the substrate, hydrophilicity or hydrophobicity of the first precursor solution is the same as hydrophilicity or hydrophobicity of the target side of the substrate and is opposite to hydrophilicity or hydrophobicity of the patterned film layer
Data Source
AI summary
A method for manufacturing an array substrate includes: forming a patterned film layer on a side of a substrate, wherein the patterned film layer is provided with a plurality of grooves; forming a first precursor structure in the groove, wherein a material of the first precursor structure includes a first precursor; and disposing, in an environment of a gaseous second precursor, the substrate on which the first precursor structure is formed, such that the gaseous second precursor is reacted with the first precursor structure to form a perovskite crystal structure; wherein one of the first precursor and the gaseous second precursor includes a metal halide, and the other of the first precursor and the gaseous second precursor includes one of a formamidine halide, a methyl-amine halide, a cesium halide, and a hydrogen sulfide.