Organic-Inorganic Hybrid Perovskite Layer Formation
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Solution Overview
Problem
Existing methods for developing organic-inorganic hybrid perovskite layers face challenges in achieving controlled composition, scalability, and compatibility with textured substrates, particularly in industrial settings.
Innovation Solution
A two-step process using Close-Spaced Sublimation (CSS) or Close-Spaced Vapor Transport Deposition (CSVTD) to form layers of organic-inorganic hybrid perovskites, where the first step involves depositing inorganic precursors and the second step involves reacting organic precursors with the inorganic precursors to form the perovskite material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If liquid means or co-evaporation is used to deposit inorganic precursors, then the perovskite layer can be formed, but production rates are low and homogeneity over large surfaces is poor
Solution Approach 1:
The invention changes the deposition method from liquid means or co-evaporation to close-spaced vapor transport deposition (CSVTD), altering the physical state and transport mechanism of precursors. CSVTD uses vapor phase transport with controlled temperature gradients to achieve both high deposition rates and uniform composition across large surfaces, resolving the contradiction between productivity and manufacturing precision.
Solution Approach 2:
The invention replaces mechanical/liquid deposition systems with a vapor-phase transport system. CSVTD uses thermal energy to sublime precursors and transport them as vapor, eliminating the limitations of liquid handling and mechanical co-evaporation, thereby achieving both high speed and uniformity.
2Adaptability or versatility
If liquid means or co-evaporation is used to deposit inorganic precursors, then the perovskite layer can be formed, but deposition on textured substrates is problematic
Solution Approach 1:
The invention changes the deposition approach to CSVTD, where vapor-phase precursors can conformally deposit on textured substrates due to their ability to navigate surface features. The vapor transport mechanism allows uniform coverage of complex geometries while maintaining high deposition rates, unlike liquid methods that struggle with substrate wetting and coverage.
3Ease of manufacture
If liquid means or co-evaporation is used to deposit inorganic precursors, then the perovskite layer can be formed, but management of liquid effluents becomes difficult
Solution Approach 1:
The invention replaces liquid-based deposition with vapor-phase CSVTD, eliminating liquid effluent generation entirely. The vapor transport process produces no liquid waste streams, simplifying environmental management and compliance while maintaining high productivity through rapid vapor deposition.
4Manufacturing precision
If two-step process with separate inorganic and organic deposition is used, then composition control is achieved, but deposition time is extended
Solution Approach 1:
The invention merges the deposition of inorganic and organic precursors into a single CSVTD process step. Both types of precursors are co-sublimed and co-deposited simultaneously onto the substrate, achieving controlled composition through precise control of precursor ratios and deposition conditions, while reducing total deposition time compared to sequential two-step methods.
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 process allows for the rapid formation of perovskite layers with controlled composition on large surfaces and textured substrates, enabling industrial scalability while maintaining high homogeneity and low material loss.
Implementation Method 1
The CSS step consists of sublimating a solid material
Implementation Method 2
The CSVTD step consists of sublimating a solid material or evaporating a liquid material
Implementation Method 3
This impregnation results from the reaction of the inorganic precursors with the gaseous phase resulting from the evaporation or sublimation of the organic precursors
Implementation Method 4
The CSVTD step consists of sublimating a solid material or evaporating a liquid material
Implementation Method 5
the organic precursors react with the inorganic precursors present in the layer and a layer of organic-inorganic hybrid perovskite material is obtained
Data Source
Figure 1A~3
Figure 4A~4B
Figure 5A~6
AI summary
This description relates to a process for preparing a layer of organic-inorganic hybrid perovskite material comprising the following steps: a) Formation of a layer (11) comprising the inorganic precursors of the perovskite material on a substrate (10) by CSS or CSVTD, b) Implementation of a CSS or CSVTD step from organic precursors (22, 24), whereby the organic precursors (22, 24) react with the layer (11) of inorganic precursors and a layer (12) of organic-inorganic hybrid perovskite material is obtained.