Delta-Phase Perovskite Synthesis via Low-Temperature Organic Precursors
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Solution Overview
Problem
Conventional methods for synthesizing perovskite crystals have low yield and high impurity levels, limiting mass production and increasing costs.
Innovation Solution
A method involving the use of specific organic anion and metal ion precursors, dissolved in a solvent and heated, followed by the introduction of an anti-solvent and subsequent washing and drying steps to produce delta-phase perovskite crystals with high yield and purity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional high-temperature synthesis method is used, then perovskite crystal can be obtained, but the yield is low and mass productivity is limited
Solution Approach 1:
The invention changes the synthesis parameters by using a low-temperature solution method (20-110°C) instead of conventional high-temperature synthesis, and by changing the precursor from AX to organic anion precursor (HX where X is halogen), achieving both high yield and mass productivity
2Manufacturing precision
If conventional synthesis method is used, then perovskite crystal can be produced, but unwanted by-products are generated and purity is reduced
Solution Approach 1:
The invention extracts and eliminates the problematic AX precursor synthesis step that generates by-products, by directly using organic anion precursor (HX) in the synthesis reaction, thereby producing high-purity perovskite crystal with minimal by-products
Solution Approach 2:
By changing the precursor type and synthesis temperature parameters, the reaction pathway is optimized to minimize by-product formation and maximize product purity
3Reliability
If inorganic semiconductor-based solar cells are used, then high conversion efficiency is achieved, but manufacturing cost increases due to expensive materials and processing equipment
Solution Approach 1:
The invention replaces expensive inorganic semiconductor materials with low-cost perovskite materials that can be synthesized from inexpensive organic anion precursors and metal ion precursors using simple solution processing, dramatically reducing manufacturing cost while maintaining high conversion efficiency
Solution Approach 2:
By changing from inorganic semiconductor synthesis to organic-based perovskite synthesis, the material cost and processing equipment requirements are significantly reduced while maintaining or improving 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 a yield of at least 75% and purity of 99% or higher, enabling efficient mass production of delta-phase perovskite crystals suitable for use in solar cells and other applications.
Implementation Method 1
Step 2 of heating the reaction solution to 20 to 110 °C, and when the reaction solution turns yellow
Implementation Method 2
introducing an anti-solvent to obtain a solution containing a precipitate
Implementation Method 3
introducing an organic anion precursor represented by Chemical Formula 1 below and a metal ion precursor represented by Chemical Formula 2 below into the solvent and dissolving the same to prepare a reaction solution
Implementation Method 4
introducing an anti-solvent to obtain a solution containing a precipitate
Implementation Method 5
Step 3 of removing a colorless solution from the solution containing the precipitate of Step 2, and then performing primary washing of the precipitate with a bad solvent; Step 4 of performing secondary washing of the precipitate, which has undergone the primary washing, with an ether-based solvent
Implementation Method 6
Step 5 of drying the filtrate to obtain a delta-phase perovskite crystal
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The present invention relates to a method for producing a delta-phase perovskite crystal, and more specifically, to a novel method for synthesizing a delta-phase perovskite crystal at high yield and to a delta-phase perovskite crystal manufactured using same.