Perovskite Curable Composition Quantum Yield Maintenance
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Solution Overview
Problem
There is a need for a curable composition that maintains a high quantum yield after curing, particularly for applications involving perovskite compounds, to ensure effective light emission properties in display apparatuses.
Innovation Solution
A curable composition comprising fluorescent particles with perovskite compounds, photopolymerizable compounds, and photopolymerization initiators, where the absorbance of the initiator at 365 nm is optimized to maintain quantum yield, along with optional quantum dots and dispersing agents, to form a film with enhanced light emitting properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If photopolymerization initiator concentration is increased to improve curing efficiency, then curing speed increases, but quantum yield maintenance rate decreases
Solution Approach 1:
The patent optimizes the concentration ratio of photopolymerization initiator to fluorescent particle within the range of 5.0×10^-6 ≤ (AbC×MC)/MA ≤ 1.0, where AbC is absorbance at 365 nm, MC is initiator content, and MA is fluorescent particle content. This parameter optimization balances curing efficiency with quantum yield maintenance, preventing excessive initiator concentration from degrading the perovskite compound while ensuring adequate curing.
Solution Approach 2:
The patent employs a moderate amount of photopolymerization initiator rather than excessive amounts, using just enough to achieve effective curing while minimizing harmful effects on the fluorescent particles. This partial action approach prevents over-curing that would degrade the perovskite compound and maintain high quantum yield.
2Power
If photopolymerization initiator absorbance at 365 nm is increased to improve photoirradiation efficiency, then curing effectiveness increases, but quantum yield maintenance decreases
Solution Approach 1:
The patent selects photopolymerization initiators with specific absorbance characteristics at 365 nm and optimizes their concentration to achieve the balance expressed in the formula 5.0×10^-6 ≤ (AbC×MC)/MA ≤ 1.0. This ensures adequate photoirradiation efficiency for effective curing while preventing excessive absorbance that would indicate too high initiator concentration, which would degrade quantum yield maintenance.
3Illumination intensity
If perovskite compound concentration is increased to improve fluorescence intensity, then light emission brightness increases, but quantum yield stability after curing decreases
Solution Approach 1:
The patent optimizes the concentration ratio of perovskite compound within the specified formula range, balancing fluorescence intensity with stability. By controlling the ratio (AbC×MC)/MA to be within 5.0×10^-6 to 1.0, the patent ensures adequate fluorescent particle content for high light emission while preventing excessive concentration that would compromise quantum yield stability after curing.
Solution Approach 2:
The patent creates a composite curable composition containing perovskite compounds, photopolymerizable compounds, and photopolymerization initiators in optimized proportions. This composite structure allows the perovskite particles to maintain high fluorescence intensity while the optimized matrix composition protects them during curing, preserving quantum yield stability.
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 composition achieves a high maintenance rate of quantum yield after curing, ensuring superior light emitting properties and optical characteristics for display applications, such as LED technology.
Implementation Method 1
a photopolymerization initiator (C), wherein the following expression (I) is satisfied: 5.0×10−6≤(AbC×MC)/MA≤1.0
Implementation Method 2
AbC represents an absorbance of the photopolymerization initiator (C) at a wavelength of 365 nm
Implementation Method 3
a fluorescent particle (A) containing a perovskite compound, wherein the maintenance rate of the quantum yield after curing the curable composition by photoirradiation to form a cured film relative to the quantum yield before forming the cured film is high
Data Source
AI summary
An object of the present invention is to provide: a curable composition comprising a fluorescent particle containing a perovskite compound, wherein the maintenance rate of the quantum yield after curing the curable composition by photoirradiation to form a cured film relative to the quantum yield before forming the cured film is high; a film formed by curing the curable composition; and a laminated body and a display apparatus comprising the film. Provided are: a curable composition comprising a fluorescent particle (A) containing a perovskite compound, a photopolymerizable compound (B), and a photopolymerization initiator (C), wherein the expression: 5.0×10−6≤(AbC× MC)/MA≤1.0 is satisfied, wherein MA [% by mass] represents the content of the fluorescent particle (A) and MC [% by mass] represents the content of the photopolymerization initiator (C) in 100% by mass of the solid content of the curable composition, and AbC represents the absorbance of the photopolymerization initiator (C) at a wavelength of 365 nm and at a concentration of 1 mg/100 mL; a film formed by curing the curable composition; and a laminated body and a display apparatus comprising the film.