Preparation method and application of amino acid-based perovskite fluorescent powder with high fluorescence quantum yield
A co-precipitation method using amino acids as passivating agents in a water-ethanol solvent system to prepare perovskite phosphors solves the problems of low efficiency and poor stability in traditional methods, achieving efficient and environmentally friendly perovskite phosphor preparation suitable for white LEDs.
CN121914720APending Publication Date: 2026-04-24SHANDONG UNIV OF SCI & TECH
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Patent Information
- Application Number
- CN202610050705.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-15
- Publication Date
- 2026-04-24
AI Technical Summary
Technical Problem
Existing perovskite phosphors suffer from low synthesis efficiency, poor stability, and reliance on toxic organic solvents, making it difficult to meet the needs of green industrial production.
Method used
Perovskite phosphors are prepared by co-precipitation using a water-ethanol green solvent system and amino acids as passivating agents, avoiding the use of toxic organic solvents and precious metals. The preparation process is environmentally friendly and low-cost.
Benefits of technology
This significantly improves the photoluminescence quantum yield and stability of perovskite phosphors, reduces production costs, and provides a feasible path for industrial applications.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention discloses a preparation method and application of high-fluorescence quantum yield perovskite fluorescent powder based on amino acid, and belongs to the technical field of luminescent materials and display, the preparation method is used for preparing the perovskite fluorescent powder, and the preparation method comprises the following steps: dissolving potassium bromide in deionized water, then adding lead bromide, and carrying out ultrasonic dissolution to obtain a first solution; dissolving cesium bromide in another deionized water to obtain a second solution; mixing the first solution and the second solution, and standing to obtain a mixed solution; dropwise adding the mixed solution into absolute ethyl alcohol, and stirring to obtain a precursor solution; adding amino acid into the precursor solution, and stirring to obtain a precursor reaction suspension; and centrifuging the suspension, collecting the precipitate, centrifugally washing the precipitate with absolute ethyl alcohol, and drying the washed precipitate to obtain the perovskite fluorescent powder. The invention provides a green synthesis method of a water-ethanol system, which is combined with an amino acid synergistic passivation effect to realize low-cost preparation and improvement of luminous efficiency.
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