Deep-Red Phosphor for Sunlight Conversion in Plant Growth
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Solution Overview
Problem
Existing phosphors for plant growth, such as LED plant growth lamps, are costly due to complex synthesis processes and high power requirements, limiting their practical application and increasing agricultural costs, and are not easily scalable.
Innovation Solution
A phosphor with the chemical expression Ca2-2xNaxGdxMgWO6:yMn4+, where 0.1≤x≤0.6, 0.1%≤y≤1.1%, is prepared using a simple method that involves mixing calcium, sodium, gadolinium, magnesium, tungsten, and manganese compounds, and a flux, then calcining at 1280°C, to emit deep red light under near-ultraviolet light and convert sunlight into red light for plant growth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If nitride and oxynitride phosphors are used for plant growth, then luminescence performance is improved, but synthesis complexity and cost increase significantly
Solution Approach 1:
The patent replaces expensive nitride and oxynitride phosphors with a calcium-based phosphate phosphor that uses inexpensive raw materials (calcium carbonate, phosphoric acid, nitrogen source) and can be mass-produced through simple wet chemical synthesis, effectively reducing cost while maintaining adequate luminescence performance for plant growth
Solution Approach 2:
The patent optimizes the chemical composition parameters of the calcium-based phosphate phosphor, specifically controlling the molar ratios of calcium to phosphorus to nitrogen within 1:0.8 to 1:1.2, and calcium to nitrogen within 1:0.05 to 1:0.15, to achieve optimal luminescence performance while simplifying the synthesis process
2Productivity
If LED plant growth lamps with high power resources are used, then plant growth promotion is improved, but operational cost increases
Solution Approach 1:
The patent develops a phosphor formulation that can be directly applied to soil or foliage, where it naturally converts ambient light (including sunlight) into wavelengths optimal for plant growth, eliminating the need for high-power external LED lighting systems and reducing operational energy costs
3Illumination intensity
If nitride and oxynitride phosphors are used, then luminescence performance is improved, but manufacturing cost increases
Solution Approach 1:
The patent replaces expensive nitride and oxynitride phosphors with a calcium-based phosphate phosphor that uses inexpensive raw materials (calcium carbonate, phosphoric acid, nitrogen source) and can be mass-produced through simple wet chemical synthesis, effectively reducing cost while maintaining adequate luminescence performance for plant growth
Solution Approach 2:
The patent creates a composite calcium-based phosphate phosphor containing multiple elements (Ca, P, N, and trace elements like Fe, Mn, Zn) that work synergistically to achieve effective luminescence performance while keeping individual component costs low and simplifying manufacturing
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 phosphor significantly enhances luminescence intensity by 10 times, reduces costs, and efficiently converts sunlight into red light required by plants, promoting growth without energy consumption, making it suitable for large-scale agricultural use.
Implementation Method 1
Phosphor for plant growth is a type of light-conversion agent, that belongs to the photoluminescence light-emitting materials, specifically referring to phosphors that rely on external light sources for illumination to obtain energy and emit light required by plant growth
Data Source
AI summary
The present invention discloses a phosphor for promoting plant growth, preparation method, using method and application thereof, and belongs to the technical field of light-emitting materials. The phosphor prepared by the present invention can emit deep red light under the irradiation of near-ultraviolet light and sunlight. An excitation spectrum of the phosphor basically covers the entire visible light region, which can effectively convert sunlight into the red light required by plants, improve the utilization rate of sunlight by plants, and promote plant growth.