Boron Nitride Fluorescent Material for Wide Excitation
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Solution Overview
Problem
There is a demand for a fluorescent material that can emit light with various spectra and be excited by a wide wavelength range, while also ensuring reliability and efficiency in light emission characteristics, which existing materials like orthosilicate fluorescent materials do not fully satisfy.
Innovation Solution
A boron nitride fluorescent material comprising alkaline earth metal elements, nitrogen, and optionally rare earth elements like Tb, Sm, Pr, Ce, Mn, and Yb, which is produced through a heat treatment process under low pressure, allowing for light emission peaks in the range of 480 nm to 650 nm when excited by light with peaks between 250 nm and 460 nm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If orthosilicate fluorescent materials are used, then light emission characteristics can be achieved, but the wavelength range for excitation is limited and light emission spectra variety is insufficient
Solution Approach 1:
The patent changes the chemical composition parameters by using boron nitride as the base material instead of orthosilicate, and by incorporating specific rare earth elements (Tb, Sm, Pr, Ce, Mn, Yb) to achieve both wide excitation wavelength range and reliable light emission characteristics
Solution Approach 2:
The patent creates a composite fluorescent material combining boron nitride base material with multiple rare earth element dopants, where each element contributes different emission characteristics, achieving both versatility in excitation range and reliability in emission performance
2Adaptability or versatility
If various light emission spectra are achieved, then adaptability is improved, but manufacturing complexity increases
Solution Approach 1:
The patent performs preliminary mixing of all raw materials (boron nitride, rare earth element compounds, and auxiliary materials) in predetermined ratios before sintering, which simplifies the manufacturing process while achieving complex multi-spectrum emission characteristics
Solution Approach 2:
The boron nitride base material serves multiple functions: it provides structural stability, enables wide excitation absorption, and supports various rare earth element dopants to achieve different emission spectra, reducing the need for multiple separate materials
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 boron nitride fluorescent material achieves efficient and reliable light emission across a wide spectrum, suitable for use in lighting systems and projectors, with improved temperature stability and color tone flexibility.
Implementation Method 1
the boron nitride fluorescent material has at least one light emission peak wavelength in a range of 480 nm or more and less than 650 nm as excited with light having a light emission peak wavelength in a range of 250 nm or more and 460 nm or less
Data Source
AI summary
A boron nitride fluorescent material, having at least one light emission peak wavelength in a range of 480 nm or more and less than 650 nm as excited with light having a light emission peak wavelength in a range of 250 nm or more and 460 nm or less, and comprising: at least one element A selected from the group consisting of alkaline earth metal elements; nitrogen and boron; and optionally at least one element M1 selected from the group consisting of Tb, Sm, Pr, Ce, Mn, and Yb.