[Yearly Meeting] There are research rare earths: domestic LED phosphors have a long way to go
[Text / high-tech LED Gan Qin] With the emergence of new technologies, new processes and new application features in the field of LED lighting, the technological innovation of LED phosphors is far from over.
Liu Ronghui, director of the Rare Earth Luminescence Materials Division, pointed out that improving the LED package device's light efficiency, improving the light color quality and reducing the packaging cost through the innovation of phosphor technology is the eternal theme of the development of LED phosphor technology.
Liu Ronghui said that in the future, in the field of lighting, aluminate yellow-green phosphors and nitride red phosphors with high light efficiency and color rendering properties are currently irreplaceable, while in the field of LED backlights, nitrogen oxide green phosphors and new types Non-nitride red phosphors will be rapidly developed and applied.
In addition, China's LED phosphors started from the semiconductor lighting industry, and patent issues have always been an important issue that plagued domestic LED packaging and application companies.
Liu Ronghui said that although the development of LED phosphors in China started late, the application of downstream industries has been at the forefront of the world. This requires that the performance of domestic LED phosphors must approach or reach international standards as soon as possible, otherwise the development of China's LED industry will be subject to people.
In the research of rare earth through technological innovation, the use of divalent metal doping to replace the rare earth matrix elements in the aluminate material and the use of low-cost anions for valence compensation, not only improve the performance of the phosphor, but also from the garnet structure green and yellow fluorescence The composition of the powder broke through the Japanese patent restrictions and applied for a device patent.
In addition, the research and development of rare earths has also taken the lead in the industry to achieve the industrial development of high-color lighting nitride red powder, breaking the market monopoly and abnormally high prices of foreign companies, providing an important and reliable material guarantee for the development of domestic downstream LED enterprises.
Liu Ronghui concluded that although domestic LED phosphors have achieved extraordinary development in recent years, there are still many shortcomings. First, the basic research on new materials involved in enterprises is insufficient. Among them, nitride and NOx phosphor cores have great application prospects. Patents and key preparation techniques have not yet been fully broken.
Secondly, unlike foreign LED packaging companies and phosphor companies to jointly carry out technological innovation, China has not yet formed a close cooperation and development of upstream and downstream industries. Liu Ronghui said, “There are research and development of rare earths and domestic LED packaging leading enterprises. Technology development to accelerate the advancement of phosphors and downstream technologies."
In addition, domestic enterprises have insufficient grasp of the development trend of the latest technology of semiconductor lighting, and the original results of LED industry chains including LED phosphors are insufficient. China LED phosphors and their downstream industry innovation still have a long way to go.
Then, what technical innovations and product performance breakthroughs will be made in the future phosphors? At the 2015 High-tech LED Annual Meeting, there will be research rare earths to discuss with you, so stay tuned!
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