White LED can soon be put on the throne as the world goes to the light source from another is very good in the sense of direction. As a next-generation optical control (Nanoantennas are looking for a bright future) technology, a photonic crystal or nanoantenna is a two-dimensional material in which nanoparticles are arranged in time in the substrate. During irradiation, the combination of nanoantenna and phosphor plate receives a good mixture of blue and violet light.
White LEDs have been modified in the form of white laser diodes, or LDs, with yellow phosphors and blue LDs. Although the blue LDs are highly conductive, the yellow phosphor shines in all directions, causing unwanted color mixing.
To resolve this problem, the researchers have developed (Nanoantennas are looking for a bright future) phosphus and nanoantennas use metals, allows photoslimines. Aluminum Nanoparticles disperse well and improve strength on how light; However, aluminum also enjoy light, reducing production. This is a big hit, especially with high-end lighting equipment.
Now, a team of researchers from Kyoto University has succeeded in increasing continuous photoluminescence by replacing aluminum with a better material.
“Titanium dioxide became a better choice because of its high reflectivity and low heat absorption,” says Shunsuke Murai, the author of the paper.
Although the light scattering power of titanium oxide initially appeared to be lower than that of aluminum alloy, the team used computer simulations to design a better nanoantenna.
“These new phosphor nanoantennas are useful for bright but energy-efficient solid-state lighting because they can prevent temperature rise during melting,” says Murai. say.
“During the process of finding the best part, we were surprised to find that the most important phosphor gave a bright photoluminescence, showing how to make a bright light bulb work perfectly. “
