Researchers are developing technology of color-cross-cross-conversion nanoparticles for the quality of ultra-high RGB display

Dr. Ho Seong Jang and his colleagues from the Extreme Materials Research Center of Korea Institute of Science and Technology (KIST) have developed an ascending conversion nanoparticles technology which introduces a nanostructure based on multiple shells, a multilayer structure in multiple layers of shells surrounds a central Nanoparticle particle, and High color of the light of light in light.

The work is published in the newspaper Advanced functional materials.

Luminescent materials are materials that light up alone and are used in a variety of display The devices, including televisions, tablets, monitors and smartphones, allow us to visualize a variety of images and videos. However, flat screens in two conventional dimensions cannot entirely transmit the three -dimensional dimensionality of the real world, limiting the sense of depth.

The film “Avatar” attracted a lot of attention to its 3D images, but the public had to wear special glasses to feel the meaning of depth, and 3D displays without glasses were developed to resolve this drawback, but they have the disadvantage of causing eye fatigue.

To solve these problems, three -dimensional volumetric display technology is being research. It is a new generation display technology that implements three -dimensional image information in a three -dimensional space, which requires initial conversion nanoparticles that absorb infrared light and emit visible light.

In particular, nanoparticles of ascending conversion which can emit the three primary colors of light (R), green (G) and blue (B) – of a single nanoparticle are necessary, but existing materials emit a single color from a single nanoparticle or, even if a R / G / B emission is possible, a light is low or the range of colors is limited due to a range of colors is limited. narrow.

Kist researchers checked the composition of the nucleus and shell materials to induce R / G / B luminescence of a single nanoparticle, and applied three Light Light Light Lights to produce R / G / B luminescence at different excitation wavelengths.

In particular, they designed the nucleus to emit green lightThe inner shell to emit a red light, and the exterior shell to emit blue lightAchieving high -color purity and a high intensity of luminescence of the R / G / B luminescence in a single nanoparticle.

The nanoparticles developed by the researchers can make different colors by simultaneously applying several lengths of light in infrared light, reaching a range of wide colors of 94.2% of the NTSC color space and 133% of the SRGB colorimetric space.

Researchers have also demonstrated the possibility of carrying out 3D volumetric displays using updating converting nanoparticles by manufacturing transparent composites of nanoparticles-polymers to display various color images.

“Ascending conversion nanoparticles that can absorb close infrared light and produce a high color reproductive color luminescence will allow the marketing of 3D volumetric screens which can allow us to view real 3D images. nanoparticles Can be used not only in the display field but also as a security equipment to prevent counterfeiting and falsification, “said Dr. Ho Seong Jang.