Korea r&d without phosphor white leds is expected to be used for display

( Reading] Media reported that South Korea science and technology ( 韩科院) Professor of physics research team successfully developed a phosphor white LED technology, are expected to apply in the next generation lighting and display. It is understood that the related research results have been published in the online journal nature. Han Guoyan. 。 。

media reported that South Korea science and technology ( 韩科院) Professor of physics research team successfully developed a phosphor white LED technology, are expected to apply in the next generation lighting and display. It is understood that the related research results have been published in the online journal nature.

South Korea developed without phosphor white leds

at present most of the white leds are on the blue leds combined with yellow phosphor, or tied for a variety of colors of leds to create white leds. But yellow phosphor is a rare earth material, must rely on imports, and lower color, also have the possibility of change color. And a variety of color combinations of leds cost is high.

KAIST team to solve this problem, to replace phosphor semiconductor chips. Across the top pyramid structure of concentric circles shape, designed to composite structure. To create the 3 d structure of the surface in different conditions to form quantum well ( 量子井) , each a different color.

the team instructions, adjust the manufacturing time and conditions of the 3 d structure, to change the crystal surface area, the method of producing multivariate mixed color leds.

the team also found can high-expansion microscope is used to measure the 3 d structure internal degree of current injection method. As long as the method developed can effectively injection current, LED device efficiency and color can be adjusted by degrees.

the r&d team, said the future through 3 d semiconductor process research and development, improve efficiency, create do not use the low price, the color of phosphor to reproduce with high degrees of single chip white light source.