Scientists have developed a new multi color light emitting diode

Scientists at the University of California in the United States Los Alamos National Laboratory has developed a first light emitting diode semiconductor package Hugh Gan colloidal quantum dots completely based on polychromatic inorganic. This result provides a new "hybrid" approach to the development of solid-state lighting. Solid state lighting has low energy consumption and more reliable performance.

According to the latest issue of the scientific journal nano letters reported that scientists first successful show inorganic nano crystal structure based on field emission, semiconductor nanocrystals are used in semiconductor Gan injection layer formed inside the p-n junction characteristics. The new light-emitting diode is the use of a new type of color selection nano emitters, colloidal quantum dots and make full use of gallium nitride manufacturing technology and manufactured.

According to the research of light emitting led the diode nano crystal Klimov, semiconductor nanocrystals Hugh usually also called quantum dots, high emission efficiency of nano light emitter integrated emission color and size control has excellent light resistance and chemical adaptability. The use of nanocrystals in light-emitting diode technology has always been difficult to directly connect the current to the nanocrystals, and we have solved the problem by placing the quantum dots in the gallium nitride injection layer.

The electrical connection to the quantum dots is the secret is used by Mark Hoffbauer and its research team in a technique called energetic neutral atom crystal epitaxy of the ala Moss National Laboratory to develop, this technology can have characteristics of low temperature GaN semiconductor nano package and the impact will not on its luminescent properties. By encapsulating a crystal layer or two crystal layers in different sizes, the researchers have been able to make LEDs emit light in one or two different colors. The working mechanism of these two colors is an important step in creating a white light emitting device.