Recently, a research team led by Ren Tianling, a professor of micro-nanoelectronics at Tsinghua University, recently produced new luminescent materials from two different types of graphene. The first luminescence system based on graphene materials proves that it can be adjusted with only one LED Light of different colors covers almost all the colors of the entire visible spectrum.

The color and wavelength of the light emitted by the LEDs are determined by the luminescent material, and once the preparation is completed, the two properties are determined. So far, the idea of ​​changing the color of a light with one LED is hard to come by. Adjustable graphene LEDs developed by Nintendin's research group cover red light from 450 nm to 750 nm, except for dark blue and violet.

The key material for LED with adjustable color is graphene, and some achievements have been made from solar cells to semiconductors and graphene as emerging materials, but LED lamps previously made from this material have not achieved color-adjustable until this time Researchers will become a reality.

In the conventional display or illumination technology, the existing LED devices represent colors or white light by adjusting the brightness of the fixed red, green and blue light emitting units. This ground-breaking research effort not only achieves color fidelity, but also significantly reduces the number of light-emitting cells in a display device, greatly optimizing the circuit and reducing power consumption.

According to a recent report by Tsinghua University News Network, this new type of LED has broken through the color synthesis of existing display devices and is expected to have a revolutionary impact on displays, lighting fixtures and communication technologies. Because the color of light changes with specific chemicals, such devices may also be used to make special sensors. Paper reviewer evaluation: "This work is expected to expand in the field of light-emitting devices to develop new research directions," "This work is exciting and influential."

The research is published online in Nature Newsletter. Wang Yumu, a postdoctoral fellow at Yale University, and Tian He, a Ph.D. graduate in micro-nanoelectronics at Tsinghua University, co-authored the paper.

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