The National University of Singapore as Reuters scientists developed energy-emitting diode thin (Llight Emitting Diode, LED), for next-generation communication technology is expected.
For message processing technology, it is important to completely convert electrical signals into optical signals. If you want to transfer a large amount of information, you need to integrate energy-saving and high-speed LEDs on the chip.
Since the two-dimensional structure of graphene-like crystal has only a carbon atom thickness, has a clear luminescent property, and can be placed on a microchip, it has become a very popular semiconductor material in recent years. At present, the research team has made LEDs using graphene-like materials. However, only some of the current is converted into light, and most of them are converted into heat dissipation. It is still a challenge to achieve high efficiency of LEDs.
Goki Eda, professor of the Department of Physics and Chemistry at the National University of Singapore, led the research team to develop a high-performance ultra-thin LED that contains only a few layers of carbon atoms, which effectively reduces the energy lost by the LED in the electro-optical effect. The team found that energy loss can be significantly reduced by preventing current leakage from the Emissive Layer (EML) to the Metal Electrodes.
Studies have shown that a few nanometers of insulation can suppress current leakage without the need for additional resistance. By using extremely thin insulators, the team drastically reduced the current required to trigger LED light by 10,000 times less than two-dimensional semiconductor LEDs.
Professor Eda said, “Because our design ensures that the least amount of power is wasted, the equipment can operate at very low currents, and this technology will have a great impact on future communication technologies.â€
Editor: Yan Zhixiang
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