Scientists Find New Light Sources for Carbon Nanotube Electroluminescence
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A few days ago, this phenomenon was called electroluminescence. Nano nano is a unit of length, and its length is 10-9th. As a one-dimensional nanomaterial, carbon nanotubes are lightweight, hexagonal structures are perfectly connected, and have many unusual mechanical, electrical, and chemical properties. In recent years, with the deepening of the research of carbon nanotubes and nanomaterials, its broad application prospects have been continuously demonstrated.
This monolayered carbon nanotube-molecule-carbon nanotube (CNT-molecule-CNT) connected solid state electronic device was developed several years ago, but its optical properties are still difficult to detect. Carbon nanotubes contain a pair of metal electrodes, creating a gap of only a few nanometers wide between the electrodes. The location and size of the gaps do not exceed 10 nanometers, and can precisely control the passage of current at the nanometer scale. The carbon nanotubes emit light at a rate of one photon per one billion electrons passed.
The photographed images were overlaid and contrasted, and they determined that this light came from the molecules between the electrodes and could control these points to emit light by controlling the voltage switch. The researchers explained that the nature of the electric field traps the molecule in an electrostatic trap that makes up for the "line" between the two poles. The electrode gap can accommodate one to three such rod-shaped molecules.
This is the first time that electroluminescence has been observed in a CNT-molecule-CNT connection device. The greatest significance of this research is that we successfully built molecules into this kind of head-to-tail structure to create a solid solid-state device, and we can precisely control the size of the gaps and molecules so that it emits light when voltage is applied. Our research also confirms for the first time from the perspective of molecular electronics that the molecules at the device's neutral position have optical signs.
The luminescence of carbon nanotubes has led us to a completely new light source. In the future, this technology may be applied to low-power electronic display screens to replace current TFTs and OLEDs as light sources for display screens. Or is a high-performance light bulb. Or it may provide brand-new ideas for seeking new construction mechanisms for large-scale semiconductor integrated circuits.
In short, carbon nanotubes have many applications in molecular electronics. Researchers are using different molecules to create a variety of devices with different wavelengths of light. This important basic research helps to create miniaturized, high-energy and high-efficiency computers, and broadens the perspective of molecular electronics, such as developing on the basis of single molecules. Optoelectronic components.
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