The world's smallest diamond transistor material comes out
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The superior performance of diamonds has made it the new favorite of scientists in the development of next-generation nanoelectronic devices, especially in the new technology fields of terahertz imaging and car collision warning.
The switching gate in the transistor structure controls the current between the two electrical contacts, acting as a switching converter or an amplifier. The smaller the "gate", the higher the efficiency of the transistor. In view of this, the use of materials to develop the "gate" of the transistor has become the focus of the Moran team.
Moran said: Since the invention of the transistor in 1947, it has been used as an important basic material in various modern technologies, from silicon chips for computer processors to gallium arsenide circuits for smart phones, and transistors are everywhere. As a transistor material, both silicon and gallium arsenide are subject to various technical limitations due to their own defects, and diamond is considered to be a perfect transistor material.
Diamond transistor application prospects
Terahertz imaging technology uses the principle of terahertz radiation (T-rays) to image electromagnetic waves between the microwave and infrared bands, which can penetrate clothing and the human body. Due to its non-ionizing properties, this radiation is not harmful to the human body and is widely used in security facilities and medical imaging.
Car collision detection or car radar technology is a technique that uses an efficient radar detection area to determine any car collision events that may occur and to issue an early warning to avoid accidents.
Moran says that both terahertz imaging and automotive radar detection applications require a fast-running, high-powered transistor device that works well in harsh weather and extreme temperatures. The diamond crystal we developed is a high-tech product in view of this.
In addition, the diamond sample used in the study was a CVD diamond supplied by British Element Six. (Compiled from "Scientists develop world's smallest diamond transistor")