According to the official website of the University of Utah, the university’s engineers recently discovered a novel two-dimensional semiconductor material, tin oxide (SnO), which is only one atom thick and can be used to make transistors that are indispensable in electronic devices. . Researchers said that the latest research will help scientists develop computers that run faster and use less energy, and mobile devices that include smart phones.

Tin Oxide, a “little fresh meat” team led by Ashtosh Tiwari, associate professor of materials science and engineering at the University of Utah, found that it consists of tin and oxygen. At present, transistors and other components in electronic devices are made of three-dimensional materials such as silicon, and a glass substrate contains multiple layers of three-dimensional materials. However, the disadvantage of 3D materials is that electrons will bounce around in all directions within the layer. Tivari explained that the advantage of 2D materials is that they consist of a sandwich of only one or two atoms in thickness, and electrons can only move in the sandwich, so they move faster.

Two-dimensional semiconductor materials began to be a research hot spot five years ago. Although researchers have discovered many kinds of two-dimensional materials such as graphene, molybdenum disulfide, and boron chromene, they only allow negatively charged electrons (N-type). While the manufacture of electronic devices requires both electrons and positively charged “holes” (P-type) motion semiconductor materials, the latest discovered tin oxide is the first stable P-type two-dimensional semiconductor material ever.

Tin oxide materials help scientists develop smaller, faster-running transistors. Computer processors contain billions of transistors. The more transistors on a single chip, the more powerful the processor becomes. Finally, Scientists can produce computers and smart phones that are up to 100 times faster than existing devices. In addition, in this kind of material, since electrons bounce back and forth through one layer instead of inside the three-dimensional material, less friction is generated, so that the processor does not easily become overheated like a conventional computer chip, and its operation needs It also has less energy. This is a great boon for mobile devices that must rely on battery operation, especially medical devices including electronic implant devices.

Tivari said that the model equipment is expected to come out within two or three years. Related research papers were published on the online edition of the "Advanced Materials" magazine published on the 15th. (Reporter Liu Xia)

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