Successfully developed ultra-thin semiconductor films

With a breakthrough in the process of producing ultra-thin films at the atomic level, scientists have set the stage for the emergence of transparent LED screens, High performance and, of course, super small transistors which will be applied in many different fields.

Successfully manufactured ultra-thin semiconductor films

The technique that researchers at UC Berkeley and Lawrence Berkeley National Laboratory have developed successfully is simply using an organic acid to process monolayer semiconductor materials. from molybdenum disulphide (MoS ₂ ) . In this way, they can increase the luminescent efficiency of this film by 5,000 times, from 1% to 100%.

Professor Ali Javey, UC Berkeley, principal investigator for the project, said: "This is the first time that a perfect monolithic photoluminescence plate can be made and the material is as thin as ever before." .

The super-monocoalic left semiconductor semiconductor layer, on the right, has undergone ultrasonic processing to improve its perfection.

In fact, the team created layers of MoS ₂ with a thickness of only 7/10 nanometers, even thinner than a human fear of DNA with a diameter of only about 2.5 nanometers. Soaking these MoS ₂ layers in the super-acid will destroy the impurities in its structure, and fill the missing atoms with a chemical reaction called protonation to produce fineness. optimal optimization.

Single-mode semiconductor devices with low light absorption capability can withstand torque, bending, and other stresses at the same time, making them ideal for devices that require transparency and versatility. . Imagine a high-performance LED display that can deform, during power off, and so on.

On the other hand, ultra-acid treatment also improves the performance of transistors by removing defects in its structure, creating a premise for developing smaller and thiner computer chips. than.