Production is possible LEDs quantum dots, known as QLED, but from rice husks? The Japanese do it! The country’s researchers have managed to create one of the most advanced types of technology using only food and organic chemical compounds.

The opening was led by Ken-ichi Saitou of the University of Hiroshima. The researcher noted that rice husks are a source of high-purity silicon dioxide (SiO2), also known as silicon dioxide, and high-quality silicon powder. From this raw material, he produced porous silicon used in various materials. The element has microscopic dots that function like semiconductors and are responsible for the light of the most modern LEDs.

See also: Samsung Introduces New 2022 Micro LED and Neo QLED TVs

“Because typical quantum dots often contain toxic materials such as cadmium, lead, or other heavy metals, environmental concerns are often taken into account when using these nanomaterials,” Saitou commented, according to the Tech Innovation website. “Our process and method for producing quantum dots minimizes these concerns.”

A combination of grinding, heat treatment and chemical pickling has been used to process silica from rice husks. The team responsible for the study crushed the husk and burned its organic compounds, after which they heated the silica powder in an electric furnace to obtain silicon powder by reduction.

The next step was to purify the powder and grind it down to particles with a diameter of three nanometers, thereby functionalizing the surface of the particles to achieve chemical stability. Thus, they were ready to work as luminescent sources.

See also: Samsung leads the TV market for 16 consecutive years

“This method is suitable for the development of environmentally friendly quantum dot LEDs from natural products,” commented Saitou. “By synthesizing high-yield silicon quantum dots from rice husks and dispersing them in organic solvents, it is possible that one day these processes can be implemented on a large scale.”

The LEDs removed from the shells were assembled in several layers to realize the elements that provide electricity conduction and light emission, as well as to cover the plates.

known technology

Despite Saitou’s innovative method, processing rice husks into silica is nothing new. In May 2019, Orysazil of the German Ferrostaal group opened a production plant in Ithaki-RS, which produces about 2,500 tons of silica and energy per month.

QLED, the final result of the Hiroshima University experiment, is widely used in the production of modern televisions. Recently TKL announced the release of the C Series in 2022, two of which take advantage of quantum dot technology and have better performance. Learn more about here.

Comparison of Samsung Neo QLED QN85A and LG OLED CX. What’s the best?
We compared 08 questions and answered which TV is better in GAMES, MOVIES and SPORTS

…..

Source: Technological innovation, Química.com.br