American University Researches Cheaper and Safer LEDs

According to foreign media reports, researchers at Oregon State University in the United States used a "super acid" much stronger than car batteries to improve the performance of "quantum dots" made of copper indium disulfide. This research is expected to produce cheaper, more secure LEDs.

This latest study was published in the journal Materials Letters. In the study, the researchers developed a method of super acid treatment that can increase the photoluminescence of non-toxic, non-heavy metal quantum dots to a level comparable to that of cadmium selenide.

Quantum dots have been used in optics and electronics for some time. However, due to the toxicity of lead and cadmium they are expensive to manufacture and are not safe for some potential applications (eg biomedical imaging).

Greg Herman, a professor of chemical engineering at Oregon State University, said, "Quantum dots can be used in a variety of products and technologies, but for mass consumer use, the most important thing is to improve LED lighting." "The quantum is now used in the market. Point of luminous nanocrystal television."

Greg Herman also said: "This super acid-treated quantum dot has much better light emission." "There are still some problems that need to be solved, but we have shown that it can improve the lifetime of quantum dots and increase quantum efficiency. Because these quantum dots are non-toxic, they also have potential for use in biomedical applications."