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The orange light emitted by the quantum dots can be seen under the microscope and displayed as the letter OSU (Oregon State University).
Quantum dots have had a wide commercial impact on LED technology. Now, improving their manufacturing steps and increasing profits are the focus of research. According to the website of the American Institute of Electrical and Electronics Engineers "Spectral" magazine, researchers at Oregon State University have recently demonstrated a new quantum dot manufacturing technology that not only guarantees the consistent size and shape of the manufactured quantum dots, but also More precise color control may mean the advent of a new era of LED lighting.
In a study published in the Journal of Nanoparticle Research, the team used a chemical reactor called "continuous flow." Chemicals are continuously put into the reactor and continuous LED lighting is produced. This continuous flow device makes the process of manufacturing LED lighting cheaper, faster, and highly extensible. At the same time, they use microwaves to heat the reagents, solving the problem of how to precisely control the temperature in chemical reactions. This type of microwave device works much like the microwave oven you use at home.
Researchers believe that this method will bring a huge change to the LED lighting field. Because this method can produce quantum dots of consistent size and shape, its flexibility ensures that manufacturers can produce quantum dots with multiple uses. Smaller quantum dots can emit green light, and larger quantum dots can emit orange to red light.
“We may end up producing low-cost, energy-efficient LED lighting that can achieve the desired white light effect,†said Greg Hermann, an associate professor of chemical engineering at the university. The research team believes that their precise manufacturing methods can lead to better color control than other quantum dot manufacturing technologies.
"At the same time, this technology uses non-toxic materials and greatly reduces material waste, which reduces production costs and protects the environment." Herman explained that quantum dots are used in comparison with cadmium, which is commonly used in LED lighting systems. Copper indium diselenide compounds are more environmentally friendly.
The researchers said that quantum dots made by this method can provide another "cheap" choice for many fields such as optics, electronics, and biomedicine. (Reporter Liu Yuanyuan)
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