Researchers are working to bring cheaper, more "green" LED lighting market

Hi everyone！Today we are talking about the "green" LED lighting market.

It's not easy being green. For home lighting applications, organic light emitting diodes (OLED) hold the promise of being both versatile environment. Although not as regular as efficient light-emitting diodes (LEDs), which offer a wider range of equipment options and are more efficient than traditional energy lights. OLEDs can also be flexibly applied to the surfaces, which can lead to the lights or television screens that can be rolled up and stowed in a pocket. One promising line of research involves the combination of OLEDs with inorganic quantum dots tiny semiconductor variable message sign crystals that emit different colors of light depending on their size. These "hybrid" OLED, also called LEDs quantum dot (QD-LEDs), increase the efficiency of light emitting devices and also increase the range of colors that can be produced. Commercially But this promising green manufacturing technology remains difficult and costly. To make OLEDs cheaper and easier, researchers at the University of Louisville in Kentucky are developing the development of new materials and production methods using modified quantum dots and inkjet printing. Delaina According to Amos, a professor at the University of Louisville and the principal investigator of the team's efforts, the cost of materials and manufacturing processes has been a major obstacle to the use of OLED lighting devices daily. Economically implementing their quantum dots hybrid devices, researchers use Louisville inkjet printing, popular in recent years as a way to spray the quantum dots and the OLED materials on a surface with high accuracy. Unlike other groups that experience But with this method, Amos team has focused on the technical adaptation of inkjet printing for use in a commercial environment in which minimizes the cost of mass production and results in products off-the-shelf affordable. "We are currently working on a small scale, typically 1 inch by 1 inch for OLED," said Amos. "The process can be scaled from here, probably 6 inches by 6 inches and larger." "There is a reason we do not see OLED lights for sale in the hardware store," said Amos, but adds that find use in small devices such as LED Display cameras, photo frames, and mobile phone screens. To take your QD-LEDs closer to becoming market-ready devices such as home lighting, Amos and his team have been synthesizing new, less expensive and more environmentally quantum dots. The equipment has been modified also interfaces between the quantum dots and other layers of the OLED display to improve the efficiency with which electrons are transferred, ie enabling them to produce more efficient light in the visible spectrum. In addition to its greater efficiency, greater variety of colors, and abitur to be applied to soft surfaces, Amos' QD-LEDs also use low-toxic materials, making them potentially better for the environment. "Ultimately we want to have low cost, low toxicity, and the ability to make soft devices," says Amos. The team recently demonstrated small devices work, and Amos adds that he hopes to have larger devices in the coming months.