The discovery of new molecules, the future is expected to achieve low-cost OLED

Researchers at the Harvard University have designed more than 1000 kinds of Blu ray molecules, OLED can significantly enhance the effectiveness of OLED TV, smart phones and tablet display.

Harvard University and other researchers using machine learning methods can be used to select blue OLED molecules, the future is expected to achieve low-cost OLED. (source: Harvard University)

OLED screen using light-emitting organic molecules, the current will shine through. Different from the common LCD, OLED screen does not need backlight device, that is to say, OLED display with a thin and flexible features, as simple as a plastic sheet. Each pixel on the OLED display can be turned on and off independently, which greatly improves the screen color contrast and energy consumption efficiency. LCDs is being replaced by OLED in higher order consumer products, but the low stability of OLED and the lack of blue light materials have also led to a reduction in the competitiveness of OLED in large scale displays such as televisions.

Cross professional team of Harvard researchers, the screening process with MIT and Samsung cooperation in the development of large size, with computer control, they call it a "molecular shuttle (Molecular Space Shuttle)", to join the development phase of the chemical process, machine and chemical information acquisition (cheminformatics) to quickly identify new molecules with OLED or better than the industry standard.

Department of chemical biology professor Al nAspuru-Guzik said: "that OLED atoms confined to molecular space a school area, but by the complicated molecular manufacturing device (Molecular Builder), with the most advanced machine learning and research staff expertise, we found a large part of the high efficiency blue OLED raw materials. "

The biggest challenge is the production of cost - effective Blu ray OLED.

Like liquid crystal technology, OLED uses green, red, and blue pixels to create all the colors on the screen. But it has been difficult to produce OLED that emits blue light all the time. In order to improve efficiency, OLED manufacturers to produce organic metal complex molecules, the use of iridium and other precious metals through the transformation of the strengthening of molecules.

This is expensive and still can not achieve a stable OLED Blu ray effect.

Aspuru-Guzik and its team are looking for alternatives to these organic metal and dislocation systems in the hope of achieving complete use of organic molecules.

The research team began to build a database of more than 1 billion 600 million molecules and gradually narrowed the scope. Led by Information Engineering Department, assistant professor RyanAdams John of Harvard University and Harvard Paulson School of engineering and applied science research team developed a new machine learning algorithm to predict which molecules may produce available effect, preference and test of these molecules. This initiative significantly reduces the computational cost of research.

This screening method can be used not only on OLED.

Professor Aspuru-Guzil said: "this study is only a relay point, in order to stimulate more high order organic atoms can be used in liquid batteries, solar cells, organic lasers and more in other fields. The future development of accelerated molecular dynamics is exciting. "

The study was supported by the Samsung advanced technology institute.

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