US researchers improve OLED technology

American researchers have developed a new "spin-polarized" OLED (organic light-emitting diode) technology, and the improved organic light-emitting diode has more advantages than ordinary light-emitting diodes (LED).
OLED refers to the technology that organic materials emit light under the action of electric field. It has the advantages of active illumination, no backlight, bright color and low power consumption. Researchers believe that OLEDs are expected to replace LEDs currently used in many electronic products such as computers, televisions, and lighting equipment after effectively improving OLED luminous efficiency and reducing manufacturing costs.
Researchers at the University of Utah in the United States published a research report in the latest issue of the journal Science, which they developed a new type of OLED using a device called an organic spin valve. This device has a three-layer structure with an organic layer in the middle which is equivalent to a semiconductor and a ferromagnetic metal layer on both sides. The organic layer uses a polymer called "æ°˜-DOO-PPV" which emits orange light at a lower cost and improves luminous efficiency. The entire unit is extremely thin and can be mounted inside the tube.
The researchers say that this technology can only work in low temperature environments and needs to be further refined to meet the requirements of working at room temperature. In addition, it is also desirable to produce an OLED that produces white light.

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