SEOUL: Ultrathin and lightweight computers that roll up like a piece of paper may be closer to reality, thanks to highly flexible organic light-emitting diodes (OLEDs) developed by Korean scientists. The OLED s have excellent efficiency and make use of graphene as a transparent electrode, researchers said. OLEDs, built upon a plastic substrate, have received greater attention lately for their use in next-generation displays that can be bent or rolled while still operating. Researchers led by Seunghyup Yoo from Korea Advanced Institute of Science (KAIST) and Tae-Woo Lee from Pohang...
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