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Organic Semiconductors Make Flexible Photovoltaics, LEDs

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ITHACA, N.Y., Sept. 12, 2006 -- A new type of organic semiconductor device which shows electroluminescence and acts as a photovoltaic cell could be used to create displays on cloth or paper, possibly leading to the making of T-shirts that light up or a beach umbrella that collects solar energy to power a portable TV. The device, created by researchers at Cornell University, is the first to use an "ionic junction," which the scientists said could lead to improved performance. Since organic semiconductors can be made in thin, flexible sheets, they could create displays on cloth or paper. "Flexible means low-cost...Read full article

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    Published: September 2006
    Glossary
    diode
    A two-electrode device with an anode and a cathode that passes current in only one direction. It may be designed as an electron tube or as a semiconductor device.
    electron
    A charged elementary particle of an atom; the term is most commonly used in reference to the negatively charged particle called a negatron. Its mass at rest is me = 9.109558 x 10-31 kg, its charge is 1.6021917 x 10-19 C, and its spin quantum number is 1/2. Its positive counterpart is called a positron, and possesses the same characteristics, except for the reversal of the charge.
    transistor
    An electronic device consisting of a semiconductor material, generally germanium or silicon, and used for rectification, amplification and switching. Its mode of operation utilizes transmission across the junction of the donor electrons and holes.
    Basic ScienceConsumerCornell Universitydefensediodeelectroluminesenceelectronenergyfilmflexibleionic junctionLight Sourcesn-typeNews & Featuresorganic semiconductorp-typephotovoltaicssolartransistor

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