THE WHATIS.COM WORD-OF-THE-DAY
June 25, 2001
organic thin-film transistor
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TODAY'S WORD: organic thin-film transistor
See our definition with hyperlinks at
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Organic thin-film transistor (OTFT) technology involves the use of
organic semiconducting compounds in electronic components, notably
computer displays. Such displays are bright, the colors are vivid,
they provide fast response times, and they are easy to read in most
ambient lighting environments.
Several factors have motivated engineers to conduct and continue
research in organic semiconductor technology. One of these factors is
cost. Organic displays are relatively cheap, but until recently, they
have proven slow in terms of carrier mobility (the ease with which an
atom shares electrons and holes with other atoms). Slow carrier
mobility translates into sluggish response time, which limits the
ability of a display to render motion such as is common in animated
computer games and, increasingly, on the Web. Researchers at Lucent
Technologies and Pennsylvania State University have, however,
recently developed a process for growing organic crystals with
carrier mobility rivaling that of traditional TFT materials. Further
improvements are expected.
Another factor that motivates research in OTFT technology is
application diversity. Organic substrates allow for displays to be
fabricated on flexible surfaces, rather than on rigid materials as is
necessary in traditional TFT displays. A piece of flexible plastic
might be coated with OTFT material and made into a display that can
be handled like a paper document. Sets of such displays might be
bundled, producing magazines or newspapers whose page contents can be
varied periodically, or even animated. This has far-reaching
ramifications. For example, comic book characters might move around
the pages and speak audible words. More likely, such displays will
find use in portable computers and communications systems.
RELATED TERMS:
thin-film transistor
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semiconductor
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S E L E C T E D L I N K S
[1] Jackson's Electronics Research Group at Pennsylvania State
University has compiled a set of online publications about OTFT.
http://jerg.ee.psu.edu/Publications/index.html
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