HTTP:: Graphene to Be Used for Next Gen Photodetectors
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Since it was first discovered in the United Kingdom, back in 2004, the carbon compound graphene has been used for a wide variety of applications, from creating amazingly fast transistors to producing very dense memory chips. Now, with research in these areas well underway, physicists are beginning to explore its uses in optoelectronics, especially in the field of detecting photons. Researchers at IBM believe that graphene has the natural ability of making an excellent photodetector, and have started work on exploring this possibility, Technology Review reports. Usually, III-V semiconductors are used for producing this type of detectors. They include several chemicals, most commonly gallium and phosphorus, and can be a pain to manufacture. Their operating principle is fairly basic â€" light hitting them produces an electron-hole in the materials, and these electrons are then channeled out of the material, and transformed into electrical impulses. According to the IBM team,!
the one-atom-thick structure of graphene can transport these signals tens of times faster than III-V semiconductors, which would result in faster and more efficient photodetectors. Additionally, graphene is also able to absorb infrared wavelengths, whereas regular detectors can only make out a narrow range from the near-infrared...
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http://news.softpedia.com/news/Graphene-to-Be-Used-for-Next-Gen-Photodetectors-124146.shtml
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