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Researchers Turn Graphene into Photo Detector Material

By - Source: PhysOrg | B 13 comments

A group of researchers has discovered a way to potentially use graphene for photo detectors in future products such as digital cameras or night vision goggles.

Typically, graphene has rather terrible light-sensing capabilities as it is just 3 percent efficient. However, graphene is apparently good enough to become a photo detector material when it is covered gold electrodes, as well nano-scale crystals, commonly referred to as quantum dots. The scientists experimented with different mixes of the material and finally ended up with a detectivity of 7×10^13 Jones. It is not exactly record breaking for photo detectors overall, as the best detectors today reach more than 1x10^14 Jones at room temperature.

However, the results were still good enough to predict that graphene will also make its way into photo detectors and surface in mass market applications. The research team at the Institut de Ciencies Fotoniques in Barcelona, Spain, said it is now focusing on increasing the size of its detector to "real-world application" sizes.

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  • 16 Hide
    saturnus , May 21, 2012 10:48 AM
    I must admit I've stopped reading articles about what revolutionary thing graphene can be used for.

    Graphene's the bees knees. We get it. Now show us some products based on it.
Other Comments
  • 16 Hide
    saturnus , May 21, 2012 10:48 AM
    I must admit I've stopped reading articles about what revolutionary thing graphene can be used for.

    Graphene's the bees knees. We get it. Now show us some products based on it.
  • 3 Hide
    Haserath , May 21, 2012 11:35 AM
    Perhaps graphene is wonderful in a lab... Trying to mass produce graphene whateveryouwantittobe is a different story.
  • 8 Hide
    memadmax , May 21, 2012 11:46 AM
    Would someone please.... please... please...

    Proofread this crap....
  • 3 Hide
    Cy-Kill , May 21, 2012 12:02 PM
    memadmaxWould someone please.... please... please...Proofread this crap....


    I was just going to post something along these lines.

    A first grader can write better than these so-called "professionals", and I use that word lightly!
  • 2 Hide
    back_by_demand , May 21, 2012 1:07 PM
    Is there anything that you can't use graphene for? Maybe the next generation of non-stick pans, wheels for rollerblades, who knows...
  • 1 Hide
    digiex , May 21, 2012 2:04 PM
    Graphene display panel!
    OMG, one atom thick graphic display!
  • 2 Hide
    warezme , May 21, 2012 2:48 PM
    If graphene still has to sit on a layer of gold electrodes and nano crystals, how is it better then existing sensors? Are they just easier to manufacture and cost less? That is what I'm thinking.
  • 0 Hide
    blazorthon , May 21, 2012 8:29 PM
    warezmeIf graphene still has to sit on a layer of gold electrodes and nano crystals, how is it better then existing sensors? Are they just easier to manufacture and cost less? That is what I'm thinking.


    It might still be thinner than contemporary photo sensors, despite the gold electrodes and the nano crystals increasing it's thickness compared to a single layer of graphene.
  • -1 Hide
    WyomingKnott , May 22, 2012 12:55 PM
    HaserathPerhaps graphene is wonderful in a lab... Trying to mass produce graphene whateveryouwantittobe is a different story.

    Isn't graphene made from pencil lead using adhesive tape as the only tool? So, for a factory, you would just need big pencils and huge rolls of tape. );
  • 1 Hide
    blazorthon , May 22, 2012 2:23 PM
    WyomingKnottIsn't graphene made from pencil lead using adhesive tape as the only tool? So, for a factory, you would just need big pencils and huge rolls of tape. );


    Pencil lead is graphite.
  • 0 Hide
    WyomingKnott , May 22, 2012 8:11 PM
    Quote:
    Pencil lead is graphite.

    I know. There was a wonderful story about isolating graphene from graphite using only Scotch tape. It was part of the research that won the Nobel prize in Physics in 2010. http://www.nobelprize.org/nobel_prizes/physics/laureates/2010/speedread.html
    It appears that you smear some graphite on a piece of Scotch tape. Put another piece of tape over it and separate them. This pulls layers apart.

    Repeat until all the pencil lead stays on one or the other piece of tape. You now have fragments of single-plane arrangements of carbon atoms, or graphene.

    I was joking about scaling that process up to industrial levels, using immense pencils and immense rolls of tape.
  • 0 Hide
    blazorthon , May 22, 2012 8:28 PM
    Quote:
    I know. There was a wonderful story about isolating graphene from graphite using only Scotch tape. It was part of the research that won the Nobel prize in Physics in 2010. http://www.nobelprize.org/nobel_prizes/physics/laureates/2010/speedread.html
    It appears that you smear some graphite on a piece of Scotch tape. Put another piece of tape over it and separate them. This pulls layers apart.

    Repeat until all the pencil lead stays on one or the other piece of tape. You now have fragments of single-plane arrangements of carbon atoms, or graphene.

    I was joking about scaling that process up to industrial levels, using immense pencils and immense rolls of tape.


    Huh, learn something new every day. I don't remember hearing about that.
  • 0 Hide
    tadej petric , March 24, 2013 2:01 PM
    digiexGraphene display panel! OMG, one atom thick graphic display!

    In most cases theres enough room for .5m fatter (lol dont know the word). So yeah even 5cm is over-everything for normal needs