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Is Nokia Into Graphene Based Photo-Sensors?

Nokia’s PureView technology is already at the forefront of imaging in smart phones for quite some time now. However, this has made people ask that what is it that Nokia will bring next to make it even better than before?

How do you think a grapheme based photo sensor would do in the Nokia smart phones?

Well, no one is quite sure about how the technology will be commercialized, but the R&D department of Nokia is already developing a graphene photo detector. Moreover, it has already filed a patent for it as well. So, pretty soon, in the near future, we might be able to see grapheme based photo sensors in Nokia’s smart phones.

How it actually works is that, “The patent describes photo-detector/pixel with graphene photon collecting layer, a number of finger shaped electrodes placed above it to collect electrons-holes generated by passing light photons, a graphene nano-ribbon acting as field effect transistor to amplify the resulting current and transfer it to the connected control electronics. Several light detecting and amplifier layers can be stacked on top of  each other, with color filters in between, so different colors can easily be detected by each pixel in the sensor.”

If anyone is thinking that, why is grapheme for the sensor then the simple answer to this question is that, because of its transparency. Only 2.3% of the passing light is absorbed by this single layer of carbon cells, and the whole process of filtering light is even all across the whole light spectrum. This is the main reason why Nokia believes that this sensor would perform much better than its CMOS sensors in low light conditions.

Then there is question of size. Keep in mind that the graphene bases photo sensors can be easily made much thinner than its traditional counterparts do. Therefore, if you are looking for the next Pure view handset with a 14MP+ camera, then you should look for a lump at its back like the one you see at the back of Nokia 808.

There is a possibility that the graphene performance parts manufacturing will be much cheaper than the CMOS production. This is because the manufacturing process itself should be more simple than the current CMOS production, which is why; it would result in a cheaper price as well.

By now, you would be wondering that if these sensors are so easy to make, so cheaper than the CMOS, and far better in performance, then why is not it still available in the markets yet?

Well, the main reason why any of us have not seen any graphene based photo sensors in cameras these days is because it is still not there at the point where it can be commercially used. Although, as promising as it sounds, but this is the hard truth we all have to face about it. Very few graphene products are getting out from the R&D labs and into the real world for now. This is because of one of the many reasons why graphene is still not there yet.

So now, Nokia has taken up the Challenge to develop graphene based photo sensors for its smart phones of the future. Let’s see how well they do with it.

Source: http://www.unwiredview.com/2012/08/16/after-pureview-whats-next-frontier-for-nokia-imaging-how-about-graphene-based-photo-sensors/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+UnwiredView+%28Unwired+View%29&utm_content=Google+Reader