phys/UV light improves smartphone cameras/2016-10-24





UV light improves smartphone cameras


UV light improves smartphone cameras
Photodetectors, which are used in a wide range of systems and devices from smartphones to space stations, are typically only sensitive to light within a certain narrow bandwidth.This presents numerous challenges to product developers.Together with their colleagues from China and Saudi Arabia, scientists at MIPT have found a way to address this.


UV light can improve smartphone cameras


UV light can improve smartphone cameras
Treating photodetectors -- used in systems and devices from smartphones to space stations -- with ultraviolet light can improve the efficiency of cameras, researchers say.Together with colleagues from China and Saudi Arabia, scientists from Moscow Institute of Physics and Technology (MIPT) said that treating an ordinary low band-width photodetector with UV light can turn it into a high-bandwidth device.SEE ALSO: Should you buy the latest Reliance Lyf F1 smartphone?


UV light can improve the efficiency of smartphone cameras


UV light can improve the efficiency of smartphone cameras
MOSCOW: Treating photodetectors -- used in systems and devices from smartphones to space stations -- with ultraviolet light can improve the efficiency of cameras, researchers say.Together with colleagues from China and Saudi Arabia, scientists from Moscow Institute of Physics and Technology (MIPT) said that treating an ordinary low band-width photodetector with UV light can turn it into a high-bandwidth device."It's hard to find the right materials because the substances that permit ultraviolet light tend to be nontransparent to infrared radiation and vice versa.We found a way to 'broaden' the spectral response of photodetectors," noted Vadim Agafonov, head of the Molecular Electronics Center at MIPT and a co-author of the paper.The researchers conducted an experiment whereby a polymer-based photodetector incorporating zinc oxide (ZnO) nanoparticles was exposed to UV light for 30 seconds.As a result, they achieved a high-performance photodetector with a much broader spectral response and a maximum external quantum efficiency (EQE) of 140,000 per cent, as compared to the 30 per cent measured before UV treatment.


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