Abstract
A highly sensitive photodetector with selective response to UV-B photons in air is firstly demonstrated in this work. The quite low noise current of ∼2 × 10−14 A Hz−1/2 allows an accurate detection of UV-B photons of 31.8 nW cm−2 intensity with detectivity of >4 × 1014 Jones. All the figures of merit in our PDs show promising potential in quantitative detection of UV-B for precisely controlling vitamin D generation.
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