The most relevant single sentence from the paper seems to be: > Special emphasis is put on the UV range (λ=200-350nm) where we show that extremely high respons

The most relevant single sentence from the paper seems to be: > Special emphasis is put on the UV range (λ=200-350nm) where we show that extremely high response, more than 130%, can be achieved at zero bias. The material they constructed turns out to react well to UV light, so well that it proves their technique is worth further investment.