Detecting 100 fW cm<sup>-2</sup> Light with Trapped Electron Gated Organic Phototransistors.

Zhang, Yang; Yuan, Yongbo; Huang, Jinsong · Adv Mater · 2017

basic_science · Level V

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Abstract

Ultraweak light detection with solid-state and cooling-free photodetectors is important for both fundamental research and practical applications. A general phototransistor architecture for detecting ultraviolet-visible light down to 100 fW cm<sup>-2</sup> at room temperature is demonstrated. The exceptional sensitivity stems from an amplification process triggered by incident light. A responsivity of ≈10<sup>7</sup> A W<sup>-1</sup> is achieved.