Reverse dark current in organic photodetectors and the major role of traps as source of noise.

ABSTRACT: Organic photodetectors have promising applications in low-cost imaging, health monitoring and near-infrared sensing. Recent research on organic photodetectors based on donor-acceptor systems has resulted in narrow-band, flexible and biocompatible devices, of which the best reach external photovoltaic quantum efficiencies approaching 100%. However, the high noise spectral density of these devices limits their specific detectivity to around 10¹³ Jones in the visible and several orders of magnitude lower in the near-infrared, severely reducing performance. Here, we show that the shot noise, proportional to the dark current, dominates the noise spectral density, demanding a comprehensive understanding of the dark current. We demonstrate that, in addition to the intrinsic saturation

SUBMITTER: Kublitski J 

PROVIDER: S-EPMC7822930 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature