Spray-Coated Organic Photodetectors and Image Sensors with Silicon-Like Performance

Solution-processed bulk heterojunction based organic photodiodes are ideal candidates for large-area light sensing. Here, spray-coated large-area organic photodiodes based on a novel polymer (Lisicon PV-D4650) with dark current densities down to 34 pA cm(-2) and a maximum responsivity of approximate to 0.44 A W-1@660 nm under reverse bias conditions of -5 V are reported. These values are comparable to commercially available state-of-the-art solid-state photodetectors. Furthermore, cutoff frequencies of 50 kHz and a linear dynamic range exceeding eight orders of magnitude or >= 160 dB are achieved. The usage of 1,8-diiodooctane as processing additive for spray coating vastly reduces the surface roughness of spray-coated organic photodiodes which facilitates the preparation of large-area light sensors and image sensors.