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

Abstract 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 ≈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.