Multi‐Resonance 1,4‐BN‐Heteroarene for Filterless Narrowband Photodetector

Abstract As an emerging class of optoelectronic materials, multi‐resonance (MR) 1,4‐BN‐heteroarenes have been extensively employed as narrowband electroluminescence materials, whereas their absorption feature has largely been neglected. Here we construct the first MR‐molecule‐based phototransistor for filterless narrowband photodetectors (NBPDs) by anchoring narrowband absorption MR molecules on a high‐mobility semiconductor indium‐zinc‐oxide (IZO) film. The resulting device exhibits high‐performance photodetection with a small full‐width at half‐maximum (FWHM) of 33 nm, which represents a new record for NBPDs based on intrinsic narrowband absorbing materials. These results demonstrate the great potential of MR materials as a new molecular platform for developing high‐performance NBPDs.