Bright short-wavelength infrared organic light-emitting devices

Organic LEDs that emit light in the short-wavelength infrared (SWIR) region, which spans 1–2 ?m are attractive for applications biosensors, biomedical imaging and spectroscopy, surveillance. However, fabrication of such devices with high radiance has not yet been achieved owing to an intrinsic limitation imposed by energy-gap law, leads extremely low emission efficiencies. Here, we report acceptor–donor–acceptor-type molecules coplanarity, rigid ?-conjugated backbones, small reorganization energy electron–phonon coupling factor capable simultaneously providing a strongly suppressed non-radiative recombination rate operation stability at current density. We achieve electrically driven SWIR organic irradiance up 3.9 mW cm?2 (corresponding 7% direct sunlight irradiance). These findings should open wide avenue new class sources broad range applications. based on acceptor–donor–acceptor Y11, IDSe-4Cl COTIC-4F shown be highly effective emitters short-wave light.