Thin, large-area device converts infrared light into images

EurekAlert  May 5, 2021
An international team of researchers (USA – UC San Diego, University of Southern Mississippi, South Korea) has developed an organic upconversion imager that is efficient in both optical and electronic readouts, extending the capability of human and machine vision to 1400 nm. The imager structure incorporates interfacial layers to suppress non‐radiative recombination and provide enhanced optical upconversion efficiency and electronic detectivity. The photo response is comparable to state‐of‐the‐art organic infrared photodiodes exhibiting a high external quantum efficiency of ≤35% at a low bias of ≤3 V and 3 dB bandwidth of 10 kHz. With a large active area of 2 cm2 the imager they have demonstrated imaging through smog, recording of blood vessel location and blood flow pulses and inspecting objects such as silicon chips…read more. TECHNICAL ARTICLE