"Near-infrared absorbing cyanine dyes for all-organic optical upconversion devices"

Autores: Rian Aderne, Karen Strassel, Sandra Jenatsch, Matthias Diethelm, Roland Hany, Frank Nüesch, R. S. Carvalho, Cristiano Legnani, Marco Cremona.

Instituições: PUC-Rio.

Autor apresentador: Rian Aderne.

Resumo: The development of near-infrared (NIR) photodetection technologies is driven by emerging applications such as medical imaging or optical sensors for electronic displays and machine vision. An all-organic upconverter (OUD) is a device that converts incident NIR light directly into visible light and consists of a monolithic stack of a NIR organic photodetector (OPD) and a visible organic light-emitting diode (OLED). We present OUDs that consist of NIR heptamethine cyanine dyes/C60 fullerene OPDs and a fluorescent tris(8-hydroxyquinolinato)aluminium (Alq3) OLED. The device metrics of performance are a high external quantum efficiency (EQE) of 43% of the OPD part and an OUD luminance turn-on at low bias voltages of 2 V. These OUDs upconvert NIR light at 830 nm to green light with a photon-to-photon conversion efficiency of 0.61%, close to the expected maximum.

Link do vídeo: https://www.youtube.com/watch?v=Dz119vTwfXc

Link da sala do Meet: https://meet.google.com/nbf-nzbe-tuo