Unlocking Solid-State Upconversion of Deeper NIR Photons

Photon upconversion (UC), the process of converting low energy photons into higher energy photons, holds tremendous potential for various applications including night vision, photovoltaics, and imaging. Near infrared-to-visible upconversion is crucial to overcome the limitations of technologies reliant on silicon. Despite recent progress in triplet-triplet annihilation upconversion, rubrene-based systems by a triplet energy level of 1.12 eV. Here, we make strides towards the upconversion of deeper near infrared photons using tunable PbS quantum dot.