Photon Up-Conversion In the Research Article (DOI: 10.1002/admi.202500897), Maciej Klein, Evan G. Moore, Ajay K. Pandey, and co-workers describe a novel strategy for harnessing near-infrared photons to advance solid-state photon interconversion in molecular heterojunctions. The NIR-absorbing molecular stack enables efficient triplet generation via charge-transfer state formation, amplifying triplet population density and yielding high photon up-conversion quantum efficiencies under incoherent, low-intensity illumination. The underlying excitonic cascade makes it highly attractive for quantum sensing and photodetector technologies.
Klein et al. (2026) studied this question.