A nascent challenge for organic semiconductors is their application in infrared optoelectronics. However, infrared absorption is linked to the formation of strong electronic correlations and open-shell character. We use ultrafast spectroscopy to identify and explain the unusual photophysics of these materials.
Organic shortwave infrared detectors based on donor-acceptor polymers are advancing rapidly and capable of detectivity exceeding 1011 Jones. This talk will discuss the main bottlenecks associated with charge recombination and trapping. Several integrated system demonstrations will show the various potential applications including spectroscopic identification and image reconstruction.
We discuss new macromolecular design paradigms and strategies to control orbital topology such that very low bandgap donor-acceptor conjugated polymers (DA CPs) can be synthesized in order to yield open-shell species in singlet (S = 0) and triplet (S = 1) spin states.