%0 Journal Article %1 PhysRevApplied.20.064029 %A Stankevych, Andrei %A Saxena, Rishabh %A Grüne, Jeannine %A Lulei, Sebastian %A Sperlich, Andreas %A Athanasopoulos, Stavros %A Vakhnin, Alexander %A Sahay, Prakhar %A Brütting, Wolfgang %A Dyakonov, Vladimir %A Bässler, Heinz %A Köhler, Anna %A Kadashchuk, Andrey %D 2023 %I American Physical Society %J Phys. Rev. Appl. %K c %N 6 %P 064029 %R 10.1103/PhysRevApplied.20.064029 %T Charge-carrier photogeneration in single-component organic carbazole-based semiconductors via low excitation power triplet-triplet annihilation %U https://link.aps.org/doi/10.1103/PhysRevApplied.20.064029 %V 20 %X This work demonstrates that triplet-triplet annihilation (TTA) is the predominant mechanism of intrinsic photogeneration of charge-carrier pairs via autoionization, in a single-component disordered organic system with no heavy atoms. The findings challenge established beliefs by revealing efficient carrier generation via TTA upon excitation near the absorption edge. Photocurrent measurements, optical spectroscopy, and spin-sensitive techniques support this model of bimolecular charge generation. Such mechanisms in organic semiconductors are relevant not just for OLEDs, but also for long-persistent luminescence, photovoltaics, and potentially for photocatalytic water splitting.

@article{PhysRevApplied.20.064029, abstract = {This work demonstrates that triplet-triplet annihilation (TTA) is the predominant mechanism of intrinsic photogeneration of charge-carrier pairs via autoionization, in a single-component disordered organic system with no heavy atoms. The findings challenge established beliefs by revealing efficient carrier generation via TTA upon excitation near the absorption edge. Photocurrent measurements, optical spectroscopy, and spin-sensitive techniques support this model of bimolecular charge generation. Such mechanisms in organic semiconductors are relevant not just for OLEDs, but also for long-persistent luminescence, photovoltaics, and potentially for photocatalytic water splitting.}, added-at = {2024-07-18T11:56:35.000+0200}, author = {Stankevych, Andrei and Saxena, Rishabh and Gr\"une, Jeannine and Lulei, Sebastian and Sperlich, Andreas and Athanasopoulos, Stavros and Vakhnin, Alexander and Sahay, Prakhar and Br\"utting, Wolfgang and Dyakonov, Vladimir and B\"assler, Heinz and K\"ohler, Anna and Kadashchuk, Andrey}, biburl = {https://www.bibsonomy.org/bibtex/2f79488963533b2169f03ad22b30d647a/ctqmat}, day = 15, doi = {10.1103/PhysRevApplied.20.064029}, interhash = {9878f403c267f8880ff76125577619b5}, intrahash = {f79488963533b2169f03ad22b30d647a}, journal = {Phys. Rev. Appl.}, keywords = {c}, month = {12}, number = 6, numpages = {16}, pages = 064029, publisher = {American Physical Society}, timestamp = {2024-07-18T11:56:35.000+0200}, title = {Charge-carrier photogeneration in single-component organic carbazole-based semiconductors via low excitation power triplet-triplet annihilation}, url = {https://link.aps.org/doi/10.1103/PhysRevApplied.20.064029}, volume = 20, year = 2023 }