Dynamics of photogenerated polarons and polaron pairs in P3HT thin films

0473851 - ÚMCH 2018 RIV NL eng J - Článek v odborném periodiku
Menšík, Miroslav - Pfleger, Jiří - Toman, Petr
Dynamics of photogenerated polarons and polaron pairs in P3HT thin films.
Chemical Physics Letters. Roč. 677, 1 June (2017), s. 87-91. ISSN 0009-2614. E-ISSN 1873-4448
Grant CEP: GA MŠMT(CZ) LO1507
Institucionální podpora: RVO:61389013
Klíčová slova: poly(3-hexyl thiophene) * transient absorption spectroscopy * polaron and polaron pairs
Obor OECD: Polymer science
Impakt faktor: 1.686, rok: 2017

On the basis of the analysis of the experimental data of the transient absorption spectroscopy of thin films of regioregular poly(3-hexyl thiophene) we suggest a mechanism of the polaron pairs decay based on the coherent up and down conversion cycling between hot polaron pairs and free polarons. Compared to previously adopted models, based on single molecular processes or bimolecular collisions, the suggested model reproduced well both the polaron pairs and polaron population kinetics at short time after photoexcitation. For longer times, when the polaron pairs are already thermalized, they decay via 1-D diffusion limited bi-molecular collision processes.
Trvalý link: http://hdl.handle.net/11104/0271211