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OTTO TODOR-BOER1,2,3, IOAN PETROVAI1,2, RALUCA TARCAN1,2, ANA-MARIA CRACIUN1, LEONTIN DAVID2, SIMION BOGDAN ANGYUS3, SIMION ASTILEAN1,2, IOAN BOTIZ1,*
- Interdisciplinary Research Institute in Bio-Nano-Sciences, Babes-Bolyai University, Treboniu Laurian 42, Cluj-Napoca 400271, Romania
- Faculty of Physics, Babes-Bolyai University, M. Kogalniceanu 1, 400084 Cluj-Napoca, Romania
- INCDO-INOE 2000, Research Institute for Analytical Instrumentation, Donath Street 67, 400293 Cluj-Napoca, Romania
It is nowadays accepted that, when fabricating organic photovoltaics, special attention should be paid to the microstructure of the donor-acceptor active layers from nano- to microscale, as the optimization of molecular conformations in such layers can boost the optoelectronic properties. In this work, we compare neat films of poly[(5,6-difluoro-2,1,3-benzothiadiazol-4,7- diyl)-alt-(3,3’’’-di(2-octyldodecyl)2,2’;5’,2’’;5’’,2’’’ quarter-thiophen-5,5’’’-diyl)] conjugated polymer along with films blended with fullerene acceptors, that were deposited using both spin casting and convective self-assembly techniques. Our results show that convective self-assembly technique induces a more optimized film microstructure comprised of molecular conformations favoring a slightly higher photoluminescence quenching as well as shorter fluorescence lifetimes..
Conjugated polymers, Convective self-assembly, Fluorescence lifetime, Thin films microstructure, Photoluminescence quenching.
Submitted at: May 29, 2019
Accepted at: June 14, 2019
OTTO TODOR-BOER, IOAN PETROVAI, RALUCA TARCAN, ANA-MARIA CRACIUN, LEONTIN DAVID, SIMION BOGDAN ANGYUS, SIMION ASTILEAN, IOAN BOTIZ, Altering the optoelectronic properties of neat and blended conjugated polymer films by controlling the process of film deposition, Journal of Optoelectronics and Advanced Materials Vol. 21, Iss. 5-6, pp. 367-372 (2019)
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