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https://hdl.handle.net/20.500.14279/4417
Τίτλος: | Excitation dynamics of a low bandgap silicon-bridged dithiophene copolymer and its composites with fullerenes | Συγγραφείς: | Choulis, Stelios A. Othonos, Andreas S. Itskos, Grigorios Neophytou, Marios |
metadata.dc.contributor.other: | Νεοφύτου, Μάριος Χούλης, Στέλιος Α. |
Major Field of Science: | Engineering and Technology | Field Category: | Chemical Engineering | Λέξεις-κλειδιά: | Energy gap (Physics);Copolymers;Dynamics;Heterojunctions | Ημερομηνία Έκδοσης: | 2012 | Πηγή: | Applied physics letters, 2012, Volume 100, Issue 15, Pages 1-4 | Περίληψη: | We report on excitation dynamics in pristine and bulk heterojunction films of the low bandgap silicon-bridged dithiophene copolymer poly[(4,4′-bis(2-ethylhexyl)dithieno[3,2-b:2′, 3′-d]silole)-2,6-diyl-alt-(4,7-bis(2-thienyl)-2,1,3-benzothiadiazole)-5,5′-diyl] with methanofullerene derivatives. The combination of ultrafast transient transmission and photoluminescence allows us to probe the relaxation of both exciton and polaron states in a relatively wide spectral and temporal range. Measurements reveal that the majority of excitations undergo ultrashort non-radiative relaxation while a small fraction of the photoexcited species decays slowly within hundreds of ps. In the blend films, significantly longer decays are observed suggesting the presence of long lived holes and/or charged-transfer type of excitons | URI: | https://hdl.handle.net/20.500.14279/4417 | ISSN: | 0003-6951 (print) 1077-3118 (online) |
DOI: | 10.1063/1.3703601 | Rights: | © 2012 American Institute of Physics | Type: | Article | Affiliation: | University of Cyprus Cyprus University of Technology |
Εμφανίζεται στις συλλογές: | Άρθρα/Articles |
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