dc.contributor.author | Cheetham, Nathan J. | en |
dc.contributor.author | Ortiz, Manuel | en |
dc.contributor.author | Perevedentsev, Aleksandr | en |
dc.contributor.author | Dion-Bertrand, Laura-Isabelle | en |
dc.contributor.author | Greetham, Gregory M. | en |
dc.contributor.author | Sazanovich, Igor V. | en |
dc.contributor.author | Towrie, Michael | en |
dc.contributor.author | Parker, Anthony W. | en |
dc.contributor.author | Nelson, Jenny | en |
dc.contributor.author | Silva, Carlos | en |
dc.contributor.author | Bradley, Donal D. C. | en |
dc.contributor.author | Hayes, Sophia C. | en |
dc.contributor.author | Stavrinou, Paul N. | en |
dc.creator | Cheetham, Nathan J. | en |
dc.creator | Ortiz, Manuel | en |
dc.creator | Perevedentsev, Aleksandr | en |
dc.creator | Dion-Bertrand, Laura-Isabelle | en |
dc.creator | Greetham, Gregory M. | en |
dc.creator | Sazanovich, Igor V. | en |
dc.creator | Towrie, Michael | en |
dc.creator | Parker, Anthony W. | en |
dc.creator | Nelson, Jenny | en |
dc.creator | Silva, Carlos | en |
dc.creator | Bradley, Donal D. C. | en |
dc.creator | Hayes, Sophia C. | en |
dc.creator | Stavrinou, Paul N. | en |
dc.date.accessioned | 2021-01-25T09:45:00Z | |
dc.date.available | 2021-01-25T09:45:00Z | |
dc.date.issued | 2019 | |
dc.identifier.issn | 0897-4756 | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/63134 | |
dc.description.abstract | Understanding the structure–property relationships that govern exciton dissociation into polarons in conjugated polymers is key in developing materials for optoelectronic applications such as light-emitting diodes and solar cells. Here, the polymer poly(9,9-dioctylfluorene) (PFO), which can form a minority population of chain segments in a distinct, lower-energy “β-phase” conformation, is studied to examine the influence of conformation and microstructure on polaron generation in neat thin films. Through use of ultrafast transient absorption spectroscopy to probe PFO thin films with glassy-phase and β-phase microstructures and selectively exciting each phase independently, the dynamics of exciton dissociation are resolved. Ultrafast polaron generation is consistently found to be significantly higher and long-lived in thin films containing β-phase chain segments, with an average polaron yield that increases by over a factor of three to 4.9% vs 1.4% in glassy-phase films. The higher polaron yield, attributed to an increased exciton dissociation yield at the interface between conformational phases, is most likely due to a combination of the significant energetic differences between glassy-phase and β-phase segments and disparities in electronic delocalization and charge carrier mobilities between phases. | en |
dc.source | Chemistry of Materials | en |
dc.source.uri | https://doi.org/10.1021/acs.chemmater.9b01256 | |
dc.title | The Importance of Microstructure in Determining Polaron Generation Yield in Poly(9,9-dioctylfluorene) | en |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | 10.1021/acs.chemmater.9b01256 | |
dc.description.volume | 31 | |
dc.description.issue | 17 | |
dc.description.startingpage | 6787 | |
dc.description.endingpage | 6797 | |
dc.author.faculty | 002 Σχολή Θετικών και Εφαρμοσμένων Επιστημών / Faculty of Pure and Applied Sciences | |
dc.author.department | Τμήμα Χημείας / Department of Chemistry | |
dc.type.uhtype | Article | en |
dc.source.abbreviation | Chem. Mater. | en |
dc.contributor.orcid | Hayes, Sophia C. [0000-0002-2809-6193] | |
dc.contributor.orcid | Stavrinou, Paul N. [0000-0001-6075-2587] | |
dc.gnosis.orcid | 0000-0002-2809-6193 | |
dc.gnosis.orcid | 0000-0001-6075-2587 | |