Please use this identifier to cite or link to this item: http://repo.lib.jfn.ac.lk/ujrr/handle/123456789/1069
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dc.contributor.authorLoheeswaran, S-
dc.contributor.authorThanihaichelvan, M-
dc.contributor.authorRavirajan, P.-
dc.contributor.authorNelson, J-
dc.date.accessioned2017-10-23T08:33:10Z-
dc.date.accessioned2022-07-11T09:44:28Z-
dc.date.available2017-10-23T08:33:10Z-
dc.date.available2022-07-11T09:44:28Z-
dc.date.issued2017-03-
dc.identifier.issn09574522-
dc.identifier.urihttp://repo.lib.jfn.ac.lk/ujrr/handle/123456789/1069-
dc.description.abstractSelf-assembled monolayers (SAMs) of benzoic acid based molecules are used to modify the metal oxide–polymer interface in a hybrid poly-3-hexylthiophene (P3HT)/TiO2 photovoltaic device structure. The effect of SAMs on current density is in accordance with expectation from the driving force for charge separation of metal oxide–polymer interface in a hybrid poly-3-hexylthiophene (P3HT)/TiO2 photovoltaic device. However, the effect of monolayers on open circuit voltage is quite unexpected from the interfacial energetics as all the monolayers improve the open circuit voltage in spite of different sign of the interfacial dipole for different SAMs. This suggests that the monolayers have additional functions. Overall device performance is enhanced by more than a factor of two using a SAM with permanent dipole pointing towards the TiO2 surface or pointing towards polymer when compared to a control device with no interface modifiers. This study concludes that the SAM layer has two functions that are to shift the position of the conduction band of the porous TiO2 relative to the polymer HOMO level so as to influence interfacial charge separation and to act as a barrier layer, insulating back electron transfer from the TiO2 to the polymer. Both effects can benefit the performance of hybrid polymer metal oxide solar cells. © 2016, Springer Science+Business Media New Yorken_US
dc.language.isoen_USen_US
dc.publisherJournal of Materials Science: Materials in Electronicsen_US
dc.subjectSelf assembled monolayersen_US
dc.subjectBack electron transferen_US
dc.subjectBenzoic aciden_US
dc.titleControlling recombination kinetics of hybrid poly-3-hexylthiophene (P3HT)/titanium dioxide solar cells by self-assembled monolayersen_US
dc.typeArticleen_US
Appears in Collections:Physics

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