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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/7835
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dc.contributor.authorShah, Asmita-
dc.contributor.authorSingh, Dharmendra Pratap-
dc.contributor.authorDuponchel, Benoit-
dc.contributor.authorKrasisnski, Freddy-
dc.contributor.authorDaoudi, Abdelylah-
dc.contributor.authorKumar, Sandeep-
dc.contributor.authorDouali, Redouane-
dc.date.accessioned2021-10-20T05:43:37Z-
dc.date.available2021-10-20T05:43:37Z-
dc.date.issued2021-09-
dc.identifier.citationJournal of Molecular Liquids, 2021, Vol. 342, Article Number - 117353en_US
dc.identifier.issn0167-7322-
dc.identifier.urihttp://hdl.handle.net/2289/7835-
dc.descriptionRestricted Accessen_US
dc.description.abstractWe investigate the charge transport in triphenylene core based homologous series of discotic mesogens (HATn) by the time-of-flight method. HAT5, HAT6 and HAT8 exhibit Colh phase whereas HAT4 shows Colhp phase. For the investigated homologous series, we have observed a single transit in the transient photocurrent curves corresponding to positive charge carriers having the mobility in order of 10-2 to 10-4 cm2/vs. The hole mobility decreases with increasing the number of carbon atoms (n) in the alkyl chain attached to the triphenylene core, which follows the empirical exponential relationship: μ≈a.exp(-b/n). Furthermore, the dielectric measurement has been done on these compounds to bring a correlation between the molecular ordering by varying the alkyl chain of the HATn compounds. In the light of structure-property correlation, we have noticed that the hole mobility and permittivity vary according to the length of alkyl chain attached to the triphenylene core. The molecular ordering is also discussed via phase behaviour of compounds and confirmed by polarized optical textures. The change in entropy also decreases with increasing alkyl chain length of the HATn compounds rendering an agreement with that of the mobility and dielectric measurements. The HATn compounds show their potential applications in opto-electronics and could serve as organic semiconductors; however, the poor conductivity remains as a futuristic challenge.en_US
dc.language.isoenen_US
dc.publisherElsevier B.V.en_US
dc.relation.urihttps://doi.org/10.1016/j.molliq.2021.117353en_US
dc.rights2021 Elsevieren_US
dc.subjectdiscotic liquid crystalen_US
dc.subjectcharge transporten_US
dc.subjecthole mobilityen_US
dc.subjectdielectric propertyen_US
dc.titleMolecular ordering dependent charge transport in π-stacked triphenylene based discotic liquid crystals and its correlation with dielectric propertiesen_US
dc.typeArticleen_US
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