Lithium salt-nonionic surfactant lyotropic liquid crystalline gel-electrolytes with redox couple for dye sensitized solar cells

dc.authorid0000-0001-8530-5679en_US
dc.authorid0000-0002-1129-3246en_US
dc.authorid0000-0001-8139-925Xen_US
dc.authorid0000-0002-0386-589X
dc.contributor.authorYılmaz, Ezgi
dc.contributor.authorOlutaş, Elif Berna
dc.contributor.authorBarım, Gözde
dc.contributor.authorBandara, Jayasundera
dc.contributor.authorDağ, Ömer
dc.date.accessioned2021-06-23T19:44:16Z
dc.date.available2021-06-23T19:44:16Z
dc.date.issued2016
dc.departmentBAİBÜ, Fen Edebiyat Fakültesi, Kimya Bölümüen_US
dc.description.abstractLithium salt (LiCl, LiBr, LiI, or LiNO3) and a non-ionic surfactant (such as 10-lauryl ether, C12E10) form lyotropic liquid crystalline (LLC) mesophases in the presence of a small amount of water. The mesophases can be prepared as gels by mixing all the ingredients in one pot or in the solution phase that they can be prepared by coating over any substrate where the LLC phase is formed by evaporating excess solvent. The second method is easier and produces the same mesophase as the first method. A typical composition of the LLC phases consists of 2-3 water per salt species depending on the counter anion. The LiI-C12E10 mesophases can also be prepared by adding I-2 to the media to introduce an I-/I-3(-) redox couple that may be used as a gel-electrolyte in a dye-sensitized solar cell. Even though the mesophases contain a large amount of water in the media, this does not affect the cell performance. The water molecules in the mesophase are in the hydration sphere of the ions and do not act like bulk water, which is harmful to the anode of the dye-sensitized solar cells (DSSC). There are two major drawbacks of the salt-surfactant LLC mesophases in the DSSCs; one is the diffusion of the gels into the pores of the anode electrode and the other is the low ionic conductivity. The first issue was partially overcome by introducing the gel content as a solution and the gelation was carried in/over the pores of the dye modified titania films. To increase the ionic conductivity of the gels, other salts (such as LiCl, LiBr, and LiNO3) with better ionic conductivity were added to the media, however, those gels behave less effectively than pure LiI/I-2 systems. Overall, the DSSCs constructed using the LLC electrolyte display high short circuit current (I-sc of around 10 mA), high open circuit voltage (V-oc of 0.81 V) and good fill factor (0.69) and good efficiency (3.3%). There is still room for improvement in addressing the above issues in order to enhance the cell efficiency by developing new methods of introducing the gel-electrolytes into the mesopores of the anode electrode.en_US
dc.identifier.doi10.1039/c6ra19979h
dc.identifier.endpage97437en_US
dc.identifier.issn2046-2069
dc.identifier.issue99en_US
dc.identifier.scopus2-s2.0-84991447028en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage97430en_US
dc.identifier.urihttps://doi.org/10.1039/c6ra19979h
dc.identifier.urihttps://hdl.handle.net/20.500.12491/8952
dc.identifier.volume6en_US
dc.identifier.wosWOS:000386242500120en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorOlutaş, Elif Berna
dc.language.isoenen_US
dc.publisherRoyal Soc Chemistryen_US
dc.relation.ispartofRsc Advancesen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectLithium Salt (LiCl, LiBr, LiI, or LiNO3)en_US
dc.subjectLyotropic Liquid Crystalline (LLC)
dc.subjectRedox Couple
dc.subjectDye Sensitized Solar Cells
dc.titleLithium salt-nonionic surfactant lyotropic liquid crystalline gel-electrolytes with redox couple for dye sensitized solar cellsen_US
dc.typeArticleen_US

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