The influence of the metal cation and the filler on the performance of dye-sensitized solar cells using polymer-gel redox electrolytes

Chatzivasiloglou, E; Stergiopoulos, T; Kontos, AG; Alexis, N; Prodromidis, M; Falaras, P

dc.contributor.author	Chatzivasiloglou, E	en
dc.contributor.author	Stergiopoulos, T	en
dc.contributor.author	Kontos, AG	en
dc.contributor.author	Alexis, N	en
dc.contributor.author	Prodromidis, M	en
dc.contributor.author	Falaras, P	en
dc.date.accessioned	2014-03-01T01:27:25Z
dc.date.available	2014-03-01T01:27:25Z
dc.date.issued	2007	en
dc.identifier.issn	1010-6030	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18444
dc.subject	Composite PEO-titania-redox electrolyte	en
dc.subject	Diffusion	en
dc.subject	Dye-sensitized solar cells	en
dc.subject	Metal iodide salts	en
dc.subject	Propylene carbonate plasticizer	en
dc.subject.classification	Chemistry, Physical	en
dc.subject.other	SOLID-STATE	en
dc.subject.other	PHOTOELECTROCHEMICAL CELLS	en
dc.subject.other	LITHIUM BATTERIES	en
dc.subject.other	TIO2 FILMS	en
dc.subject.other	MORPHOLOGY	en
dc.subject.other	EFFICIENCY	en
dc.subject.other	COMPOSITE	en
dc.subject.other	DIFFUSION	en
dc.subject.other	TRANSPORT	en
dc.subject.other	ELECTRODES	en
dc.title	The influence of the metal cation and the filler on the performance of dye-sensitized solar cells using polymer-gel redox electrolytes	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.jphotochem.2007.05.003	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.jphotochem.2007.05.003	en
heal.language	English	en
heal.publicationDate	2007	en
heal.abstract	New composite PEO-based polymer-gel electrolytes were developed, using propylene carbonate (PC) plasticizer and iodide/triiodide (I-/I-3(-)) redox couple. The iodide anion was introduced in the form of the corresponding metal salts: CsI, RbI and LiI and the influence of the metal cation was examined. The non-volatile and high polar character of the PC plasticizer results to excellent ionic conductivity values of the electrolyte samples (up to 1.6 mS cm(-1)), as well as remarkable stability over time. Linear sweep voltametry measurements revealed noticeable triiodide diffusion coefficient values (in the order of 2 x 10(-6) cm s(-1)). The thermograms confirm the amorphicity of the electrolytes (crystallinity values below 20%). All the experimental results showed that the introduction of inorganic titania filler (Degussa P25) into the polymer matrix reduces even more the crystallinity of the samples and enhances the mobility of the redox couple. Nanocrystalline photoelectrochemical solar cells were fabricated with the newly developed composite electrolytes and were tested with I-V measurements. All cells presented high efficiency values for this type of composite electrolytes, with the best performance attained in the case of the PEO-TiO2-PC(CSI/I-3(-)) electrolyte, with overall energy conversion efficiency (eta) of 2.87% under standard AM1.5 simulated solar irradiation. Our results clearly support the redox couple mobility dependence on the cation nature. (C) 2007 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE SA	en
heal.journalName	Journal of Photochemistry and Photobiology A: Chemistry	en
dc.identifier.doi	10.1016/j.jphotochem.2007.05.003	en
dc.identifier.isi	ISI:000251186400008	en
dc.identifier.volume	192	en
dc.identifier.issue	1	en
dc.identifier.spage	49	en
dc.identifier.epage	55	en