A solvent-free composite polymer/inorganic oxide electrolyte for high efficiency solid-state dye-sensitized solar cells

Katsaros, G; Stergiopoulos, T; Arabatzis, IM; Papadokostaki, KG; Falaras, P

dc.contributor.author	Katsaros, G	en
dc.contributor.author	Stergiopoulos, T	en
dc.contributor.author	Arabatzis, IM	en
dc.contributor.author	Papadokostaki, KG	en
dc.contributor.author	Falaras, P	en
dc.date.accessioned	2014-03-01T01:17:23Z
dc.date.available	2014-03-01T01:17:23Z
dc.date.issued	2002	en
dc.identifier.issn	1010-6030	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14507
dc.subject	AFM	en
dc.subject	All solid-state dye-sensitized solar cell	en
dc.subject	Composite PEO/titania/I-/I3- electrolyte	en
dc.subject	TiO2 films	en
dc.subject.classification	Chemistry, Physical	en
dc.subject.other	electrolyte	en
dc.subject.other	filler	en
dc.subject.other	iodide	en
dc.subject.other	lithium ion	en
dc.subject.other	macrogol	en
dc.subject.other	polymer	en
dc.subject.other	titanium dioxide	en
dc.subject.other	article	en
dc.subject.other	atomic force microscopy	en
dc.subject.other	chemical parameters	en
dc.subject.other	chemical structure	en
dc.subject.other	controlled study	en
dc.subject.other	electric potential	en
dc.subject.other	molecular weight	en
dc.subject.other	photon	en
dc.subject.other	solar radiation	en
dc.subject.other	solid state	en
dc.subject.other	thermography	en
dc.title	A solvent-free composite polymer/inorganic oxide electrolyte for high efficiency solid-state dye-sensitized solar cells	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S1010-6030(02)00027-8	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S1010-6030(02)00027-8	en
heal.language	English	en
heal.publicationDate	2002	en
heal.abstract	A new solvent-free composite polymer electrolyte consisting of high-molecular mass polyethylene oxide (PEO) filled with titanium oxide and containing LiI and I2 was developed. The introduction of the inorganic filler (TiO2 Degussa P25) into the polymer matrix produces dramatic morphological changes to the host polymer structure. Upon addition of the inorganic oxide, the surface roughness increases, with respect to the original polymer and in parallel, the fractal dimension decreases. Both the thermograms and the atomic force microscope (AFM) pictures confirm the amorphicity of the composite electrolyte. The polymer sub-units are held together in a parallel orientation, forming straight long chains of about 500 nm in width, along which TiO2 spherical particles of about 20-25 nm in diameter are distributed. The polymer chains separated by the titania particles are arranged in a three-dimensional, mechanically stable network, that creates free space and voids into which the iodide/triodide anions can easily migrate. All solid-state dye-sensitized solar cells fabricated using this composite electrolyte present high efficiencies (typical maximum incident photon to current efficiency (IPCE) as high as 40% at 520 nm and overall conversion efficiency (eta) of 0.96% (V-oc=0.67 V, J(sc)=2.050 mA/cm(2), FF=39%)) under direct solar irradiation. Further improvement of the photovoltaic performance is expected by optimization of the electrolyte parameters and of the cell assembly. (C) 2002 Elsevier Science 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/S1010-6030(02)00027-8	en
dc.identifier.isi	ISI:000176728800023	en
dc.identifier.volume	149	en
dc.identifier.issue	1-3	en
dc.identifier.spage	191	en
dc.identifier.epage	198	en