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Quasi solid state polymer electrolyte with binary iodide salts for photo-electrochemical solar cells

T.M.W.J. Bandara (Institutionen för teknisk fysik, Fasta tillståndets fysik) ; Wjmjsr Jayasundara ; MAKL Dissanayake ; Hdns Fernando ; Maurizio Furlani (Institutionen för teknisk fysik, Fasta tillståndets fysik) ; Ingvar Albinsson ; Bengt-Erik Mellander (Institutionen för teknisk fysik, Nukleär teknik)
International Journal of Hydrogen Energy (0360-3199). Vol. 39 (2014), 6, p. 2997-3004.
[Artikel, refereegranskad vetenskaplig]

Quasi-solid-state polymer electrolytes can be used in dye sensitized solar cells (DSSCs) in order to overcome various problems associated with liquid electrolytes. Prior to fabricating commercially viable solar cells, the efficiency of quasi solid state DSSCs needs to be improved. Using electrolytes with a binary iodide mixture is a novel technique used to obtain such efficiency enhancement. In this work we report both conductivity and solar cell performance enhancements due to incorporation of a mixture containing LiI and tetrahexylammonium iodide in a quasi-solid-state electrolyte. The conductivity of the electrolyte increases with added amounts of Lit and thus the highest conductivity, 3.15 x 10(-3) S cm(-2) at 25 degrees C, is obtained for the electrolyte 100 wt% LiI. The predominantly ionic behavior of the electrolytes was established from dc polarization measurements. The iodide ion conductivity, measured using iodine pellet electrodes decreased somewhat with increasing amount of LiI even though the overall conductivity increased. However, the highest efficiency was obtained for the DSSC containing a polymer electrolyte with Hex(4)N(+)I:LiI = 1:2 mass ratio. This cell had the largest short circuit current density of about 13 mA cm(-2) and more than 4% overall energy conversion efficiency. The results thus show that electrolytes with Hex(4)N(+)I/LiI mixed iodide system show better DSSC performance than single iodide systems. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

Nyckelord: Dye sensitized solar cells, Polymer electrolyte, Cation effect, Quasi-solid electrolytes, Ionic, IONIC-CONDUCTIVITY, EFFICIENCY, PERFORMANCE, CONVERSION, LAYER

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Denna post skapades 2014-04-02. Senast ändrad 2015-04-22.
CPL Pubid: 196115


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Institutioner (Chalmers)

Institutionen för teknisk fysik, Fasta tillståndets fysik (2005-2015)
Institutionen för fysik (GU) (GU)
Institutionen för teknisk fysik, Nukleär teknik (2006-2015)


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