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Impact of Electrolytes Based on Different Solvents on the Long Term Stability of Dye Sensitized Solar Cells

DSpace at IIT Bombay

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Title Impact of Electrolytes Based on Different Solvents on the Long Term Stability of Dye Sensitized Solar Cells
 
Creator MOHANTY, SP
BHARGAVA, P
 
Subject PHOTOVOLTAIC PERFORMANCE
DEGRADATION MECHANISMS
LIQUID ELECTROLYTES
EFFICIENCY
NANOPARTICLES
Aging
N-methyl-2-pyrrolidone
Sealant
Zinc leaching
 
Description The present article demonstrates the effect of different solvents used in the preparation of electrolyte on the photoelectrochemical characteristics of dye sensitized solar cells (DSSCs) aged under heat (60 degrees C) and illumination for 60 days. The study has been carried out with four different solvents: 3-methoxypropionitrile (MPN), N-methyl-2-pyrrolidone (NMP), propylene carbonate (PC) and gamma-butyrolactone (GBL) which differ in terms of donor number, viscosity and dielectric constant. For DSSCs with electrolytes based on MPN, PC and GBL as solvents, performance decreases with time. In contrast, for DSSC with NMP as solvent in electrolyte, increase in JSC and hence, efficiency up to 15 days has been observed followed by a gradual decrease, but remaining above its initial value after 60 days. However, VOC of such cell decreases with time. There are two possible causes for the above observations. Desorption of NMP molecules from titania surface occurred with aging. Secondly, zinc ions leached into the electrolyte following reaction of NMP with sealant were adsorbed on titania surface. The causes behind aging behavior of cells prepared with different solvent based electrolytes have been analyzed using electrochemical impedance analysis of DSSCs, energy-dispersive X-ray spectroscopy (EDS) of photoanodes and inductively coupled plasma-atomic emission spectroscopy (ICP-AES) of electrolyte containing sealant sample which had also undergone aging under similar condition. (C) 2015 Elsevier Ltd. All rights reserved.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2016-01-14T13:39:00Z
2016-01-14T13:39:00Z
2015
 
Type Article
 
Identifier ELECTROCHIMICA ACTA, 168,111-115
0013-4686
1873-3859
http://dx.doi.org/10.1016/j.electacta.2015.03.202
http://dspace.library.iitb.ac.in/jspui/handle/100/17636
 
Language en