NDLI: Characterization of interfacial charge transport and recombination by impedance spectroscopy on SiO coated TiO based dye sensitized solar cells

Content Provider	IEEE Xplore Digital Library
Author	Shanmugam, M. Baroughi, M.F.
Copyright Year	2011
Description	Author affiliation: Department of Electrical Engineering and Computer Science South Dakota State University, Brookings, SD-57007, USA (Shanmugam, M.; Baroughi, M.F.)
Abstract	Performance of dye sensitized solar cells (DSSCs) was improved 80%, by treating the mesoporous titanium dioxide (TiO) surface using atomic layer deposited (ALD) ultra thin silicon dioxide (SiO), compared to a DSSC with untreated mesoporous TiO photoelectrode. Effect of SiO treatment on charge transport, recombination and lifetime of electrons in the TiO were investigated by electrochemical impedance spectroscopy (EIS). X-ray photoelectron spectroscopy confirmed the ultra thin growth of SiO on the surface of mesoporous TiO. Dark current-voltage (I-V) characteristics of the DSSCs with SiO surface treatment showed that the TiO/electrolyte interface quality was better than that of DSSC with untreated mesoporous TiO in terms of defect density. Photovoltaic performance of the DSSC which used SiO surface treatment showed that the effect of reverse electron recombination was significantly suppressed compared to the DSSC which did not use SiO treatment. Dark and illuminated I-V measurements of the DSSCs which used SiO surface treatment suggested that the lower thickness of SiO (5 cycles) did not block electron transport from the dye to TiO but thicker SiO (20 cycles) blocked but still the performance was better than the DSSC with no SiO treatment due to the control on density and activity of TiO surface states on electron transport.
Starting Page	002656
Ending Page	002660
File Size	1016638
Page Count	5
File Format	PDF
ISBN	9781424499663
ISSN	01608371
e-ISBN	9781424499656
DOI	10.1109/PVSC.2011.6186494
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-06-19
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Decision support systems Mesoporous materials Surface treatment Spontaneous emission Surface impedance Photovoltaic systems
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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