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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/3376
Title: Effects of co-adsorbate and additive on the performance of dye-sensitized solar cells: A photophysical study
Authors: Lee K.-M.
Suryanarayanan V.
Ho K.-C.
Justin Thomas, K. R.
Lin J.T.
Published in: Solar Energy Materials and Solar Cells
Abstract: The effects of deoxycholic acid (DCA) in a dye solution as a co-adsorbate and guanidinium thiocyanate (GuSCN) in an electrolyte as an additive, on the photovoltaic performance of dye-sensitized solar cells (DSSCs) based on organic dye containing thiophene and fluorine segments (FL dye1) and black dye (BD) were investigated. The presence of DCA, up to 2 mM, increases both the photovoltage and photocurrent of the DSSC incorporating BD and further addition leads to decrease in the photocurrent. On the other hand, in the case of the DSSC containing FL dye1, the photocurrent decrease and photovoltage increase with the increase of DCA concentration. The pulsed laser measurement showed that electron lifetime (Ï„e) of BD is higher than that of FL dye1 on a TiO2 electrode and the electron diffusion coefficient (De) of the latter is higher than that of the former where there is little deviation for both Ï„e and De with the addition of the DCA. The addition of GuSCN into electrolytes does enhance the photovoltage for DSSCs containing either FL dye1 or BD. This can be explained by the further adsorption of guanidinium cations following the dye adsorption that facilitates the self-assembly of dye molecules so as to either reduce the dark current or positively shift the conduction band edge of the TiO2. The value of Ï„e increases and the value of De decreases as a result of GuSCN addition. © 2007 Elsevier B.V. All rights reserved.
Citation: Solar Energy Materials and Solar Cells (2007), 91(15-16): 1426-1431
URI: https://doi.org/10.1016/j.solmat.2007.03.009
http://repository.iitr.ac.in/handle/123456789/3376
Issue Date: 2007
Keywords: Additive
Co-adsorption
Dye-sensitized solar cells
Electron transfer
ISSN: 9270248
Author Scopus IDs: 7501498671
6601983766
56962715200
57203389297
7501725859
Author Affiliations: Lee, K.-M., Institute of Polymer Science and Engineering, National Taiwan University, Taipei, 10617, Taiwan
Suryanarayanan, V., Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan
Ho, K.-C., Institute of Polymer Science and Engineering, National Taiwan University, Taipei, 10617, Taiwan, Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan
Justin Thomas, K.R., Institute of Chemistry, Academia Sinica, 115 Nankang, Taipei, Taiwan
Lin, J.T., Institute of Chemistry, Academia Sinica, 115 Nankang, Taipei, Taiwan
Corresponding Author: Ho, K.-C.; Institute of Polymer Science and Engineering, National Taiwan University, Taipei, 10617, Taiwan; email: kcho@ntu.edu.tw
Appears in Collections:Journal Publications [CY]

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