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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/3329
Title: Insights into the co-sensitizer adsorption kinetics for complementary organic dye-sensitized solar cells
Authors: Lin L.-Y.
Yeh M.-H.
Lee C.-P.
Chang J.
Baheti A.
Vittal R.
Justin Thomas K.R.
Ho K.-C.
Published in: Journal of Power Sources
Abstract: Co-sensitization is a well-known method to broaden the light absorption wavelength. The co-sensitizer adsorption kinetics in dye-sensitized solar cells (DSSCs) is investigated by using simple UV-visible absorption spectra and images for co-sensitizers before and after TiO2 films soaking. The adsorption rate and surface coverage on TiO2 films of the co-sensitizers, i.e., a metal-free squaraine dye (SQ2) and a diarylaminofluorene-based organic dye (JD1), are also studied to explain the performance of DSSCs. The power conversion efficiency (η) of the co-sensitized DSSC is enhanced due to the cooperative interactions of the organic co-sensitizers. A wide absorption wavelength (400-750 nm) for light harvesting is found for the co-sensitizer at the molar ratio of 6 to 4 for JD1 to SQ2 dye, and thereby an η value of 6.36% is achieved for the pertinent DSSC, which is much higher than those of the cells sensitized with individual dyes absorbing narrow wavelength of light, i.e., η of 5.44% and 4.11% for the DSSC sensitized with JD1 (absorption wavelength from 400 to 550 nm) and SQ2 dye (absorption wavelength from 550 to 750 nm), respectively. © 2013 Elsevier B.V. All rights reserved.
Citation: Journal of Power Sources (2014), 247(): 906-914
URI: https://doi.org/10.1016/j.jpowsour.2013.08.127
http://repository.iitr.ac.in/handle/123456789/3329
Issue Date: 2014
Keywords: Co-sensitization
Dye-sensitized solar cells
Incident photon-to-current conversion efficiency
Metal-free
Organic sensitizer
UV-visible absorption spectra
ISSN: 3787753
Author Scopus IDs: 27967875100
36678491100
55050004100
23968068100
26638669500
6602857195
57203389297
56962715200
Author Affiliations: Lin, L.-Y., Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
Yeh, M.-H., Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
Lee, C.-P., Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
Chang, J., Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
Baheti, A., Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247 667, India
Vittal, R., Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
Justin Thomas, K.R., Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247 667, India
Ho, K.-C., Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
Funding Details: This work was supported in part by the National Science Council of Taiwan , under grant numbers NSC 100-2923-E-002-004-MY3 and NSC 101-3113-E-008-003 . Some of the instruments used in this study were made available through the financial support of the Academia Sinica, Taipei, Taiwan , under grant AS-100-TP-A05 . Appendix A
Corresponding Author: Ho, K.-C.; Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan; email: kcho@ntu.edu.tw
Appears in Collections:Journal Publications [CY]

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