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Rheological and electrochemical properties of nanoclay added electrolyte for dye sensitized solar cells

Ding, B and Jung, Y and Kim, DH and Seong, WM and Kim, SD and Woo, SK and Lee, JK (2014) Rheological and electrochemical properties of nanoclay added electrolyte for dye sensitized solar cells. Electrochimica Acta, 144. 275 - 281. ISSN 0013-4686

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Abstract

We explored quasi-solid electrolyte containing nanoclay and iodide/triiodide (I-/I3-) redox mediator in dye sensitized solar cells (DSSCs). Compared with traditional iodine based liquid electrolyte, nanoclay-based quasi-solid electrolyte provided similar conversion efficiency and carrier diffusivity. In addition, the nanoclay in the electrolyte increases thermal stability and suppresses aging behavior. The rheology measurement showed that the enhancement was attributed to the gelation of the quasi-solid electrolyte. The addition of nanoclay increased the optimum amount of iodine in the electrolyte, since a partial adsorption of iodide ions on the positive surface of the nanoclay reduces ion concentration in the electrolyte and changes the carrier transfer path. This adsorption increased in the quantity of the iodide to optimize the performance of the quasi-solid electrolyte. We have found that the charge transport in the electrolyte occurs via two parallel processes: normal physical diffusion and grotthus-type bond exchange.


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Details

Item Type: Article
Status: Published
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Ding, B
Jung, Y
Kim, DH
Seong, WM
Kim, SD
Woo, SK
Lee, JKjul37@pitt.eduJUL370000-0002-7778-7679
Centers: Other Centers, Institutes, Offices, or Units > Petersen Institute of NanoScience and Engineering
Date: 20 October 2014
Date Type: Publication
Journal or Publication Title: Electrochimica Acta
Volume: 144
Page Range: 275 - 281
DOI or Unique Handle: 10.1016/j.electacta.2014.08.061
Schools and Programs: Swanson School of Engineering > Mechanical Engineering and Materials Science
Refereed: Yes
ISSN: 0013-4686
Date Deposited: 07 Nov 2014 16:58
Last Modified: 22 Jun 2021 13:56
URI: http://d-scholarship.pitt.edu/id/eprint/23471

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