Mass transfer of polypyridyl cobalt complexes within mesoporous TiO2 dye-sensitized solar cell photoanodes

C. Michael Elliott; Jeremy J. Nelson; Tyson J. Amick; Hyung Kee Seo; Frederick F. Peelor; Dustin W. Keller

Mass transfer of polypyridyl cobalt complexes within mesoporous TiO₂ dye-sensitized solar cell photoanodes

C. Michael Elliott^*
, Jeremy J. Nelson
, Tyson J. Amick
, Hyung Kee Seo
, Frederick F. Peelor
, Dustin W. Keller

^*Corresponding author for this work

Division of Chemical Engineering

Colorado State University

Research output: Contribution to conference › Conference paper › peer-review

Abstract

DSSCs with cobalt mediators display a qualitatively different response to the onset of transient illumination than ones with I^-/I₃^-. A sharp decline in the initial current over ∼1 s is observed, suggestive of solution polarization. Consistent with this hypothesis are the observations that viscosity and Co(dtb)₃²⁺ concentration significantly affect the transient behavior. Rotated disk electrode (RDE) experiments using Koutecký-Levich analyses were performed to determine the diffusion coefficients of both Co(dtb)₃²⁺ and I₃^- through typical nanocrystalline TiO₂ films. Using experimental viscosities, it has been calculated that the effective diffusion coefficients through TiO₂ films in DSSCs are ∼2 × 10^-7 cm² s^-1 for Co(dtb)₃²⁺ and ∼2 × 10^-6 cm² s^-1 for I₃^-. This significant disparity between D in bulk solution and within the mesoporous TiO₂ suggests how changes in the photoanode architecture could significantly improve efficiency of Co(dtb)₃²⁺-mediated DSSCs.

Original language	English
Title of host publication	American Chemical Society - 237th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers
State	Published - 2009
Event	237th National Meeting and Exposition of the American Chemical Society, ACS 2009 - Salt Lake City, UT, United States Duration: 2009.03.22 → 2009.03.26

Publication series

Name	ACS National Meeting Book of Abstracts
ISSN (Print)	0065-7727

Conference

Conference	237th National Meeting and Exposition of the American Chemical Society, ACS 2009
Country/Territory	United States
City	Salt Lake City, UT
Period	09.03.22 → 09.03.26

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Cite this

@inproceedings{0c4469a444ae4d7e92b41c136c9ce6d9,

title = "Mass transfer of polypyridyl cobalt complexes within mesoporous TiO2 dye-sensitized solar cell photoanodes",

abstract = "DSSCs with cobalt mediators display a qualitatively different response to the onset of transient illumination than ones with I-/I3-. A sharp decline in the initial current over ∼1 s is observed, suggestive of solution polarization. Consistent with this hypothesis are the observations that viscosity and Co(dtb)32+ concentration significantly affect the transient behavior. Rotated disk electrode (RDE) experiments using Kouteck{\'y}-Levich analyses were performed to determine the diffusion coefficients of both Co(dtb)32+ and I3- through typical nanocrystalline TiO2 films. Using experimental viscosities, it has been calculated that the effective diffusion coefficients through TiO2 films in DSSCs are ∼2 × 10-7 cm2 s-1 for Co(dtb)32+ and ∼2 × 10-6 cm2 s-1 for I3-. This significant disparity between D in bulk solution and within the mesoporous TiO2 suggests how changes in the photoanode architecture could significantly improve efficiency of Co(dtb)32+-mediated DSSCs.",

author = "Elliott, \{C. Michael\} and Nelson, \{Jeremy J.\} and Amick, \{Tyson J.\} and Seo, \{Hyung Kee\} and Peelor, \{Frederick F.\} and Keller, \{Dustin W.\}",

year = "2009",

language = "English",

isbn = "9780841224414",

series = "ACS National Meeting Book of Abstracts",

booktitle = "American Chemical Society - 237th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers",

note = "237th National Meeting and Exposition of the American Chemical Society, ACS 2009 ; Conference date: 22-03-2009 Through 26-03-2009",

}

Elliott, CM, Nelson, JJ, Amick, TJ, Seo, HK, Peelor, FF & Keller, DW 2009, Mass transfer of polypyridyl cobalt complexes within mesoporous TiO₂ dye-sensitized solar cell photoanodes. in American Chemical Society - 237th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers. ACS National Meeting Book of Abstracts, 237th National Meeting and Exposition of the American Chemical Society, ACS 2009, Salt Lake City, UT, United States, 09.03.22.

Mass transfer of polypyridyl cobalt complexes within mesoporous TiO₂ dye-sensitized solar cell photoanodes. / Elliott, C. Michael; Nelson, Jeremy J.; Amick, Tyson J. et al.
American Chemical Society - 237th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers. 2009. (ACS National Meeting Book of Abstracts).

Research output: Contribution to conference › Conference paper › peer-review

TY - GEN

T1 - Mass transfer of polypyridyl cobalt complexes within mesoporous TiO2 dye-sensitized solar cell photoanodes

AU - Elliott, C. Michael

AU - Nelson, Jeremy J.

AU - Amick, Tyson J.

AU - Seo, Hyung Kee

AU - Peelor, Frederick F.

AU - Keller, Dustin W.

PY - 2009

Y1 - 2009

N2 - DSSCs with cobalt mediators display a qualitatively different response to the onset of transient illumination than ones with I-/I3-. A sharp decline in the initial current over ∼1 s is observed, suggestive of solution polarization. Consistent with this hypothesis are the observations that viscosity and Co(dtb)32+ concentration significantly affect the transient behavior. Rotated disk electrode (RDE) experiments using Koutecký-Levich analyses were performed to determine the diffusion coefficients of both Co(dtb)32+ and I3- through typical nanocrystalline TiO2 films. Using experimental viscosities, it has been calculated that the effective diffusion coefficients through TiO2 films in DSSCs are ∼2 × 10-7 cm2 s-1 for Co(dtb)32+ and ∼2 × 10-6 cm2 s-1 for I3-. This significant disparity between D in bulk solution and within the mesoporous TiO2 suggests how changes in the photoanode architecture could significantly improve efficiency of Co(dtb)32+-mediated DSSCs.

AB - DSSCs with cobalt mediators display a qualitatively different response to the onset of transient illumination than ones with I-/I3-. A sharp decline in the initial current over ∼1 s is observed, suggestive of solution polarization. Consistent with this hypothesis are the observations that viscosity and Co(dtb)32+ concentration significantly affect the transient behavior. Rotated disk electrode (RDE) experiments using Koutecký-Levich analyses were performed to determine the diffusion coefficients of both Co(dtb)32+ and I3- through typical nanocrystalline TiO2 films. Using experimental viscosities, it has been calculated that the effective diffusion coefficients through TiO2 films in DSSCs are ∼2 × 10-7 cm2 s-1 for Co(dtb)32+ and ∼2 × 10-6 cm2 s-1 for I3-. This significant disparity between D in bulk solution and within the mesoporous TiO2 suggests how changes in the photoanode architecture could significantly improve efficiency of Co(dtb)32+-mediated DSSCs.

UR - https://www.scopus.com/pages/publications/78649513923

M3 - Conference paper

AN - SCOPUS:78649513923

SN - 9780841224414

T3 - ACS National Meeting Book of Abstracts

BT - American Chemical Society - 237th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers

T2 - 237th National Meeting and Exposition of the American Chemical Society, ACS 2009

Y2 - 22 March 2009 through 26 March 2009

ER -