Abstract
A series of cobalt-containing redox couples, based on [Co(1, 10-phenanthroline)3](ClO4)2 and its derivatives, were prepared for use as regenerators/shuttles in dye-sensitized solar cells featuring modified TiO2 photoelectrodes. Surface modification and trap-state passivation of the TiO2 nanoparticle film electrodes were accomplished via atomic layer deposition of an ultrathin alumina coating. Electron lifetimes were then extracted from open-circuit voltage decay measurements. Cells employing alumina barrier/passivation layers exhibited higher open-circuit voltages as shuttles with more positive redox potentials were used, with the Co(5-nitro-phen)33+/2+ couple exhibiting the highest V∞ (0.844 V). Analysis of the open-circuit voltages and electron lifetimes indicate Marcus normal-region behavior for back electron transfer from the TiO2 photoanode to these compounds.
| Original language | English |
|---|---|
| Pages (from-to) | 9082-9087 |
| Number of pages | 6 |
| Journal | Langmuir |
| Volume | 26 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - Jun 1 2010 |
Fingerprint
ASJC Scopus subject areas
- Electrochemistry
- Condensed Matter Physics
- Surfaces and Interfaces
- Materials Science(all)
- Spectroscopy
Cite this
Dye-sensitized solar cells : Driving-force effects on electron recombination dynamics with cobalt-based shuttles. / DeVries, Michael J.; Pellin, Michael J.; Hupp, Joseph T.
In: Langmuir, Vol. 26, No. 11, 01.06.2010, p. 9082-9087.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Dye-sensitized solar cells
T2 - Driving-force effects on electron recombination dynamics with cobalt-based shuttles
AU - DeVries, Michael J.
AU - Pellin, Michael J.
AU - Hupp, Joseph T
PY - 2010/6/1
Y1 - 2010/6/1
N2 - A series of cobalt-containing redox couples, based on [Co(1, 10-phenanthroline)3](ClO4)2 and its derivatives, were prepared for use as regenerators/shuttles in dye-sensitized solar cells featuring modified TiO2 photoelectrodes. Surface modification and trap-state passivation of the TiO2 nanoparticle film electrodes were accomplished via atomic layer deposition of an ultrathin alumina coating. Electron lifetimes were then extracted from open-circuit voltage decay measurements. Cells employing alumina barrier/passivation layers exhibited higher open-circuit voltages as shuttles with more positive redox potentials were used, with the Co(5-nitro-phen)33+/2+ couple exhibiting the highest V∞ (0.844 V). Analysis of the open-circuit voltages and electron lifetimes indicate Marcus normal-region behavior for back electron transfer from the TiO2 photoanode to these compounds.
AB - A series of cobalt-containing redox couples, based on [Co(1, 10-phenanthroline)3](ClO4)2 and its derivatives, were prepared for use as regenerators/shuttles in dye-sensitized solar cells featuring modified TiO2 photoelectrodes. Surface modification and trap-state passivation of the TiO2 nanoparticle film electrodes were accomplished via atomic layer deposition of an ultrathin alumina coating. Electron lifetimes were then extracted from open-circuit voltage decay measurements. Cells employing alumina barrier/passivation layers exhibited higher open-circuit voltages as shuttles with more positive redox potentials were used, with the Co(5-nitro-phen)33+/2+ couple exhibiting the highest V∞ (0.844 V). Analysis of the open-circuit voltages and electron lifetimes indicate Marcus normal-region behavior for back electron transfer from the TiO2 photoanode to these compounds.
UR - http://www.scopus.com/inward/record.url?scp=77954544211&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77954544211&partnerID=8YFLogxK
U2 - 10.1021/la904643t
DO - 10.1021/la904643t
M3 - Article
C2 - 20148512
AN - SCOPUS:77954544211
VL - 26
SP - 9082
EP - 9087
JO - Langmuir
JF - Langmuir
SN - 0743-7463
IS - 11
ER -