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Comparing spiro-OMeTAD and P3HT hole conductors in efficient solid state dye-sensitized solar cells

Yang, Lei ; Cappel, Ute B. ; Unger, Eva L. LU ; Karlsson, Martin LU ; Karlsson, Karl Martin ; Gabrielsson, Erik ; Sun, Licheng ; Boschloo, Gerrit ; Hagfeldt, Anders and Johansson, Erik M. J. (2012) In Physical Chemistry Chemical Physics 14(2). p.779-789
Abstract

Two hole conductor materials, spiro-OMeTAD and P3HT, were compared in solid-state dye-sensitized solar cells. Two organic dyes containing one anchor unit (D35) or two anchor units (M3) were used in the comparison. Absorbed photon to current conversion efficiency close to unity was obtained for the devices with spiro-OMeTAD. Energy conversion efficiencies of 4.7% and 4.9% were measured for the devices with spiro-OMeTAD and the dyes D35 and M3, respectively. For the devices using the P3HT hole conductor the results were rather different comparing the two dye molecules, with energy conversion efficiencies of 3.2% and 0.5% for D35 and M3, respectively. Photo-induced absorption measurements suggest that the regeneration of the dyes, and the... (More)

Two hole conductor materials, spiro-OMeTAD and P3HT, were compared in solid-state dye-sensitized solar cells. Two organic dyes containing one anchor unit (D35) or two anchor units (M3) were used in the comparison. Absorbed photon to current conversion efficiency close to unity was obtained for the devices with spiro-OMeTAD. Energy conversion efficiencies of 4.7% and 4.9% were measured for the devices with spiro-OMeTAD and the dyes D35 and M3, respectively. For the devices using the P3HT hole conductor the results were rather different comparing the two dye molecules, with energy conversion efficiencies of 3.2% and 0.5% for D35 and M3, respectively. Photo-induced absorption measurements suggest that the regeneration of the dyes, and the polymer infiltration, is not complete using P3HT, while spiro-OMeTAD regenerates the dyes efficiently. However, the TiO2/D35/P3HT system shows rather high energy conversion efficiency and electrochemical oxidation of the dyes on TiO2 indicates that D35 have a more efficient dye to dye hole conduction than M3, which thereby might explain the higher performance. The dye hole conduction may therefore be of significant importance for optimizing the energy conversion in such hybrid TiO2/dye/polymer systems.

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publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Chemistry Chemical Physics
volume
14
issue
2
pages
11 pages
publisher
Royal Society of Chemistry
external identifiers
  • scopus:83455236882
ISSN
1463-9076
DOI
10.1039/c1cp23031j
language
English
LU publication?
no
id
e4700a06-8d9d-4e1c-a233-77a8e25896f7
date added to LUP
2021-01-23 12:32:57
date last changed
2022-02-01 19:49:34
@article{e4700a06-8d9d-4e1c-a233-77a8e25896f7,
  abstract     = {{<p>Two hole conductor materials, spiro-OMeTAD and P3HT, were compared in solid-state dye-sensitized solar cells. Two organic dyes containing one anchor unit (D35) or two anchor units (M3) were used in the comparison. Absorbed photon to current conversion efficiency close to unity was obtained for the devices with spiro-OMeTAD. Energy conversion efficiencies of 4.7% and 4.9% were measured for the devices with spiro-OMeTAD and the dyes D35 and M3, respectively. For the devices using the P3HT hole conductor the results were rather different comparing the two dye molecules, with energy conversion efficiencies of 3.2% and 0.5% for D35 and M3, respectively. Photo-induced absorption measurements suggest that the regeneration of the dyes, and the polymer infiltration, is not complete using P3HT, while spiro-OMeTAD regenerates the dyes efficiently. However, the TiO<sub>2</sub>/D35/P3HT system shows rather high energy conversion efficiency and electrochemical oxidation of the dyes on TiO<sub>2</sub> indicates that D35 have a more efficient dye to dye hole conduction than M3, which thereby might explain the higher performance. The dye hole conduction may therefore be of significant importance for optimizing the energy conversion in such hybrid TiO<sub>2</sub>/dye/polymer systems.</p>}},
  author       = {{Yang, Lei and Cappel, Ute B. and Unger, Eva L. and Karlsson, Martin and Karlsson, Karl Martin and Gabrielsson, Erik and Sun, Licheng and Boschloo, Gerrit and Hagfeldt, Anders and Johansson, Erik M. J.}},
  issn         = {{1463-9076}},
  language     = {{eng}},
  month        = {{01}},
  number       = {{2}},
  pages        = {{779--789}},
  publisher    = {{Royal Society of Chemistry}},
  series       = {{Physical Chemistry Chemical Physics}},
  title        = {{Comparing spiro-OMeTAD and P3HT hole conductors in efficient solid state dye-sensitized solar cells}},
  url          = {{http://dx.doi.org/10.1039/c1cp23031j}},
  doi          = {{10.1039/c1cp23031j}},
  volume       = {{14}},
  year         = {{2012}},
}