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Effect of the preparation procedure on the morphology of thin TiO2 films and their device performance in small-molecule bilayer hybrid solar cells

Unger, Eva L. LU ; Spadavecchia, Francesca ; Nonomura, Kazuteru ; Palmgren, Pål LU ; Cappelletti, Giuseppe ; Hagfeldt, Anders ; Johansson, Erik M. J. and Boschloo, Gerrit (2012) In ACS Applied Materials and Interfaces 4(11). p.5997-6004
Abstract

Flat titanium dioxide films, to be used as the acceptor layer in bilayer hybrid solar cell devices, were prepared by spray-pyrolysis and by spin-casting. Both preparation methods resulted in anatase titania films with similar optical and electronic properties but considerably different film morphologies. Spray pyrolysis resulted in dense TiO2 films grown onto and affected by the surface roughness of the underlying conducting glass substrates. The spin-casting preparation procedure resulted in nanoporous titania films. Hybrid solar cell devices with varying layer thickness of the small-molecule semiconducting dye TDCV-TPA were investigated. Devices built with spray-pyrolyzed titania substrates yielded conversion efficiencies... (More)

Flat titanium dioxide films, to be used as the acceptor layer in bilayer hybrid solar cell devices, were prepared by spray-pyrolysis and by spin-casting. Both preparation methods resulted in anatase titania films with similar optical and electronic properties but considerably different film morphologies. Spray pyrolysis resulted in dense TiO2 films grown onto and affected by the surface roughness of the underlying conducting glass substrates. The spin-casting preparation procedure resulted in nanoporous titania films. Hybrid solar cell devices with varying layer thickness of the small-molecule semiconducting dye TDCV-TPA were investigated. Devices built with spray-pyrolyzed titania substrates yielded conversion efficiencies up to 0.47%. Spin-cast titania substrates exhibited short circuits for thin dye layer thickness. For thicker dye layers the performance of these devices was up to 0.6% due to the higher interfacial area for charge separation of these nanoporous TiO2 substrates.

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author
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publishing date
type
Contribution to journal
publication status
published
subject
keywords
hybrid solar cells, small-molecule semiconductor, spin-casting, spray-pyrolysis, titanium dioxide
in
ACS Applied Materials and Interfaces
volume
4
issue
11
pages
8 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:84870554272
  • pmid:23066994
ISSN
1944-8244
DOI
10.1021/am301604x
language
English
LU publication?
no
id
593ed6d0-5725-4d2f-840a-554a87e3c33e
date added to LUP
2021-01-23 12:31:58
date last changed
2024-01-03 05:41:18
@article{593ed6d0-5725-4d2f-840a-554a87e3c33e,
  abstract     = {{<p>Flat titanium dioxide films, to be used as the acceptor layer in bilayer hybrid solar cell devices, were prepared by spray-pyrolysis and by spin-casting. Both preparation methods resulted in anatase titania films with similar optical and electronic properties but considerably different film morphologies. Spray pyrolysis resulted in dense TiO<sub>2</sub> films grown onto and affected by the surface roughness of the underlying conducting glass substrates. The spin-casting preparation procedure resulted in nanoporous titania films. Hybrid solar cell devices with varying layer thickness of the small-molecule semiconducting dye TDCV-TPA were investigated. Devices built with spray-pyrolyzed titania substrates yielded conversion efficiencies up to 0.47%. Spin-cast titania substrates exhibited short circuits for thin dye layer thickness. For thicker dye layers the performance of these devices was up to 0.6% due to the higher interfacial area for charge separation of these nanoporous TiO<sub>2</sub> substrates.</p>}},
  author       = {{Unger, Eva L. and Spadavecchia, Francesca and Nonomura, Kazuteru and Palmgren, Pål and Cappelletti, Giuseppe and Hagfeldt, Anders and Johansson, Erik M. J. and Boschloo, Gerrit}},
  issn         = {{1944-8244}},
  keywords     = {{hybrid solar cells; small-molecule semiconductor; spin-casting; spray-pyrolysis; titanium dioxide}},
  language     = {{eng}},
  month        = {{11}},
  number       = {{11}},
  pages        = {{5997--6004}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{ACS Applied Materials and Interfaces}},
  title        = {{Effect of the preparation procedure on the morphology of thin TiO<sub>2</sub> films and their device performance in small-molecule bilayer hybrid solar cells}},
  url          = {{http://dx.doi.org/10.1021/am301604x}},
  doi          = {{10.1021/am301604x}},
  volume       = {{4}},
  year         = {{2012}},
}