Photophysical Study of a Self-Assembled Donor-Acceptor Two-Layer Film on TiO2

Kati Stranius; Lijo George; Alexander Efimov; Tero-Petri Ruoko; Juuso Pohjola; Nikolai V. Tkachenko

doi:10.1021/la5025873

Photophysical Study of a Self-Assembled Donor-Acceptor Two-Layer Film on TiO2

Kati Stranius^*
, Lijo George
, Alexander Efimov
, Tero-Petri Ruoko
, Juuso Pohjola
, Nikolai V. Tkachenko

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

20 Citations (Scopus)

58 Downloads (Pure)

Abstract

The self-assembled monolayer (SAM) technique was employed to fabricate a two-layer donoracceptor film on the surface of TiO2. The approach is based on using donor and acceptor compounds with anchoring groups of different lengths. The acceptor, a fullerene derivative, has a carboxyl anchor attached to the fullerene moiety via a short linker that places the fullerene close to the surface. The donor, a porphyrin derivative, is equipped with a long linker that can penetrate between the fullerenes and keep porphyrin on top of the fullerene layer. The two-layer fullereneporphyrin structures were deposited on a mesoporous film of TiO2 nanoparticles by immersing the TiO2 film sequentially into fullerene and porphyrin solutions. Transient absorption spectroscopy studies of the samples revealed that after the selective photoexcitation of porphyrin a fast (

Original language	English
Pages (from-to)	944-952
Number of pages	9
Journal	Langmuir
Volume	31
Issue number	3
DOIs	https://doi.org/10.1021/la5025873
Publication status	Published - 27 Jan 2015
Publication type	A1 Journal article-refereed

Funding

We thank the Academy of Finland (grants nos. 263486 and 270308) and The National Doctoral Programme in Nano-science (NGS-NANO) for funding.

Keywords

PHOTOINDUCED ELECTRON-TRANSFER
PORPHYRIN-FULLERENE DYADS
SOLAR-CELLS
CHARGE-SEPARATION
STATE
MONOLAYERS
DYNAMICS
ENERGY
PERFORMANCE
GENERATION

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Publication forum level 2

Access to Document

10.1021/la5025873

Photophysical_study_post-print
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Langmuir, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see 10.1021/la5025873.
Accepted author manuscript, 0.98 MB

http://urn.fi/URN:NBN:fi:tty-201612094852

Chemistry Labs for optical spectroscopy, analysis, and synthesis
Ruoko, T.-P. (Contact) & Efimov, A. (Contact)
Materials Science and Environmental Engineering
Facility/equipment: Research infrastructure

Cite this

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title = "Photophysical Study of a Self-Assembled Donor-Acceptor Two-Layer Film on TiO2",

abstract = "The self-assembled monolayer (SAM) technique was employed to fabricate a two-layer donoracceptor film on the surface of TiO2. The approach is based on using donor and acceptor compounds with anchoring groups of different lengths. The acceptor, a fullerene derivative, has a carboxyl anchor attached to the fullerene moiety via a short linker that places the fullerene close to the surface. The donor, a porphyrin derivative, is equipped with a long linker that can penetrate between the fullerenes and keep porphyrin on top of the fullerene layer. The two-layer fullereneporphyrin structures were deposited on a mesoporous film of TiO2 nanoparticles by immersing the TiO2 film sequentially into fullerene and porphyrin solutions. Transient absorption spectroscopy studies of the samples revealed that after the selective photoexcitation of porphyrin a fast (",

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AB - The self-assembled monolayer (SAM) technique was employed to fabricate a two-layer donoracceptor film on the surface of TiO2. The approach is based on using donor and acceptor compounds with anchoring groups of different lengths. The acceptor, a fullerene derivative, has a carboxyl anchor attached to the fullerene moiety via a short linker that places the fullerene close to the surface. The donor, a porphyrin derivative, is equipped with a long linker that can penetrate between the fullerenes and keep porphyrin on top of the fullerene layer. The two-layer fullereneporphyrin structures were deposited on a mesoporous film of TiO2 nanoparticles by immersing the TiO2 film sequentially into fullerene and porphyrin solutions. Transient absorption spectroscopy studies of the samples revealed that after the selective photoexcitation of porphyrin a fast (

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KW - MONOLAYERS

KW - DYNAMICS

KW - ENERGY

KW - PERFORMANCE

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Photophysical Study of a Self-Assembled Donor-Acceptor Two-Layer Film on TiO2

Abstract

Funding

Keywords

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