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Visualizing Interfacial Charge Transfer in Ru-Dye-Sensitized TiO2 Nanoparticles Using X-ray Transient Absorption Spectroscopy

Zhang, Xiaoyi; Smolentsev, Grigory LU ; Guo, Jianchang; Attenkofer, Klaus; Kurtz, Chuck; Jennings, Guy; Lockard, Jenny V.; Stickrath, Andrew B. and Chen, Lin X. (2011) In The Journal of Physical Chemistry Letters 2(6). p.628-632
Abstract
A molecular level understanding of the structural reorganization accompanying interfacial electron transfer is important for rational design of solar cells. Here we have applied XTA (X-ray transient absorption) spectroscopy to study transient structures in a heterogeneous interfacial system mimicking the charge separation process in dye-sensitized solar cell (DSSC) with Ru(dcbpy)(2)(NCS)(2) (RuN3) dye adsorbed to TiO2 nanopartide surfaces. The results show that the average Ru-NCS bond length reduces by 0.06 angstrom, whereas the average Ru-N(dcbpy) bond length remains nearly unchanged after the electron injection. The differences in bond-order change and steric hindrance between two types of ligands are attributed to their structural... (More)
A molecular level understanding of the structural reorganization accompanying interfacial electron transfer is important for rational design of solar cells. Here we have applied XTA (X-ray transient absorption) spectroscopy to study transient structures in a heterogeneous interfacial system mimicking the charge separation process in dye-sensitized solar cell (DSSC) with Ru(dcbpy)(2)(NCS)(2) (RuN3) dye adsorbed to TiO2 nanopartide surfaces. The results show that the average Ru-NCS bond length reduces by 0.06 angstrom, whereas the average Ru-N(dcbpy) bond length remains nearly unchanged after the electron injection. The differences in bond-order change and steric hindrance between two types of ligands are attributed to their structural response in the charge separation. This study extends the application of XTA into optically opaque hybrid interfacial systems relevant to the solar energy conversion. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
The Journal of Physical Chemistry Letters
volume
2
issue
6
pages
628 - 632
publisher
The American Chemical Society
external identifiers
  • wos:000288685000021
  • scopus:79952796819
ISSN
1948-7185
DOI
10.1021/jz200122r
language
English
LU publication?
yes
id
df708c13-a993-41f9-b522-514eaa65c338 (old id 1925874)
date added to LUP
2011-05-12 14:48:52
date last changed
2017-09-03 03:58:41
@article{df708c13-a993-41f9-b522-514eaa65c338,
  abstract     = {A molecular level understanding of the structural reorganization accompanying interfacial electron transfer is important for rational design of solar cells. Here we have applied XTA (X-ray transient absorption) spectroscopy to study transient structures in a heterogeneous interfacial system mimicking the charge separation process in dye-sensitized solar cell (DSSC) with Ru(dcbpy)(2)(NCS)(2) (RuN3) dye adsorbed to TiO2 nanopartide surfaces. The results show that the average Ru-NCS bond length reduces by 0.06 angstrom, whereas the average Ru-N(dcbpy) bond length remains nearly unchanged after the electron injection. The differences in bond-order change and steric hindrance between two types of ligands are attributed to their structural response in the charge separation. This study extends the application of XTA into optically opaque hybrid interfacial systems relevant to the solar energy conversion.},
  author       = {Zhang, Xiaoyi and Smolentsev, Grigory and Guo, Jianchang and Attenkofer, Klaus and Kurtz, Chuck and Jennings, Guy and Lockard, Jenny V. and Stickrath, Andrew B. and Chen, Lin X.},
  issn         = {1948-7185},
  language     = {eng},
  number       = {6},
  pages        = {628--632},
  publisher    = {The American Chemical Society},
  series       = {The Journal of Physical Chemistry Letters},
  title        = {Visualizing Interfacial Charge Transfer in Ru-Dye-Sensitized TiO2 Nanoparticles Using X-ray Transient Absorption Spectroscopy},
  url          = {http://dx.doi.org/10.1021/jz200122r},
  volume       = {2},
  year         = {2011},
}