Impact of the Anchoring Ligand on Electron Injection and Recombination Dynamics at the Interface of Novel Asymmetric Push-Pull Zinc Phthalocyanines and TiO2

Divya Sharma, Gerrit Willem Steen, Jeroen P. Korterik, M. Garcia-Iglesias, P Vazquez, T. Torres, Jennifer Lynn Herek, Jannetje Maria Huijser

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Abstract

Phthalocyanines are promising photosensitizers for dye-sensitized solar cells (DSSCs). A parameter that has been problematic for a long time involves electron injection (EI) into the TiO2. The development of push-pull phthalocyanines shows great potential to improve the ratio of EI to back electron transfer (BET). We have studied the impact of the anchoring ligand on EI and BET using transient absorption. The best performing derivative, which has a dicarboxylic acid anchoring ligand (TT15, DSSC efficiency of 3.96%), shows the fastest EI. The EI process occurs via an ultrafast component (~700 fs for all derivatives) and a slower component (5.8 ps for TT15). The ps component is considerably slower for the other derivatives studied. Also BET depends on the anchoring ligand and is the slowest for TT15. This knowledge is essential for the optimization of the EI/BET ratio and the efficiency of a phthalocyanine-based DSSC.
Original languageEnglish
Pages (from-to)25397-25404
Number of pages8
JournalJournal of physical chemistry C
Volume117
Issue number48
DOIs
Publication statusPublished - 2013

Fingerprint

Electron injection
Zinc
zinc
Ligands
injection
ligands
electron transfer
electrons
Electrons
solar cells
dyes
Derivatives
Dicarboxylic Acids
Photosensitizing Agents
Photosensitizers
dicarboxylic acids
Zn(II)-phthalocyanine
optimization
Acids
Dye-sensitized solar cells

Keywords

  • METIS-300926
  • IR-88672

Cite this

@article{13ea611a176a42418100803bb7b3276f,
title = "Impact of the Anchoring Ligand on Electron Injection and Recombination Dynamics at the Interface of Novel Asymmetric Push-Pull Zinc Phthalocyanines and TiO2",
abstract = "Phthalocyanines are promising photosensitizers for dye-sensitized solar cells (DSSCs). A parameter that has been problematic for a long time involves electron injection (EI) into the TiO2. The development of push-pull phthalocyanines shows great potential to improve the ratio of EI to back electron transfer (BET). We have studied the impact of the anchoring ligand on EI and BET using transient absorption. The best performing derivative, which has a dicarboxylic acid anchoring ligand (TT15, DSSC efficiency of 3.96{\%}), shows the fastest EI. The EI process occurs via an ultrafast component (~700 fs for all derivatives) and a slower component (5.8 ps for TT15). The ps component is considerably slower for the other derivatives studied. Also BET depends on the anchoring ligand and is the slowest for TT15. This knowledge is essential for the optimization of the EI/BET ratio and the efficiency of a phthalocyanine-based DSSC.",
keywords = "METIS-300926, IR-88672",
author = "Divya Sharma and Steen, {Gerrit Willem} and Korterik, {Jeroen P.} and M. Garcia-Iglesias and P Vazquez and T. Torres and Herek, {Jennifer Lynn} and Huijser, {Jannetje Maria}",
year = "2013",
doi = "10.1021/jp410080a",
language = "English",
volume = "117",
pages = "25397--25404",
journal = "Journal of physical chemistry C",
issn = "1932-7447",
publisher = "American Chemical Society",
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}

Impact of the Anchoring Ligand on Electron Injection and Recombination Dynamics at the Interface of Novel Asymmetric Push-Pull Zinc Phthalocyanines and TiO2. / Sharma, Divya; Steen, Gerrit Willem; Korterik, Jeroen P.; Garcia-Iglesias, M.; Vazquez, P; Torres, T.; Herek, Jennifer Lynn; Huijser, Jannetje Maria.

In: Journal of physical chemistry C, Vol. 117, No. 48, 2013, p. 25397-25404.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Impact of the Anchoring Ligand on Electron Injection and Recombination Dynamics at the Interface of Novel Asymmetric Push-Pull Zinc Phthalocyanines and TiO2

AU - Sharma, Divya

AU - Steen, Gerrit Willem

AU - Korterik, Jeroen P.

AU - Garcia-Iglesias, M.

AU - Vazquez, P

AU - Torres, T.

AU - Herek, Jennifer Lynn

AU - Huijser, Jannetje Maria

PY - 2013

Y1 - 2013

N2 - Phthalocyanines are promising photosensitizers for dye-sensitized solar cells (DSSCs). A parameter that has been problematic for a long time involves electron injection (EI) into the TiO2. The development of push-pull phthalocyanines shows great potential to improve the ratio of EI to back electron transfer (BET). We have studied the impact of the anchoring ligand on EI and BET using transient absorption. The best performing derivative, which has a dicarboxylic acid anchoring ligand (TT15, DSSC efficiency of 3.96%), shows the fastest EI. The EI process occurs via an ultrafast component (~700 fs for all derivatives) and a slower component (5.8 ps for TT15). The ps component is considerably slower for the other derivatives studied. Also BET depends on the anchoring ligand and is the slowest for TT15. This knowledge is essential for the optimization of the EI/BET ratio and the efficiency of a phthalocyanine-based DSSC.

AB - Phthalocyanines are promising photosensitizers for dye-sensitized solar cells (DSSCs). A parameter that has been problematic for a long time involves electron injection (EI) into the TiO2. The development of push-pull phthalocyanines shows great potential to improve the ratio of EI to back electron transfer (BET). We have studied the impact of the anchoring ligand on EI and BET using transient absorption. The best performing derivative, which has a dicarboxylic acid anchoring ligand (TT15, DSSC efficiency of 3.96%), shows the fastest EI. The EI process occurs via an ultrafast component (~700 fs for all derivatives) and a slower component (5.8 ps for TT15). The ps component is considerably slower for the other derivatives studied. Also BET depends on the anchoring ligand and is the slowest for TT15. This knowledge is essential for the optimization of the EI/BET ratio and the efficiency of a phthalocyanine-based DSSC.

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KW - IR-88672

U2 - 10.1021/jp410080a

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M3 - Article

VL - 117

SP - 25397

EP - 25404

JO - Journal of physical chemistry C

JF - Journal of physical chemistry C

SN - 1932-7447

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