Electron transfer kinetics of phosphonic acid functionalized zinc phthalocyanine monolayers on ITO by potential modulated attenuated total reflectance

Hsiao Chu Lin, Nathan W. Polaske, Dominic V Mcgrath, Steven S Saavedra

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Phthlocyanines are candidate building blocks for organic photovoltaic (OPV) devices. Crucial to the performance of OPV devices is the charge-injection barrier between the indium tin oxide (ITO) electrode and the organic semiconductor that arises from poor wettability of ITO surface towards the organic layer. Phosphonic acid (PA)-linked Pcs are an excellent candidate in this context because of the strong affinity of PAs towards ITO. Here monolayer films of zinc phthalocyanine (ZnPc-PA), tethered to ITO via the PA moiety, were characterized by polarized attenuated total reflectance (ATR) spectroscopy. The monomeric form of ZnPc-PA exhibit a more flat orientation, whereas the aggregated form of ZnPc-PA is oriented in a more upright arrangement. The electron transfer rate constants across the monolayer-ITO interface are measured using potential modulated attenuated total reflectance (PM-ATR) in TE and TM polarizations. This allows rate constants to be determined for sub-populations of molecules that are oriented predominately in-plane (monomers) and out-of-plane (aggregates), respectively.

Original languageEnglish (US)
Title of host publicationACS National Meeting Book of Abstracts
StatePublished - 2011
Event242nd ACS National Meeting and Exposition - Denver, CO, United States
Duration: Aug 28 2011Sep 1 2011

Other

Other242nd ACS National Meeting and Exposition
CountryUnited States
CityDenver, CO
Period8/28/119/1/11

Fingerprint

Tin oxides
Indium
Monolayers
Zinc
Kinetics
Acids
Electrons
Rate constants
Charge injection
Semiconducting organic compounds
Wetting
Monomers
indium tin oxide
phosphonic acid
Zn(II)-phthalocyanine
Spectroscopy
Polarization
Electrodes
Molecules

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Electron transfer kinetics of phosphonic acid functionalized zinc phthalocyanine monolayers on ITO by potential modulated attenuated total reflectance. / Lin, Hsiao Chu; Polaske, Nathan W.; Mcgrath, Dominic V; Saavedra, Steven S.

ACS National Meeting Book of Abstracts. 2011.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Lin, HC, Polaske, NW, Mcgrath, DV & Saavedra, SS 2011, Electron transfer kinetics of phosphonic acid functionalized zinc phthalocyanine monolayers on ITO by potential modulated attenuated total reflectance. in ACS National Meeting Book of Abstracts. 242nd ACS National Meeting and Exposition, Denver, CO, United States, 8/28/11.
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