Local interfacial electronic structure of thin pentacene films on Si(111)

Michael L. Blumenfeld; Mary P. Steele; Brandon S. Tackett; Oliver L.A. Monti

Local interfacial electronic structure of thin pentacene films on Si(111)

Michael L. Blumenfeld, Mary P. Steele, Brandon S. Tackett, Oliver L.A. Monti

Chemistry and Biochemistry

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Organic photovoltaic (OPV) devices offer a promising route to low-cost solar energy harvesting. These systems have demonstrated heterogeneous ultrafast charge transfer dynamics in part due to complex micro and nanoscale disorder at semiconductor domain interfaces. We have investigated the effects of local morphology on interfacial electronic structure using the model system of pentacene grown on Si(111). Spatially resolved two photon photoemission spectroscopy was used to map local variations in interfacial dipole formation and intraband state densities. These results are correlated with film topography as measured by AFM and bulk surface character as measured by conventional UPS. Findings are discussed in the framework of their implications on charge transfer dynamics and successful OPV development.

Original language	English (US)
Title of host publication	American Chemical Society - 235th National Meeting, Abstracts of Scientific Papers
State	Published - Dec 1 2008
Event	235th National Meeting of the American Chemical Society, ACS 2008 - New Orleans, LA, United States Duration: Apr 6 2008 → Apr 10 2008

Publication series

Name	ACS National Meeting Book of Abstracts
ISSN (Print)	0065-7727

Other

Other	235th National Meeting of the American Chemical Society, ACS 2008
Country	United States
City	New Orleans, LA
Period	4/6/08 → 4/10/08

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)

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Local interfacial electronic structure of thin pentacene films on Si(111). / Blumenfeld, Michael L.; Steele, Mary P.; Tackett, Brandon S.; Monti, Oliver L.A.

American Chemical Society - 235th National Meeting, Abstracts of Scientific Papers. 2008. (ACS National Meeting Book of Abstracts).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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abstract = "Organic photovoltaic (OPV) devices offer a promising route to low-cost solar energy harvesting. These systems have demonstrated heterogeneous ultrafast charge transfer dynamics in part due to complex micro and nanoscale disorder at semiconductor domain interfaces. We have investigated the effects of local morphology on interfacial electronic structure using the model system of pentacene grown on Si(111). Spatially resolved two photon photoemission spectroscopy was used to map local variations in interfacial dipole formation and intraband state densities. These results are correlated with film topography as measured by AFM and bulk surface character as measured by conventional UPS. Findings are discussed in the framework of their implications on charge transfer dynamics and successful OPV development.",

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AU - Blumenfeld, Michael L.

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AU - Tackett, Brandon S.

AU - Monti, Oliver L.A.

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N2 - Organic photovoltaic (OPV) devices offer a promising route to low-cost solar energy harvesting. These systems have demonstrated heterogeneous ultrafast charge transfer dynamics in part due to complex micro and nanoscale disorder at semiconductor domain interfaces. We have investigated the effects of local morphology on interfacial electronic structure using the model system of pentacene grown on Si(111). Spatially resolved two photon photoemission spectroscopy was used to map local variations in interfacial dipole formation and intraband state densities. These results are correlated with film topography as measured by AFM and bulk surface character as measured by conventional UPS. Findings are discussed in the framework of their implications on charge transfer dynamics and successful OPV development.

AB - Organic photovoltaic (OPV) devices offer a promising route to low-cost solar energy harvesting. These systems have demonstrated heterogeneous ultrafast charge transfer dynamics in part due to complex micro and nanoscale disorder at semiconductor domain interfaces. We have investigated the effects of local morphology on interfacial electronic structure using the model system of pentacene grown on Si(111). Spatially resolved two photon photoemission spectroscopy was used to map local variations in interfacial dipole formation and intraband state densities. These results are correlated with film topography as measured by AFM and bulk surface character as measured by conventional UPS. Findings are discussed in the framework of their implications on charge transfer dynamics and successful OPV development.

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