Energetics at Au top and bottom contacts on conjugated polymers

W. Osikowicz; M. P. De Jong; S. Braun; C. Tengstedt; M. Fahlman; W. R. Salaneck

doi:10.1063/1.2201627

Energetics at Au top and bottom contacts on conjugated polymers

W. Osikowicz^*
, M. P. De Jong
, S. Braun
, C. Tengstedt
, M. Fahlman
, W. R. Salaneck

^*Corresponding author for this work

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

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Abstract

Photoelectron spectroscopy was employed to examine the energetics, and therefore charge injection barriers, at top and bottom contact configurations of gold and conjugated polymers, i.e., polymer spin coated on gold and vapor-deposited gold on polymer interfaces. Very similar results are obtained for both ex situ (contaminated) and in situ (clean) prepared interfaces: a 0.7-0.8 eV decrease in the vacuum energy levels is consistently observed as compared to bare polycrystalline gold. These observations are explained by changes of the metal work function upon contacting either polymers or contaminants, associated with the reduction of the electron density tail that extends outside the metal surface.

Original language	English
Article number	193504
Journal	Applied physics letters
Volume	88
Issue number	19
DOIs	https://doi.org/10.1063/1.2201627
Publication status	Published - 2006
Externally published	Yes

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title = "Energetics at Au top and bottom contacts on conjugated polymers",

abstract = "Photoelectron spectroscopy was employed to examine the energetics, and therefore charge injection barriers, at top and bottom contact configurations of gold and conjugated polymers, i.e., polymer spin coated on gold and vapor-deposited gold on polymer interfaces. Very similar results are obtained for both ex situ (contaminated) and in situ (clean) prepared interfaces: a 0.7-0.8 eV decrease in the vacuum energy levels is consistently observed as compared to bare polycrystalline gold. These observations are explained by changes of the metal work function upon contacting either polymers or contaminants, associated with the reduction of the electron density tail that extends outside the metal surface.",

author = "W. Osikowicz and \{De Jong\}, \{M. P.\} and S. Braun and C. Tengstedt and M. Fahlman and Salaneck, \{W. R.\}",

note = "Funding Information: This work was carried out within the EU Integrated Project NAIMO (No. NMP4-CT-2004-500355). The authors gratefully acknowledge Cambridge Display Technology, CDT, (Cambridge, UK), Merck Chemicals (Southampton, UK), and Covion Organic Semiconductors GmbH (Frankfurt, Germany) for supplying the polymer materials. The long collaboration with Andrew B. Holmes and the Synthetic Organic Chemistry Group, Cambridge, UK, is highly appreciated. In general, however, research in Link{\"o}ping is supported by the Center for Advanced Molecular Materials, CAMM, funded by the Swedish Foundation for Strategic Research, SSF, and the Swedish Research Council (VR).",

year = "2006",

doi = "10.1063/1.2201627",

language = "English",

volume = "88",

journal = "Applied physics letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

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T1 - Energetics at Au top and bottom contacts on conjugated polymers

AU - Osikowicz, W.

AU - De Jong, M. P.

AU - Braun, S.

AU - Tengstedt, C.

AU - Fahlman, M.

AU - Salaneck, W. R.

N1 - Funding Information: This work was carried out within the EU Integrated Project NAIMO (No. NMP4-CT-2004-500355). The authors gratefully acknowledge Cambridge Display Technology, CDT, (Cambridge, UK), Merck Chemicals (Southampton, UK), and Covion Organic Semiconductors GmbH (Frankfurt, Germany) for supplying the polymer materials. The long collaboration with Andrew B. Holmes and the Synthetic Organic Chemistry Group, Cambridge, UK, is highly appreciated. In general, however, research in Linköping is supported by the Center for Advanced Molecular Materials, CAMM, funded by the Swedish Foundation for Strategic Research, SSF, and the Swedish Research Council (VR).

PY - 2006

Y1 - 2006

N2 - Photoelectron spectroscopy was employed to examine the energetics, and therefore charge injection barriers, at top and bottom contact configurations of gold and conjugated polymers, i.e., polymer spin coated on gold and vapor-deposited gold on polymer interfaces. Very similar results are obtained for both ex situ (contaminated) and in situ (clean) prepared interfaces: a 0.7-0.8 eV decrease in the vacuum energy levels is consistently observed as compared to bare polycrystalline gold. These observations are explained by changes of the metal work function upon contacting either polymers or contaminants, associated with the reduction of the electron density tail that extends outside the metal surface.

AB - Photoelectron spectroscopy was employed to examine the energetics, and therefore charge injection barriers, at top and bottom contact configurations of gold and conjugated polymers, i.e., polymer spin coated on gold and vapor-deposited gold on polymer interfaces. Very similar results are obtained for both ex situ (contaminated) and in situ (clean) prepared interfaces: a 0.7-0.8 eV decrease in the vacuum energy levels is consistently observed as compared to bare polycrystalline gold. These observations are explained by changes of the metal work function upon contacting either polymers or contaminants, associated with the reduction of the electron density tail that extends outside the metal surface.

UR - https://www.scopus.com/pages/publications/33646766121

U2 - 10.1063/1.2201627

DO - 10.1063/1.2201627

M3 - Article

AN - SCOPUS:33646766121

SN - 0003-6951

VL - 88

JO - Applied physics letters

JF - Applied physics letters

IS - 19

M1 - 193504

ER -

Energetics at Au top and bottom contacts on conjugated polymers

Abstract

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