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Photoelectron spectroscopy study of the energy level alignment at polymer/electrode interfaces in light emitting devices
ACREO AB, Bredgatan 34, S-602 21, Norrköping, Sweden.
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Surface Physics and Chemistry .
2001 (English)In: Current applied physics, ISSN 1567-1739, Vol. 1, no 1, 98-106 p.Article in journal (Refereed) Published
Abstract [en]

The band alignment at the interface between electroluminescent polymers and the electrodes in polymer-LEDs was studied using photoelectron spectroscopy. Chemical factors like the formation of InCl3 during conversion of precursor-PPV on ITO could be directly monitored with XPS. Films of electroluminescent polymers were studied on a range of ITO and metal electrodes with different work functions, as well as with an intermediate, electrically conducting polymer layer, using UPS. Furthermore, the study of the band alignment at polymer electrode interfaces was extended to three-layer structures: the results confirm the common assumption that the potential drop over the polymer layer in polymer LEDs is equal to the difference between the electrode work functions. © 2001 Elsevier Science B.V.

Place, publisher, year, edition, pages
2001. Vol. 1, no 1, 98-106 p.
Keyword [en]
71.20, 71.20.R, 73.20, 73.61.P, 78.60.F, 79.60, 79.60.F, Band alignment, Electrode, Electroluminescence, Interface, ITO, LED, Photoelectron spectroscopy, Polymer
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-47489DOI: 10.1016/S1567-1739(00)00019-5OAI: diva2:268385
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2011-01-13

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Salaneck, William R
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