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Connecting Scanning Tunneling Spectroscopy to Device Performance for Polymer: Fullerene Organic Solar Cells
Eindhoven University of Technology, Netherlands.
Eindhoven University of Technology, Netherlands.
Linköping University, Department of Physics, Chemistry and Biology, Chemical and Optical Sensor Systems. Linköping University, The Institute of Technology.ORCID iD: 0000-0002-7104-7127
2010 (English)In: ACS Nano, ISSN 1936-0851, E-ISSN 1936-086X, Vol. 4, no 3, 1385-1392 p.Article in journal (Refereed) Published
Abstract [en]

Scanning tunneling microscopy and spectroscopy have been used to measure the local photovoltaic performance of prototypical polymer:fullerene (MDMO-PPV:PCBM) bulk heterojunction films with similar to 10 nm resolution. Fullerene-rich clusters are found to act as sinks, extracting electrons from a shell layer of a homogeneously mixed polymer:fullerene matrix, surrounding the fullerene cluster. The experimental results were quantitatively modeled with a drift-diffusion model that in first order accounts for the specific morphology. The same model has subsequently been used to calculate performance indicators of macroscopic solar cells as a function of film composition and characteristic size of the phase separation. As such, a first step has been set toward a quantitative correlation between nanoscopic and macroscopic device photovoltaic performance.

Place, publisher, year, edition, pages
American Chemical Society , 2010. Vol. 4, no 3, 1385-1392 p.
Keyword [en]
organic solar cells; scanning tunneling; microscopy; morphology; device modeling
National Category
Physical Sciences
URN: urn:nbn:se:liu:diva-118176DOI: 10.1021/nn100039rISI: 000275858200018PubMedID: 20184387OAI: diva2:813522

Funding Agencies|NanoNed; Ministry of Economic Affairs

Available from: 2015-05-22 Created: 2015-05-22 Last updated: 2015-06-01

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Kemerink, Martijn
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