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Investigation of Local Dynamics on the Sub-micron Scale in Organic Blends Using an Ultrafast Confocal Microscope

Published online by Cambridge University Press:  01 February 2011

Giulia Grancini
Affiliation:
giulia.grancini@mail.polimi.it, Politecnico di Milano, Physics, Milano, Italy
Dario Polli
Affiliation:
dario.polli@polimi.it, Politecnico di Milano, Physics, Milano, Italy
Jenny Clark
Affiliation:
jc414@cam.ac.uk, Politecnico di Milano, Physics, Milano, Italy
Tersilla Virgili
Affiliation:
tersilla.virgili@polimi.it, IFN CNR Politecnico di Milano, Milano, Italy
Giulio Cerullo
Affiliation:
giulio.cerullo@fisi.polimi.it, Politecnico di Milano, Physics, Milano, Italy
Guglielmo Lanzani
Affiliation:
guglielmo.lanzani@iit.it, CNST of IIT@POLIMI, Milano, Italy
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Abstract

We introduce a novel instrument combining femtosecond pump-probe spectroscopy and confocal microscopy for spatio-temporal imaging of excited-state dynamics of phase-separated polymer blends. Phenomena occurring at interfaces between different materials are crucial for optimizing the device performances, but are poorly understood due to the variety of possible electronic states and processes involved and to their complicated dynamics. Our instrument (with 200-fs temporal resolution and 300-nm spatial resolution) provides new insights into the properties of polymer blends, revealing spatially variable photo-relaxation paths and dynamics and highlighting a peculiar behaviour at the interface between the phase-separated domains.

Type
Research Article
Copyright
Copyright © Materials Research Society 2010

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References

REFERENCES

1 Lanzani, G., Cerullo, G., Polli, D., Gambetta, A., Zavelani-Rossi, M., Gadermaier, C., Phys. Stat. Sol. (a) 201, 1116 (2004).Google Scholar
2 Virgili, T., Marinotto, D., Manzoni, C., Cerullo, G. and Lanzani, G., Phys. Rev. Lett. 94, 117402 (2005).CrossRefGoogle Scholar
3 Chappell, J. and Lidzey, D. G., J. Microsc. 209, 188193 (2003).CrossRefGoogle Scholar
4 Ohkita, H. et al., J.Am. Chem. Soc. 130, 3030 (2008).CrossRefGoogle Scholar
5 Korovyanko, O. J., Oesterbacka, R., Jiang, X. M., Vardeny, Z. V., Phys. Rev. B 64, 235122 (2001).CrossRefGoogle Scholar

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Investigation of Local Dynamics on the Sub-micron Scale in Organic Blends Using an Ultrafast Confocal Microscope
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