Binding energy of singlet excitons and charge transfer complexes in MDMO-PPV:PCBM solar cells

Julia Kern,

Corresponding Author

julia.kern@physik.uni-wuerzburg.de

Experimental Physics VI, Julius-Maximilians University of Würzburg, 97074 Würzburg, Germany

Phone: +49 931 31 80467, Fax: +49 931 31 83109Search for more papers by this author

Sebastian Schwab,

Experimental Physics VI, Julius-Maximilians University of Würzburg, 97074 Würzburg, Germany

Search for more papers by this author

Carsten Deibel,

Experimental Physics VI, Julius-Maximilians University of Würzburg, 97074 Würzburg, Germany

Search for more papers by this author

Vladimir Dyakonov,

Experimental Physics VI, Julius-Maximilians University of Würzburg, 97074 Würzburg, Germany

Bavarian Center for Applied Energy Research (ZAE Bayern), 97074 Würzburg, Germany

Search for more papers by this author

Julia Kern,

Corresponding Author

julia.kern@physik.uni-wuerzburg.de

Experimental Physics VI, Julius-Maximilians University of Würzburg, 97074 Würzburg, Germany

Phone: +49 931 31 80467, Fax: +49 931 31 83109Search for more papers by this author

Sebastian Schwab,

Experimental Physics VI, Julius-Maximilians University of Würzburg, 97074 Würzburg, Germany

Search for more papers by this author

Carsten Deibel,

Experimental Physics VI, Julius-Maximilians University of Würzburg, 97074 Würzburg, Germany

Search for more papers by this author

Vladimir Dyakonov,

Experimental Physics VI, Julius-Maximilians University of Würzburg, 97074 Würzburg, Germany

Bavarian Center for Applied Energy Research (ZAE Bayern), 97074 Würzburg, Germany

Search for more papers by this author

First published: 07 October 2011

https://doi.org/10.1002/pssr.201105430

Citations: 28

Abstract

The influence of an external electric field on the photoluminescence intensity of singlet excitons and charge transfer complexes is investigated for a poly[2-methoxy-5-(3′,7′-dimethyloctyloxy)-1,4-phenylenevinylene] (MDMO-PPV) diode and a bulk heterojunction of the PPV in combination with [6,6]-phenyl-C₆₁ butyric acid methylester (PCBM), respectively. The experimental data is related to the dissociation probability derived from the Onsager–Braun model. In this way, a lower limit for the singlet exciton binding energy of MDMO-PPV is determined as equation image meV, whereas a significantly lower value of meV is extracted for the charge transfer complex in a MDMO-PPV:PCBM blend. (© 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)