Regensburg 2010 – scientific programme

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DS: Fachverband Dünne Schichten

DS 17: [CPP] Organic Electronics and Photovoltaics II (Joint Session DS/CPP/HL/O)

DS 17.3: Talk

Tuesday, March 23, 2010, 14:15–14:30, H37

Charge Transfer Exciton Dynamics in Polymer/Fullerene Blend — •Josef M. Berger, Markus Hallermann, Enrico Da Como, and Jochen Feldmann — Lehrstuhl für Photonik und Optoelektronik, CeNS, LMU München

Polymer fullerene blends are one of the most promising material systems for organic photovoltaics. A major loss channel in these cells is the formation and recombination of charge transfer excitons. These excitons emit light as a consequence of radiative recombination of the hole on the polymer and the electron on the fullerene [1]. Here, we report on time resolved emission experiments with the aim of understanding the parameters controlling the recombination lifetime. For the blend of MDMO-PPV/PCBM we correlate the decay profile with the morphology obtained by transmission electron microscopy [2]. [1] Markus Hallermann, Stephan Haneder, and Enrico Da Como, Appl. Phys. Lett 93, 053307 (2008) [2] Markus Hallermann, Ilka Kriegel, Enrico Da Como, Josef M. Berger, Elizabeth von Hauff, Jochen Feldmann, Advanced Functional Materials 19, 3662 (2009)