Berlin 2012 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 6: Poster: Structural Ordering and Electronic Transport (joint focus with HL)
CPP 6.22: Poster
Montag, 26. März 2012, 17:30–19:30, Poster A
Determination of the mobility and lifetime of charge carriers in organic solar cells under operating conditions — •Andreas Baumann1, Jens Lorrmann2, Daniel Rauh1, Carsten Deibel2, and Vladimir Dyakonov1,2 — 1Bavarian Center for Applied Energy Research (ZAE Bayern), Am Hubland, D-97074 Würzburg, Germany — 2Experimental Physics VI, Physical Institute, Julius Maximilian University of Würzburg, Am Hubland, D-97074 Würzburg
The field of organic photovoltaics (OPV) is rapidly raising the last years with power conversion efficiency values exceeding 7%. For a better understanding of the performance and especially the limitations of these solar cells, it is, however, still essential to study the fundamental processes like the transport and the recombination dynamics of photogenerated charge carriers. A prominent experimental technique, which is more and more applied in the field of OPV, is the charge extraction technique CELIV studying both the mobility and lifetime of light induced charge carriers, simultaneously. However, there are several drawbacks, such as charge carrier injection causing large RC or inhomogeneous charge carrier profiles (non-steady-state conditions) resulted by the laser flash, which prevent a direct correlation to the solar cell working conditions. With our newly developed charge extraction technique OTRACE, it is now feasible to get new insights into the transport and the recombination dynamics in organic BHJ solar cells under operating conditions. Results are shown for the highly efficient solar cells of PTB7 and PCDTBT blended with [70]PCBM, whereas the I-V characteristics are correlated to the mobility and lifetime.