Dresden 2014 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 19: Poster Session 1 (joint session with BP)

CPP 19.41: Poster

Dienstag, 1. April 2014, 09:30–13:00, P1

Exciton quenching in inverted bilayer all polymer solar cells — •Karl-Philipp Strunk, Thomas Pfadler, Mihael Coric, Jonas Weickert, and Lukas Schmidt-Mende — University of Konstanz

All polymer solar cells are a promising type of emerging solar cells. As the current generating layer consists only of polymers it offers a great versatility and a potential for low cost fabrication. Here we combine the n-type polymer N2200 (also called P(NDI2OD-T2)) with different hole conducting p-type polymers to bilayered solar cells.

Absorption measurements and data about the band structure give an idea about good matching polymer combinations. Three different electron donors, namely P3HT, MDMO-PPV and F8TBT, are investigated in depth as they show a favourable band structure and a complementary absorption to N2200. As P3HT is one of the most investigated p-type polymers, bulk heterojunction solar cells from N2200:P3HT are optimized by improving the fabrication parameters and compared with bilayer solar cells of N2200:P3HT, MDMO-PPV and F8TBT.

Quantitative studies of photoluminescence in bulk heterojunction and bilayers from all polymer combinations have been performed in order to calculate the exciton quenching rate. Quenching is strongest for the internal charge transfer (CT) state in N2200 which is an indication for a high diffusion length of the internal CT state.