Dresden 2011 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 8: Poster: Organic Semiconductors
CPP 8.16: Poster
Monday, March 14, 2011, 17:30–19:30, P2
Influence of different exciton blocking layers on device characteristics and solar cell degradation in a planar heterojunction DIP/C60 solar cell — •Christoph Schuhmair, Julia Wagner, Mark Gruber, Andreas Opitz, and Wolfgang Brütting — Institute of Physics, University of Augsburg, 86135 Augsburg, Germany
The application of exciton blocking layers (EBLs) in organic solar cells has become a well-established method to prevent exciton quenching at the acceptor/cathode interface. One of the most common exciton blocking materials is the organic semiconducting material bathocuproine (BCP), yet its precise working mechanism is not fully understood.
In this contribution we show the impact of two different EBLs (BCP and 1,4,5,8-Naphthalene-tetracarboxylic-dianhydride (NTCDA)) on the performance of planar heterojunction organic solar cells based on the donor diindenoperylene (DIP) and the fullerene C60 as acceptor. The studies cover the influence of the EBL thickness and its impact on device degradation. Moreover, it is shown how substrate heating during deposition of the donor material influences the growth morphology of the donor and subsequent layers leading to distinct differences in device degradation.