Regensburg 2016 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 21: Hybrid and Perovskite Photovoltaics II (joint session CPP/DF/DS/HL, organized by CPP)
CPP 21.3: Vortrag
Dienstag, 8. März 2016, 11:15–11:30, H37
Correlating charge carrier mobility, morphology and efficiency in hybrid halide perovskite photovoltaic devices — •Irene Grill1,2, Michiel Petrus1,2, Nadja Giesbrecht1,2, Thomas Bein1,2, Pablo Docampo1,2, Matthias Handloser1,2, and Achim Hartschuh1,2 — 1Department of Chemistry and CeNS, LMU Munich — 2Nanosystems Initiative Munich (NIM)
Hybrid perovskites currently represent one of the most promising material systems for incorporation in future solar cell devices since their efficiencies increased enormously in the last few years [1,2]. To date, fundamental physical properties including charge carrier dynamics and transport in these materials are not completely understood and are therefore at the focus of intense research.
Here we extract the mobility of charge carriers in working thin film solar cells based on perovskite absorber layers and correlate it to the efficiency of the respective devices. To this end we performed Time-of-flight (ToF) studies on different perovskite thin films serving as photoactive layers.
Further, in order to analyze the influence of contacts and other interfaces on charge transport and to identify possible optimization steps in the stacked architecture we carried out additional ToF measurements on each of the individual layers. Our results are discussed in terms of respective device efficiencies, morphologies and optical properties, allowing for a detailed investigation and identification of the limiting factors for the mobility and the efficiency in perovskite based thin film devices.
[1] M.A. Green and T. Bein, Nature Mater. 2015, 14, 559-561.
[2] N. Jeon et al., Nature 2015, 517, 476-480.