Regensburg 2022 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 12: Poster 1
CPP 12.51: Poster
Montag, 5. September 2022, 18:00–20:00, P1
Charge Carrier Properties of Cs2AgBiBr6 in Thin Films for Perovskite Solar Cells — •Tim P. Schneider, Jonas Horn, and Derck Schlettwein — Justus-Liebig-Universität Gießen, Institut für Angewandte Physik
The double perovskite Cs2AgBiBr6 is regarded as a potential candidate to replace the toxic lead perovskites currently used in perovskite solar cells and can potentially be used for photo- and x-ray detection. For any such technical application the electrical properties of the double perovskite play an important role. Therefore, the charge transport in Cs2AgBiBr6 was systematically studied in different sample geometries. Thin films were prepared onto micro-structured interdigitated metal electrode arrays as well as sandwiched between different electron-conducting or hole-conducting layers that are often used in perovskite solar cells, to achieve single-carrier-devices. Aside from estimates of the conductivity and a discussion of possible trapping of charge carriers, the obtained current-voltage characteristics yielded insights into contact formation, hysteresis and intrinsic ion migration. Further, atomic force microscopy showed a strong influence of the underlying substrate on the morphology of the Cs2AgBiBr6 thin films.