Dresden 2017 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 28: Poster: Fundamentals of Perovskite Photovoltaics (joint session CPP, DS, HL)
HL 28.16: Poster
Montag, 20. März 2017, 18:30–21:00, P1A
Investigation of planar perovskite solar cells by means of electrical impedance spectroscopy — •Markus Jakob1, David Kiermasch1, Mathias Fischer1, Phillip Rieder1, Andreas Baumann2, and Vladimir Dyakonov1,2 — 1Experimental Physics VI, Julius Maximilian University of Würzburg, 97074 Würzburg — 2Bavarian Center for Applied Energy Research (ZAE Bayern) Bayern, 97074 Würzburg
Hybrid organic-inorganic perovskites have been recognized as a promising material for photovoltaic devices and became a hotspot in this research field over the last years. Toward the common goal of developing more efficient and stable devices better insight into the working principles is required. The interface between the crystalline perovskite and the charge selective layer has been found to be a crucial factor for the solar cell device performance. An accumulation of charged particles, either charge carriers or ions at the interface may lead to extraction barriers leading to a decrease in the overall efficiency. We investigate highly efficient solution processed perovskite solar cells in planar configuration by means of electrical impedance spectroscopy. The cells are fabricated with the well-known two step interdiffusion method using PbI2 and CH3NH3I. We discuss our results for different device configurations and transport materials to identify their impact on the dielectric properties.