CINE Webinars 2021: "Strategies for Efficient Inverted ...", by Dr. Yana Vaynzof, TU Dresden

CINE Webinars 2021: "Strategies for Efficient Inverted Architecture Perovskite Solar Cells", by Dr. Yana Vaynzof, TU Dresden

In recent years, remarkable progress has been made in the field of solution-processed perovskite solar cells, resulting in power conversion efficiencies (PCE) of 25%. These high efficiencies are demonstrated for devices in a standard architecture, in which a perovskite layer is deposited on top of an electron transport layer (ETL) and capped with a hole transport layer (HTL). Despite significant interest in the development of inverted architecture solar cells, in which the order of extraction layers is reversed, their efficiency remains below that of devices made in the standard structure. In this talk, I will introduce three strategies for the fabrication of efficient perovskite solar cells in an inverted architecture. First, I will describe how controlling the rate of antisolvent deposition allows for the fabrication of efficient perovskite solar cells from any antisolvent.[1] Next, I will show that changing the antisolvent deposition method increases the device performance by better preserving the intended perovskite stoichiometry.[2] Finally, I will present a novel dual modification approach that simultaneously increases all the device photovoltaic parameters, leading to a maximum power conversion efficiency of 23.7%.[3]
[1] “A General Approach to High Efficiency Perovskite Solar Cells by Any Antisolvent”, A. D Taylor, Q. Sun, K. P. Goetz, Q. An, T. Schramm, Y. Hofstetter, M. Litterst, F. Paulus, Y. Vaynzof, Nature Communications, 12, 1878 (2021).
[2] “Preserving the Stoichiometry of Triple-Cation Perovskites by Carrier-Gas-Free Antisolvent Spraying”, O. Telschow, M. Albaladejo-Siguan, L. Merten, A. D. Taylor, K. P. Goetz, T. Schramm, O. V. Konovalov, M. Jankowski, A. Hinderhofer, F. Paulus, F. Schreiber and Y. Vaynzof, submitted.
[3] 23.7% Efficient Inverted Perovskite Solar Cells by Dual Interfacial Modification, M. Degani, Q. An, M. Albaladejo‐Siguan, Y. J. Hofstetter, C. Cho, F. Paulus, G. Grancini and Y. Vaynzof, Science Advances, in press (2021).

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