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Determination of the Acoustic Impedance Ratio for the Thermal Co-evaporation of Metal-halide Perovskites

19. April 2021 | Verfasser: KJLC Innovate

*Photo: ISFH, taken by Salzmann-Fotografie*

The Kurt J Lesker Company has been shipping Physical Vapor Deposition (PVD) tools into the field of perovskite solar cells for the last decade and continues to support researchers in this exciting application. Our partner, Dr. Sascha J. Wolter, along with the Future Technologies Photovoltaics group, headed by Dr. Sarah Kajari-Schröder, at the Institute for Solar Energy Research (ISFH) in Hamelin, Germany, have presented a method to determine the acoustic impedance ratio (Z) for two perovskite precursors that are commonly co-deposited using PVD. In their paper "Determination and influence evaluation of the acoustic impedance ratio for thermal evaporation"[1] they report Z values for methylammonium iodide (MAI) of 0,025 ±0,002 and 0,11 ±0,01 for lead (II) iodide (PbI2). Furthermore, the impact of using an incorrect Z-ratio on actual experimental thermal evaporations is investigated.

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