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Leupold, Nico ; Nägele, Dominik ; Lukas, Daniel ; Biberger, Simon ; Panzer, Fabian ; Moos, Ralf:
Powder aerosol deposition of lead halide perovskites for optoelectronic applications.
2022
Veranstaltung: Keramik 2022 : 97. DKG-Jahrestagung
, 07.03.-09.03.2022
, online.
(Veranstaltungsbeitrag: Kongress/Konferenz/Symposium/Tagung
,
Vortrag
)
Abstract
Lead halide perovskites have gained much attention in recent years due to their remarkable optoelectronic properties. This resulted in highly efficient optoelectronic devices such as solar cells, X-ray detectors, or LEDs. Typically, lead halide perovskites are processed from solution, where after coating of a precursor solution, the perovskite forms in the course of solvent evaporation, simultaneously forming the final film. Thus, perovskite synthesis and film formation are inevitably coupled. Here, we explore an alternative processing approach using typical ceramics technology, where in contrast to solution-based processing the perovskite synthesis and its film formation are decoupled. In a first step, we mechanochemically synthesize perovskite powder with good optoelectronic properties and high stability, which we use in a second step to produce thin films at room temperature using the dry powder aerosol deposition(PAD)method. We demonstrate the successful processing of the perovskite powder into thin and dense layers with low surface roughness as it is necessary for the fabrication of efficient solar cells. We characterize the electrical, structural and optical properties of the PAD-processed films and evaluate the effect of a post-processing thermal treatment on the PAD film properties.