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School of Engineering

Fabrication of perovskite-based multifunctional devices

Metal halide perovskites, with the formula ABX₃, are known for their exceptional optoelectronic properties, making them highly promising for a wide range of applications, including solar cells, photodetectors, memristors, etc. In our lab, we can easily fabricate these perovskite-based multifunctional devices with different architectures through solution-processing.

Generally, the fabrication process involves preparing precursor solutions, cleaning FTO/ITO substrates, depositing transporting layers and perovskite layer onto the substrate via spin coating, and finally evaporating metal electrode. The equipment available in our OEPHO fabrication lab and used in this process mainly includes a sonicator, a furnace (can reach 500 degrees Celsius), a UV Ozone, a glovebox with an inert atmosphere (Nitrogen), a balance, a magnetic stirrer, a spin coater, a hot plate, and a thermal evaporator inside the glovebox. In addition, multicolored perovskite phosphors can also be synthesized using a furnace with a controllable cooling rate.

Structural characterization of the materials and films is done in collaboration, for XRD with colleagues at our neigboring institute IMPE at ZHAW. Electron microscopy is done at the electron microscopy center at ETH, ScopeM.