Publication date: 15th May 2026
Metal halide perovskites (MHPs) are mixed ionic-electronic semiconductors with outstanding optoelectronic properties.1 Their low-temperature solution processability, high radiative efficiency, tunable bandgaps, and defect tolerance make them attractive for applications ranging from light emission and lasing to sensing and memory devices2. However, their integration into practical device platforms requires robust strategies for controlled patterning and integration with functional contacts and device architectures.3 The development of patterning methods for MHPs remains challenging due to their intrinsic ionic nature and their sensitivity to the solvents used in standard lithography processes.
I will present our recent progress in developing a versatile top-down patterning method based on photolithography and reactive ion etching (RIE), which can be tuned to accommodate different perovskite compositions and morphologies.4 This process preserves the functional properties of the perovskite while enabling device-level integration and reproducible fabrication of micron-sized features down to 1 μm across different chips. I will discuss the implementation of these patterned MHPs in photonic devices, including lasing, as well as in perovskite-based memory devices with potential for neuromorphic computing.
For laser devices, a cesium lead bromide (CsPbBr3) perovskite laser was monolithically integrated on a silicon nitride waveguide platform with a first-order grating distributed-feedback (DFB) cavity. The device operated at 540 nm in the green spectral region, where III-V lasers have limitations, and exhibited a threshold of 0.755 mJ cm⁻2. For memory devices, patterned CsPbBr3 layers were integrated into vertical nickel (Ni)/CsPbBr3/aluminum (Al) memristors with a 50 μm × 50 μm active area, showing forming-free bipolar resistive switching, high ON/OFF ratios of approximately ~106–107, state retention of > 2×10⁵ s, and stable operation over extended ambient storage.
Overall, this talk will highlight how perovskite structuring can serve as an enabling strategy for different classes of devices at the interface of lighting and computing.
This project was funded by the Deutsche Forschungsgemeinschaft (DFG) within TRR 404 Active-3D (project number: 528378584) and the German Ministry of Education and Research (BMBF) through the project NEPOMUQ (13N17112). S.B.A. acknowledges the funding received from the Anusandhan National Research Foundation under the Prime Minister Early Career Grant (ANRF/ECRG/2024/002241/ENS).
nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.
Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.
International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.