Publication date: 15th December 2025
Metal halide perovskites have emerged as promising semiconductors that combine excellent optoelectronic properties with the advantage of low-cost and easy solution-based processing. However, most commonly used deposition methods still rely on hazardous solvents, such as N,N-Dimethylformamide (DMF), and on wasteful laboratory-scale coating techniques like spin coating, hindering broader commercialization.
In this work we employ mechanochemistry as a solvent-free synthesis route that enables efficient material conversion, easy scalability, and precise stochiometric control for the preparation of halide perovskites. The resulting mechanochemically derived powders are then used to formulate dispersion inks in green solvents, which are subsequently processed into films via one-step slot-die coating.
We first investigate methylammonium lead halides (MAPbX3) as a case study. By monitoring the in-situ temperature during perovskite formation, we optimize the milling conditions and demonstrate the fabrication of efficient slot die coated detectors operating under both visible and X-ray radiation with a sensitivity of 600 μC/Gyꞏcm2.[1] We then extend this approach to a broad range of lead-free perovskite compositions, including double perovskite Cs2AgBiBr6 and various Sn-based materials.
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