Mechanosynthesis of Metal‐Free Molecular Perovskites;
: Bravetti, Gianluca; Frankberg, Aki; Shahsavan, Mahsa; Zimmermann, Paul; Gallant, Benjamin M.; Konovalov, Oleg; Golobostanfard, Mohammad Reza; Hinderhofer, Alexander; Schreiber, Frank; Kubicki, Dominik J.; Milić, Jovana V.
Publisher: Wiley
: 2026
Helvetica Chimica Acta
: e00237
: 0018-019X
: 1522-2675
DOI: https://doi.org/10.1002/hlca.202500237
: https://doi.org/10.1002/hlca.202500237
: https://research.utu.fi/converis/portal/detail/Publication/526591940
Metal-free halide perovskites have recently emerged as promising candidates for optoelectronic applications. However, their synthesis has largely depended on water-based single-crystal growth that limits material diversity, scalability, and practical implementation. Here, we present a mechanochemical route to synthesize N,N-diazabicyclo[2.2.2]octonium (H-DABCO)-based halide perovskites from the (DABCO)(NH4)X3 (X = I, Br) compositions. The structural properties were confirmed by X-ray diffraction and solid-state nuclear magnetic resonance spectroscopy. Thin films were prepared from mechanosynthetic powders by spin-coating and characterized by in-situ grazing incidence wide-angle scattering measurements, as well as by UV–vis absorption and steady-state photoluminescence spectroscopy. This mechanosynthetic strategy provides a scalable, environmentally friendly pathway to broaden the scope of metal-free perovskites and advance their potential in sustainable optoelectronic technologies.
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G.B. and J.V.M. are grateful to the Swiss National Science Foundation (SPARK project no. 221017) for supporting the early early work on this project. The authors received funding from the European Research Council Horizon programme for innovation under the grant agreement no. 101114653 (project “SmartHyMat”), and they acknowledge the European Synchrotron Radiation Facility (ESRF) for providing synchrotron radiation facilities under proposal number SC-5693, ID10 beamline, as well as the support of Ivan Zaluzhnyy and Niels Scheffczyk during the Beamtime. We also thank the BMBF for supporting project 05K19VTA (ERUM-PRO). Open access publishing facilitated by Turun yliopisto, as part of the Wiley - FinELib agreement.
