Work

Mechanosynthesis of Metal‐Free Molecular Perovskites

Year: 2026

Type: article

Abstract: ABSTRACT 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)(NH 4 )X 3 (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.

Source: Helvetica Chimica Acta

DOI: 10.1002/hlca.202500237