Повышение фотовольтаической эффективности перовскитных солнечных элементов с добавкой хлорида метиламмония

<jats:p>In mixed-cation perovskite solar cells, non-radiative recombination at grain boundaries significantly limits the power conversion efficiency. The addition of methylammonium chloride (MACl) into the perovskite precursor solution optimizes the crystallization kinetics and film morphology. Scanning electron microscopy analysis shows that MACl treatment increases the average grain size of the perovskite film from 150–250 nm to 350–500 nm, forming a pinholefree film. Photoluminescence spectroscopy confirms a reduction in non-radiative recombination, providing a 1.8-fold enhancement in PL intensity while maintaining the bandgap. As a result, the short-circuit current density increases from 19.6 to 22.8 mA cm⁻², the fill factor improves from 45 to 72%, and the power conversion efficiency significantly increases from 9.2 to 17.2%.</jats:p>