Ponente
Descripción
All inorganic halide 2D perovskites have emerged as promising alternatives to traditional 3D counterparts for improved environmental stability. In this work we report the synthesis of 2D perovskite Cs$_2$CdBr$_2$Cl$_2$ activated with Sb$^{3+}$, manufactured via the solvent evaporation method to ensure a high quality crystalline phase. The structural phase purity of the material is assessed through Raman spectroscopy and its photoluminescent behavior is investigated using excitation and emission spectra. Additionally, the experimental band gap is determined from diffuse reflectance spectroscopy. The results reveal that Cs$_2$CdBr$_2$Cl$_2$ exhibits a wide emission spectrum and a large Stokes shift, attributed to the formation of self-trapped excitons (STEs) due to the incorporation of Sb$^{3+}$. These findings demonstrate its potential for optoelectronic applications and its viability as a stable, lead free perovskite for future device integration.
