info:eu-repo/semantics/article
Mechano-Chemical Synthesis, Structural Features and Optical Gap of Hybrid CH3NH3CdBr3 Perovskite
Fecha
2021-10Registro en:
Alonso, José Antonio; Kayser, Paula; Hong, Bo Kyung; Álvarez Galván, María Consuelo; Fauth, Francois; et al.; Mechano-Chemical Synthesis, Structural Features and Optical Gap of Hybrid CH3NH3CdBr3 Perovskite; MDPI; Materials; 14; 20; 10-2021; 1-9
1996-1944
CONICET Digital
CONICET
Autor
Alonso, José Antonio
Kayser, Paula
Hong, Bo Kyung
Álvarez Galván, María Consuelo
Fauth, Francois
Lopez, Carlos Alberto
Resumen
Hybrid methyl-ammonium (MA:CH3 NH3+) lead halide MAPbX3 (X = halogen) perovskites exhibit an attractive optoelectronic performance that can be applied to the next generation of solar cells. To extend the field of interest of these hybrid materials, we describe the synthesis by a solvent-free ball-milling procedure, yielding a well crystallized, pure and moisture stable specimen of the Cd tribromide counterpart, MACdBr3, which contains chains of face-sharing CdBr6 octahedra in a framework defined in the Cmc21 (No 36) space group. The details of the structural arrangement at 295 K have been investigated by high angular resolution synchrotron x-ray diffraction (SXRD), including the orientation of the organic MA units, which are roughly aligned along the c direction, given the acentric nature of the space group. UV-vis spectra unveil a gap of 4.6 eV, which could be useful for ultraviolet detectors.