Structural and spectroscopic investigations of low dimensional halide perovskites

Alejandro Pedro Ayala

Departamento de Física, Universidade Federal do Ceará

ayala@fisica.ufc.br

The recent developments on hybrid organic-inorganic halide perovskites have evidenced their exceptional properties, including high mobility of charge carriers, high absorption coefficient in the visible region of the solar spectrum, long diffusion lengths and the simplicity of manufacturing. These properties made them exceptional and competitive optoelectronic materials for photovoltaic applications, light emitting diodes (LEDs), photodetectors, lasers, and more. The halide perovskites family includes several structures based on metal halide octahedra like those of the ABX₃ perovskite. These structures have been often classified considering the spatial arrangement of the [BX₆]^4- octahedra into four crystal structures: three-dimensional (corner-shared octahedra), two-dimensional (octahedra planes), one-dimensional (octahedra chains) and zero-dimensional (isolated octahedra). Low dimensional halide perovskites exhibit remarkable properties which are significantly different of the 3D conterpart. In this presentation, structural and spectroscopic investigations of 0D and 2D structures will be presented.