Relationship between Crystal Shape, Photoluminescence, and Local Structure in SrTiO₃ Synthesized by Microwave‐Assisted Hydrothermal Method

Abstract

This paper describes the effect of using different titanium precursors on the synthesis and physical properties of SrTiO 3 powders obtained by microwave‐assisted hydrothermal method. X‐ray diffraction measurements, X‐ray absorption near‐edge structure (XANES) spectroscopy, field emission scanning electron microscopy (FE‐SEM), and high‐resolution transmission electron microscopy (HRTEM) were carried out to investigate the structural and optical properties of the SrTiO 3 spherical and cubelike‐shaped particles. The appropriate choice of the titanium precursor allowed the control of morphological and photoluminescence (PL) properties of SrTiO 3 compound. The PL emission was more intense in SrTiO 3 samples composed of spherelike particles. This behavior was attributed to the existence of a lower amount of defects due to the uniformity of the spherical particles.