Structural, morphological, optical and low temperature magnetic studies on SnSeO3/ZnSeO3 nanocomposite

Abstract

Nanocomposite SnSeO3/ZnSeO3 has been synthesized by hydrothermal method. EDAX and XRD confirm the perfect formation of SnSeO3/ZnSeO3 nano composite. It shows an interesting morphology of rectangular bar. Particle size is determined as 137.3nm. It is an effective applicant for applications in optoelectronic field. The energy gap of SnSeO3/ZnSeO3 nanocomposite is 5.52 eV. Urbach energy value obtained is 0.0635 eV. Refractive index obtained from optical energy gap is 1.926. PL emission spectrum obtains a strong efficient emission in UV (~387.7 nm) region, weak emission in green (~520.7 nm) region, and moderate emission in red (~788.7 nm) region. The UV emission at 387.7 nm shows radiative electron-hole recombination and it makes the candidate suitable for display applications. The emission peaks in the visible range may be attributed to different surface imperfections of Schottky and Frenkel kinds, oxygen vacancies and Sn – interstitials or Zn -interstitials. The FTIR bands are well assigned and confirms Se-O, ZnO, Sn-O bonds in finger print region. The sample exhibits diamagnetic nature at 300K and 5K. It also exhibits interesting super paramagnetic nature at 5K between -0.15Tesla to 0.15Tesla.