Investigations of optoelectronic properties in DMS SnO2 nanoparticles

• The room temperature ferromagnetism has been observed in SnO2 nanoparticles.
• The band gap shows a blue shift with increasing calcinations temperature.
• The particle size and shape changes after calcination at different temperatures.

The structural, optical and magnetic properties of SnO2 nanoparticles synthesized by co-precipitation technique at different calcination temperatures have been investigated. The calcination affects the luminescence and morphological properties of SnO2 nanoparticles. The defects and vacancies formed during synthesis processes which are responsible for photoluminescence and magnetic properties in SnO2 nanoparticles. The band gap shows a blue shift with increasing calcination temperature but shows a red shift compared to bulk SnO2. The calcination temperature affects the particle shape and size of the synthesized samples. The room temperature ferromagnetism has been observed which indicates SnO2 behave like a dilute magnetic semiconductor material (DMS). The photoluminescence (PL) emission spectra show the blue and green emissions at different calcination temperatures.

M–H curve of SnO2 nanoparticles calcinated at 400 °C and 600 °C.Figure optionsDownload as PowerPoint slide