Growth, structure and photoluminescence properties of SnO2-ZnO (TZO) micro cubes

National Conference on Processing and Characterization of Materials

Samal, S.^1 ; Panda, A.B.^2 ; Acharya, B.S.^2

Department of Materials Science, Indian Institute of Technology, Kanpur

208016, India^1

Department of Physics, CVRCE, Bidyanagar, Bhubaneswar

752054, India^2

关键词: Emission bands;    Excitation bands;    nano cubes;    Photoluminescence properties;    Shape and size;    Shaped particles;    Structural investigation;    Tin-zinc oxides;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/178/1/012001/pdf
DOI  :  10.1088/1757-899X/178/1/012001

来源: IOP

【 摘 要 】

Structural investigation from X-ray diffraction patterns of TZO revealed the presence of SnO2(cassiterite), ZnO (wurtzite) and ZnSnO3and ZnSnO4phases. The optical absorption spectra recorded for these powders dispersed in ethanol show the nature of the composite nanopowders to be semiconducting one having an optical absorption band around 280nm. Electron microscopy confirms a change in shape and size of the particles with a change in Sn/Zn ratio. The amorphous nature increases while going from Sn/Zn ratio of 0.87 to 3.75 and cubes of size ∼ 2μm, rhombohedral and irregular shaped particles are also observed. The prepared tin zinc oxide samples (TZO) show excitation bands at 241, 287 and 351 nm and common emission bands at 448, 485, 462 and 531 nm for all excitation energies. The photoluminescence and other studies reveal the role played by composition in changing the shape.