File Name : fig. s1.tiff

Caption : <b>fig. s1</b> sem image of the cross-sectional morphology of the synthesized zn-doped sb<sub>2</sub>te<sub>3</sub> samples.

File Name : fig s2.tif

Caption : <b>fig. s2</b> (a) the structure of f-teg; (b) the schematic photo of the home-made measurement furniture.