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Micro Flowers of SrS/Bi2S3 Nanocomposite and Its Field Emission Properties.

Authors :: Gunjal, Aarti R.
Chothe, Ujjwala P.
Sethi, Yogesh A.
Panmand, Rajendra P.
Ambekar, Jalinder D.
Kulkarni, Milind V.
More, Mahendra A.
Kale, Bharat B.
Source :: Journal of Composites Science; Dec2019, Vol. 3 Issue 4, p1-14, 12p
Publication Year :: 2019
Abstract: The three-dimensional hierarchical SrS/Bi<subscript>2</subscript>S<subscript>3</subscript> heterostructures were synthesized by a template-free single-step hydrothermal method. The structural and morphological studies revealed the formation of a single crystalline orthorhombic heterostructure with rod-like morphologies possessing a high aspect ratio. The field emission properties of SrS/Bi<subscript>2</subscript>S<subscript>3</subscript> nanorods were investigated. J-E and the Fowler-Nordheim (F-N) plot, as well as long-term field emission (FE) stability, were studied. SrS/Bi<subscript>2</subscript>S<subscript>3</subscript> nanoflowers have enhanced the FE properties more than the virgin Bi<subscript>2</subscript>S<subscript>3</subscript>. The observed values of the re-producible turn-on field for SrS/Bi<subscript>2</subscript>S<subscript>3</subscript> defined to draw an emission current density of ca. 1 μA/cm² were found to be ca. 2.50 V/μm, and of the threshold field to draw a current density of ca. 10 μA/cm² were found to be ca. 3.00 V/μm (without visible light illumination). A maximum emission current density of ca. 527 μA/cm² was drawn without light and a current density of ca. 1078 μA/cm² with light, which is higher than that of pristine Bi<subscript>2</subscript>S<subscript>3</subscript>. [ABSTRACT FROM AUTHOR]