Improved field electron emissionbehaviour of Ag nanoparticles supported Bi2S3 nanowires.

Heterostructures exhibits unique set of properties as compared to their pristine counterparts. In the present study, Ag-Bi₂S₃ heterostructure were synthesized using modified composite molten salt method and field electron emission behavior was investigated. The synthesized heterostructure was characterized using X-ray diffraction, scanning electron microscope to analyze structural and morphological aspect. The FE behavior of as-synthesized heterostructure carried out planer diode configuration. The values of turn-on and threshold fields, required to draw an emission current density ∼1 µA/cm² are found to be ∼1.70 V/µm, for anode-cathode separation of ∼2 mm. The maximum emission current density of ∼143.12 µA/cm2 has been drawn from the emitter at an applied electric field of ∼3.33 V/µm. The emission current stability recorded at the pre-set value of ∼1 µA over the period of more than 3 hr with fairly stable emission having fewer fluctuations. The observed results of field emission behavior of Ag-Bi₂S₃ heterostructure hold the promise for the application in vacuum micro/nanoelectronic devices. [ABSTRACT FROM AUTHOR]