Abstract
Tetrapod Ag3PO4 was synthesized by a simple hydrothermal method, and ultraviolet lamp irradiation was used to precipitate Ag on the surface of Ag3PO4 to form Ag/Ag3PO4 metal-semiconductor structure. The field emission performance of Ag/Ag3PO4 composite was studied. Compared with pureAg3PO4, precipitated Ag changed the morphology of the surface of Ag3PO4, effectively reducing the field emission turn-on field from 5.9 Vμm-1 to 2.3 Vμm-1, and the field enhancement factor was increased from 1012 to 1923. After Ag3PO4 was wrapped by Ag nanoparticles, the formed metal-semiconductor structure produced ohmic contact, accelerating the transfer of electrons on the interface and enhancing the field emission performance. Ag nanoparticles protected Ag3PO4 from photodegradation, which effectively improved the stability of Ag3PO4 and the field emission enhancement mechanism was analyzed by the classical F-N theory.
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