Premium
Controlled Hetero‐Architectures of Au‐Nanoparticles‐Decorated ZnO Nanowires for Enhanced Field Electron Emission Displays
Author(s) -
Chikate Parameshwar R.,
Daware Krishna D.,
Gavhane Dnyaneshwar S.,
Ma YuanRon,
Choudhary Ram J.,
Patil Shankar I.,
More Mahendra A.,
Phase Deodatta M.,
Gosavi Suresh W.,
Shirage Parasharam M.,
Devan Rupesh S.
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201801282
Subject(s) - materials science , field electron emission , nanowire , nanoparticle , heterojunction , current density , nanotechnology , doping , nanostructure , electron , optoelectronics , chemical engineering , physics , quantum mechanics , engineering
The spitzer shaped pointed ZnO nanowires of diameter 120 nm and length ∼5‐6 μm synthesized via hydrothermal techniques were decorated with Au nanoparticles of diameter < 20 nm along their textural boundaries. The turn‐on field ( E on ) of 1.56 V/μm required to draw current density of 10 μA/cm 2 from ZnO nanowires was reduced further to 0.96 V/μm after controlled decoration of Au nanoparticle, is significantly lower than pristine/doped ZnO nanostructures, Ag@ZnO, Au@ZnO, Au@CuO, and MoS 2 @TiO 2 heterostructure based field emission (FE) devices. The orthodoxy test confirmed the feasibility of field‐enhancement factor ( β FE ) of 4477 for Au/ZnO/ITO emitters. The enhanced FE behavior are attributed to pointed nanotips, individual dispersion of Au nanoparticles along the textural boundaries of ZnO nanowires, and enhanced energy well formation at their interface. Moreover, the density of state increases enormously due to the hetero‐structured interface of Au@ZnO and a significant amount of electrons from both Au and ZnO contribute for enhanced emission current density (2.1 mA/cm 2 @ 1.92 V/μm), and greatly stable electron emission. Our experiments suggest that the tunable hetero‐architectures of Au nanoparticles@ZnO nanowires hold the promises for applications in display screens and intense electron source.