张猛   

张猛,副教授,硕士生导师,“泰山学者”团队核心成员。江苏省“科技副总”、青岛市十二届青年科技奖、青岛科技大学“科研新秀”、中国晶体学会会员、材料研究学会专业会员、中国化工学会高级会员、全国材料与器件科学家智库磁性材料与器件专家委员会常务委员、中国仪器仪表学会仪表功能材料分会电子元器件关键材料与技术专业委员会委员、国家自然科学基金/山东省自然科学基金/青岛市高新技术企业评审专家、SCI期刊《Frontiers ...Detials

Preparation, superior field emission properties and first principles calculation of electronic structure of SiC nanowire arrays on Si substrate

Release time:2023-10-19  Hits:

  • Key Words:LOW TURN-ON; CARBON-FIBERS; GROWTH; TEMPERATURE; NANOSTRUCTURES; FABRICATION; NANOARRAYS; MORPHOLOGY; STABILITY; RAMAN
  • Abstract:It is a crucial item to develop an available, efficient and stable cathode material for the application of flat-panel display, vacuum micro-electronic device, electron source and related area/equipment. In this work, oriented single-crystalline SiC nanowires (SiCNW) arrays were successfully fabricated onto the Si (100) substrate according to an easy Ni-catalyst-assisted chemical vapor deposition (CVD) process. The systematical characterization results suggested that product growth was modulated via the vapor-liquid-solid (VLS) mechanism. As the promising member in the candidate cathodes, SiCNW arrays with superior current emission stability (similar to +/- 6.1%) displayed decreased turn-on field (1.26 V/mu m) along with threshold field (1.83 V/mu m) at the optimal spacing between anode and cathode (about 500 mu m), suggesting their great application potential as field emitters in the future. The positive effect of the stacking faults on the electronic structure and field emission (FE) properties were investigated through first principles calculation using Vienna ab initio Simulation package (VASP) of density functional theory (DFT). Furthermore, a reasonable synergetic electronic transmission mechanism based on peculiar morphology and electronic band structure was proposed to explain the superior field emission performances.
  • Volume:180
  • Issue:wu
  • Translation or Not:no