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

Temperature-controlled synthesis, thermodynamics and field emission properties of &beta;-SiC/SiO<inf>2</inf>coaxial heterojunction emitters

Release time:2023-10-19  Hits:

  • Key Words:Chemical vapor deposition;Electron emission - Field emission - Field emission cathodes - Heterojunctions - Silicon carbide - Temperature - Thermodynamics;Chemical compositions - Chemical vapor depositions (CVD) - Field emission property - Field-emission behavior - Heterojunction emitters - Reaction thermodynamics - Synthesis temperatures - Temperature-controlled synthesis
  • Abstract:&beta;-SiC/SiO<inf>2</inf>coaxial heterogeneous emitters composed of a SiC nanowire core and a uniform amorphous SiO<inf>2</inf>coating have been fabricated via the chemical vapor deposition (CVD) technique. The effect of synthesis temperature on the yield, microstructure, and chemical composition of the products was systematically analysed. A rational explanation for the growth of the &beta;-SiC/SiO<inf>2</inf>emitter was proposed and analysed from the perspective of the reaction thermodynamics. The field emission behaviors of the &beta;-SiC/SiO<inf>2</inf>coaxial nanocables exhibit a strong dependence on the synthesis temperatures. Excellent performances with a low turn-on field (E<inf>to</inf>) of 0.63 V &mu;m<sup>-1</sup>and threshold field (E<inf>th</inf>) of 1.92 V &mu;m<sup>-1</sup>have been recorded at 1200 &deg;C. Furthermore, the optimized cathode shows remarkable electron emission stability with the fluctuation of the current density being less than 5.7% after a 3 h long lifetime test. &copy; 2016 The Royal Society of Chemistry.
  • Volume:6
  • Issue:61
  • Translation or Not:no