The effect of oxygen plasma treatment on the field emission properties of lanthanum hexaboride tip emitter
The effect of oxygen plasma treatment on the field emission properties of lanthanum hexaboride tip emitter
复制标题
氧等离子体处理对六硼化镧尖端发射极场发射性能的影响
DOI：
10.1088/2053-1591/aafb40
复制
发表时间：
2019
影响因子：
2.3
通讯作者：
Cao Guichuan
中科院分区：
文献类型：
--
作者：
Wang Xiaoju;Lv Yifan;Wang Haozhi;Qi Kangcheng;Cao Guichuan
采用电化学腐蚀技术制备了多晶六硼化镧（LaB6）尖端场发射体。重点讨论了氧等离子体处理对其形貌、结构和场发射性能的影响。结果表明，氧等离子体处理后，发射极的表面形貌没有发生明显变化。氧等离子体处理不会在LaB 6发射体中引入任何新相，但消除了表面污染物，从而导致功函数降低。在场发射测试中，处理2 min的阴极表现出最佳的发射性能。在2000 V时电流可达8.2 μA，特别是抗氧离子轰击能力强。
Polycrystal lanthanum hexaboride (LaB6) tip field emitter has been prepared using the electrochemical etching technique. The effects of oxygen plasma treatment on its morphology, structure and field emission properties are mainly discussed. The results reveal that the surface morphology of emitters did not change significantly after oxygen plasma treatment. The oxygen plasma treatment does not introduce any new phase into LaB6 emitter, but eliminates surface contaminants, which lead to lower work function. The cathode treated by 2 min shows the best emission performance during the field emission measurement. It obtains 8.2 μA at 2000 V, especially exhibiting strong ability of anti oxygen ion bombardment.