电解液法改善碳纳米管阴极场发射特性  

Improvement of the Field Emission Property of CNT Cathodes by Post-treatment of NaCl Electrolyte

作　　者：方建放[1] 邹儒佳[1] 薛绍林[1] 

机构地区：[1]东华大学应用物理系,上海201620

出　　处：《半导体光电》2010年第5期743-746,共4页Semiconductor Optoelectronics

摘　　要：针对丝网印刷碳纳米管(CNT)阴极,提出用电解液法进行表面后处理,有效改善碳纳米管阴极场发射特性。利用扫描电子显微镜表征电解液法处理前后CNT阴极表面形貌变化,并对处理前后CNT阴极进行场发射特性测试。结果表明,电解液法处理后有更多的CNT伸出有机浆料表面,开启电场从2.4V/μm降低到1.4V/μm,同样面积的薄膜(印制面积为1cm×1cm)在3.0V/μm场强下的发射电流由100μA提高到了1800μA,说明电解液处理对于提高薄膜的场发射特性有明显作用。该方法在碳纳米管场发射显示器的制作中具有很好的实际应用价值。A novel post-treatment method of NaCl electrolyte is proposed to effectively improve the field emission characteristics of screen-printed CNTs cathodes,notable changes in the surface morphologies of which are investigated by scanning electron micro scope（SEM）.Compared with the untreated films,more CNTs can expose from the CNT films,and the turn-on electric field of the treated films decreases from 2.4V/μm to 1.4V/μm.The emission current of the treated films with the same printing area（1cm×1cm）increases from 100μA to 1 800μA.This result indicates that the proposed method has distinct effect in improving the field emission properties of printed CNTs films.

关 键 词：丝网印刷 场发射 碳纳米管阴极 表面处理 

分 类 号：O462.4[理学—电子物理学]