电流法改善碳纳米管阴极场发射特性  

Field Emission Property of CNT Cathodes Improved by Post-treatment of Current

作　　者：方建放[1] 邹儒佳[1] 薛绍林[1] 

机构地区：[1]东华大学理学院,上海201620

出　　处：《光电子技术》2010年第2期84-87,共4页Optoelectronic Technology

摘　　要：针对丝网印刷碳纳米管阴极,提出电流法进行表面后处理,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流法处理前后CNTs阴极表面形貌变化,并对处理前后CNTs阴极进行场发射特性测试。结果表明,电流法处理后CNTs阴极表面残留有机物被破坏,开启电场从2.4V/μm降低到1.6V/μm,同样面积的薄膜(印制面积为1cm×1cm)在2.6V/μm场强下的发射电流由30μA提高到了800μA,说明电流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 current is presented, which effectively improve the field emission characteristics of screen-printed CNT cathodes. Notable changes in the surface morphologies of screen-printed CNT cathodes are investigated by scanning electron micro scope （SEM） as the function of treatment by current. The turn-on electric field of the treated film decreases from 2.4 V/μm to 1.6 V/μm compared with the untreated ones, and the emission current of the films with same areas increases from 30 μA to 800 t2A. This result indicates that current method has a distinct effect on improving the field emission properties of printed CNT films. This method has better utility value than other methods in the fabrication of CNT field emission display.

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]