Title :
Field-Emission Characteristics of Zinc Oxide Nanowires Using Low-Temperature Supercritical Carbon Dioxide Fluid Method
Author :
Yang, Po-Yu ; Agarwal, Sanjay ; Cheng, Huang-Chung
Author_Institution :
Dept. of Electron. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
Single-crystalline ZnO nanowires (NWs) were directly grown on Zn/glass substrates by using a low-temperature (i.e., 40°C) supercritical carbon dioxide (SCCO2) fluid method. The optical, physical, and field-emission (FE) characteristics of the SCCO2 -synthesized ZnO nanostructures are systematically investigated. ZnO NWs exhibited the low turn-on field of 3.16 V/μm at a current density of 10 μA/cm2 and a low threshold field of 4.38 V/μm at a current density of 1 mA/cm2. The current fluctuation of ZnO emitters was less than 8% at 5.3 V/μm in 12 h. The excellent FE properties of SCCO2-synthesized ZnO emitters at low temperature make them a superior candidate for FE-based display devices.
Keywords :
II-VI semiconductors; current density; field emission; nanofabrication; nanowires; semiconductor growth; wide band gap semiconductors; zinc compounds; FE-based display devices; Zn-SiO2; Zn-glass substrates; ZnO; ZnO emitters; ZnO nanostructures; current density; current fluctuation; field-emission characteristics; low-temperature supercritical carbon dioxide fluid method; optical characteristics; physical characteristics; single-crystalline ZnO nanowires; temperature 40 degC; threshold field; time 12 h; turn-on field; zinc oxide nanowires; Carbon dioxide; Glass; Iron; Substrates; Water; Zinc oxide; Field emission (FE); low temperature; nanowire (NW); supercritical carbon dioxide $(hbox{SCCO}_{2})$ fluid method; zinc oxide (ZnO);
Journal_Title :
Electron Device Letters, IEEE
DOI :
10.1109/LED.2011.2171030
