Abstract
The field-emission properties of Al:ZnO whisker emitters were investigated by varying the crystallite density and length. The crystallite density could be varied by adjusting the reactant concentration or the substrate temperature under which whiskers were formed. When the crystallite density was decreased from 18 ×104 to 3 ×104/mm2 and the crystallite length was increased from 12 to 19 µm, the electric field necessary to obtain a current density of 100 µA/cm2 decreased from 7.0 to the range of 3.6 to 4.9 V/µm. After the field emission, the crystallite density of some samples decreased. The electric field necessary to obtain a cathode current density of 100 µA/cm2 decreased with increasing geometric electric field enhancement factor β.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
