TY - JOUR T1 - Fowler-nordheim plot behavior and mechanism of field electron emission from ZnO tetrapod structures JF - ACS Nano Y1 - 2010 A1 - Al-Tabbakh, Ahmed A. A1 - More, Mahendra A. A1 - Joag, Dilip S. A1 - Mulla, Imtiaz S. A1 - Pillai, Vijayamohanan K. KW - field emission KW - Fowler-Nordheim plot KW - Nanostructures KW - nonlinearity KW - ZnO AB -

Field emission measurements of current-voltage characteristics are reported for tetrapod structures of ZnO. The nonlinear Fowler-Nordheim (FN) plot is analyzed according to a model of calculation based on saturation of conduction band current and predominance of valence band current at high-field values. The simulated FN plot exhibits similar features to those observed experimentally. The model of calculation suggests that the slope variation of the FN plot, in the high-field and low-field regions, does not depend on the magnitude of saturation. Instead, it is a characteristic of the energy band structure and voltage-to-barrier-field conversion factor of the emitting material.

PB - AMER CHEMICAL SOC CY - 1155 16TH ST, NW, WASHINGTON, DC 20036 USA VL - 4 IS - 10 U3 - Foreign U4 - 9.855 ER -