Investigation, analysis and comparison of current-voltage characteristics for Au/Ni/GaN Schottky structure using I-V-T simulation

In this work, we have presented a theoretical study of Au/Ni/GaN Schottky diode based on current-voltage (I-V) measurement for temperature range of 120 K to 400 K. The electrical parameters of Au/Ni/GaN, such as barrier height (Φ_b), ideality factor and series resistance have been calculated employing the conventional current-voltage (I-V), Cheung and Chattopadhyay method. Also, the variation of Gaussian distribution (P (Φ_b)) as a function of barrier height (Φ_b) has been studied. Therefore, the modified ((ln⁡(I0T2)−(q2σs022kT2)=ln⁡(AA*)−q∅B0kT)vs.(1kT))( {( {\ln \left( {{{{\rm{I}}_0 } \over {{\rm{T}}^2 }}} \right) - \left( {{{{\rm{q}}^2 \sigma _{{\rm{s}}0}^2 } \over {2{\rm{kT}}^2 }}} \right) = \ln ( {{\rm{AA}}^*} ) - {{{\rm{q}}\emptyset_{{\rm B}0} } \over {{\rm{kT}}}}} ){\rm{vs}}.( {{1 \over {{\rm{kT}}}}} )} ) relation has been extracted from (I-V) characteristics, where the values of Φ_B0 and ASimul*{\rm{A}}_{{\rm{Simul}}}^* have been found in different temperature ranges. The obtained results have been compared to the existing experimental data and a good agreement was found.