  We numerically investigate the thermoelectric properties of a triangle
quantum dot connected to metallic electrodes using the non-equilibrium Green's
function method in the Anderson model. Exploiting the equation of motion method
in the Coulomb-blockade regime, the thermovoltage, thermocurrent and heat
dissipation are calculated. Results show that the thermovoltage and
thermocurrent have nonlinear behavior, and the magnitude and sign of them can
be controlled with site energy and coupling strength of quantum dots. Moreover,
we find that the heat current is nonlinear and asymmetric respect to the sign
of bias voltage for all of the site energies of quantum dots. Analyses show
that the heat current can be positive or negative for all of the site energies
and becomes zero for the nonzero voltages. These results can be useful to
determine the performance of the nanoscale electronic devices to control the
heat dissipations.
