  We consider a lateral hetero-junction where the left and right leads are made
of monolayer graphene and the middle region is made of a gapped tilted Dirac
material (borophene or quinoid graphene) illuminated with off-resonant
circularly polarized radiation. The tilt parameter $v_t$ makes the band gap
indirect and smaller in magnitude as compared to Dirac materials without tilt.
Exposure to radiation makes the band gaps of the central region
valley-dependent which show their signatures as valley polarized charge and
thermal currents, thereby causing a valley Seebeck effect. We study the
variation of the valley polarized electrical conductance, thermal conductance,
thermopower and figure of merit of this junction with chemical potential $\mu$
and a tunable gap parameter $\eta$. For non-zero $\eta$, all the valley
polarized quantities are peaked at certain values of chemical potential and
then vanish asymptotically. Increase in gap parameter enhances the valley
thermopower and valley figure of merit, whereas the valley conductances
(electrical and thermal) show non monotonic behavior with $\eta$. We also
compare the valley polarized quantities with their corresponding charge
counterparts (effective contribution from both the valleys). The charge
thermopower and the charge figure of merit behave non monotonically with $\eta$
and the charge conductances (electrical and thermal) depict a decreasing trend
with $\eta$. Furthermore, the tilt parameter reduces the effective transmission
of carriers through the junction, thereby diminishing all the charge and valley
polarized quantities. As the gaps in the dispersion can be adjusted by varying
the intensity of light as well as the Semenoff mass, the tunability of this
junction with regard to its thermoelectric properties may be experimentally
realizable.
