  We present an analysis of the potential thermoelectric performance of p-type
AgGaTe$_{2}$, which has already shown a $ZT$ of 0.8 with partial optimization,
and observe that the same band structure features, such as a mixture of light
and heavy bands and isotropic transport, that lead to this good performance are
present in certain other ternary chalcopyrite structure semiconductors. We find
that optimal performance of AgGaTe$_2$ will be found for hole concentrations
between 4 $\times 10^{19}$ and 2 $\times 10^{20}$cm$^{-3}$ at 900 K, and 2
$\times 10^{19}$ and 10$^{20}$ cm$^{-3}$ at 700 K, and that certain other
chalcopyrite semiconductors might show good thermoelectric performance at
similar doping ranges and temperatures if not for higher lattice thermal
conductivity.
