We demonstrate the application of the computational alloy optimization framework by identifying Ba 2(1 x) Sr 2x CdP 2 Zintl phase alloys that simultaneously achieve: (1) conduction band convergence, (2) reduced alloy scattering of electrons, (3) reduced lattice thermal conductivity, and (4) suitable n-type dopability. As schematically illustrated in Figure , band convergence enhances the power factor while reduced alloy scattering of electrons minimizes reduction of the intrinsic carrier mobility. A reduction in the lattice thermal conductivity is expected due to increased phonon scattering and lattice softening. Finally, it has to be examined how alloying affects n-type dopability. The details of the firstprinciples calculations, alloy models, and defect calculations can be found in Section 4.