The room-temperature electron (62 cm 2 /Vs) and hole (20 cm 2 /Vs) mobilities estimated with the semi-empirical models, reported in Table , are in close agreement with the mobilities (electron -49 cm 2 /Vs, holes -22 cm 2 /Vs) obtained from detailed Boltzmann transport calculations (Figures ). Furthermore, the predicted maximum zT of n-type Y 2 Te 3 (∼1.2, Figure ) is higher than p-type (∼0.8, see Figure ). This trend is consistent with the larger β n compared to β p (Table ). Accordingly, this study provides further validation of the fitted transport models used to predict high TE performance in e.g. binary compounds, oxides, and Zintl phases.