Fig. 5 Thermoelectric performance of pristine Bi2Se3 nanoplate and the heterostructure. Thermoelectric performance of pristine Bi2Se3 nanoplate and the heterostructure. (A to F) The electrical conductivity σ (A), Seebeck coefficient S (B), power factor σS2 (C), thermal diffusivity α (D), thermal conductivity κ (E), and figure of merit ZT (F) of pristine Bi2Se3 nanoplate and PbSe/Bi2Se3 heterostructure bulk, which were prepared by hot pressing under the same conditions. Zhaoyang Lin et al. Sci Adv 2016;2:e1600993 Copyright © 2016, The Authors