Highly Textured N-Type SnSe Polycrystals with Enhanced Thermoelectric Performance
TEM images of textured Sn1.005Se0.94Br0.06 along the directions that are perpendicular (a) and parallel (b) to the SPS pressure. The EDS and SAED patterns are taken from the red cross region (1) (2) and (3) (4) in (a) and (b), respectively; the inset shows the existence of Sn cobblestone-shaped grains (circled by white dotted line) and bar-like grains (circled by red dotted line) in the SnSe-based matrix.
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