Tilt-structure and high-performance of hierarchical Bi_1.5Sb_0.5Te₃ nanopillar arrays.

ABSTRACT: The uniquely tilted nanopillar array favorably influence carrier and phonon transport properties. We present an innovative interfacial design concept and a novel tilt-structure of hierarchical Bi_1.5Sb_0.5Te₃ nanopillar array comprising unique interfaces from nano-scaled open gaps to coherent grain boundaries, and tilted nanopillars assembled by high-quality nanowires with well oriented growth, utilizing a simple vacuum thermal evaporation technique. The unusual structure Bi_1.5Sb_0.5Te₃ nanopillar array with a tilt angle of 45° exhibits a high thermoelectric performance ZT = 1.61 at room temperature. The relatively high ZT value in contrast to that of previously reported Bi_1.5Sb_0.5Te₃ materials

SUBMITTER: Tan M 

PROVIDER: S-EPMC5913231 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature