Helical dislocation-driven plasticity and flexible high-performance thermoelectric generator in α-Mg₃Bi₂ single crystals.

ABSTRACT: Inorganic plastic semiconductors play a crucial role in the realm of flexible electronics. In this study, we present a cost-effective plastic thermoelectric semimetal magnesium bismuthide (α-Mg₃Bi₂), exhibiting remarkable thermoelectric performance. Bulk single-crystalline α-Mg₃Bi₂ exhibits considerable plastic deformation at room temperature, allowing for the fabrication of intricate shapes such as the letters "SUSTECH" and a flexible chain. Transmission electron microscopy, time-of-flight neutron diffraction, and chemical bonding theoretic analyses elucidate that the plasticity of α-Mg₃Bi₂ stems from the helical dislocation-driven interlayer slip, small-sized Mg atoms induced weak interlayer Mg-Bi bonds, and low modulus of

SUBMITTER: Hu M 

PROVIDER: S-EPMC11695975 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature