Grain boundary re-crystallization and sub-nano regions leading to high plateau figure of merit for Bi<sub>2</sub>Te<sub>3</sub> nanoflakes
Wei‐Di Liu, Liang‐Cao Yin, Lei Li, Qishuo Yang, De‐Zhuang Wang, Meng Li, Xiao‐Lei Shi, Qingfeng Liu, Yang Bai, I. Gentle, Lianzhou Wang, Zhi‐Gang Chen
Abstract
Solvothermally synthesized Bi 2 Te 3 nanoflakes can re-crystallize preferentially at the grain boundaries to form sub-nano boundary regions with a width <2 nm leading to a wide plateau figure of merit ( zT ) of >1.2 (from ∼323 to ∼423 K).
Topics & Concepts
Plateau (mathematics)Grain boundaryCrystallizationFigure of meritNano-Materials scienceCondensed matter physicsBoundary (topology)CrystallographyMineralogyMicrostructurePhysicsThermodynamicsMetallurgyComposite materialChemistryOptoelectronicsMathematicsMathematical analysisAdvanced Thermoelectric Materials and DevicesTopological Materials and PhenomenaPhysics of Superconductivity and Magnetism