Ultralow thermal conductivity in all-inorganic halide perovskites.

ABSTRACT: Controlling the flow of thermal energy is crucial to numerous applications ranging from microelectronic devices to energy storage and energy conversion devices. Here, we report ultralow lattice thermal conductivities of solution-synthesized, single-crystalline all-inorganic halide perovskite nanowires composed of CsPbI₃ (0.45 ± 0.05 W·m^-1·K^-1), CsPbBr₃ (0.42 ± 0.04 W·m^-1·K^-1), and CsSnI₃ (0.38 ± 0.04 W·m^-1·K^-1). We attribute this ultralow thermal conductivity to the cluster rattling mechanism, wherein strong optical-acoustic phonon scatterings are driven by a mixture of 0D/1D/2D collective motions. Remarkably, CsSnI₃ possesses a rare combination of ultralow thermal conductivity, hi

SUBMITTER: Lee W 

PROVIDER: S-EPMC5565476 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature