Ultra-low Thermal Conductivity In All-Inorganic Halide Perovskites
All-inorganic halide perovskite nanowires by facile low-temperature processes uniquely exhibit ultralow thermal conductivity.
Discovered ultralow thermal conductivity (~0.4 W/m∙K), comparable to their amorphous limit in single-crystalline all-inorganic halide perovskite nanowires and attributed it to a cluster rattling mechanism.
Significance and Impact
Opens up opportunities for energy conversion applications and calls attention to the thermal management strategies for applications with all-inorganic halide perovskites.
- Single-crystalline all-inorganic halide perovskite nanowires synthesized by facile low-temperature solution processes show ultralow thermal conductivity regardless of different phases and compositions.
- Black-phase CsSnI3 shows a rare combination of ultralow thermal conductivity and high electrical conductivity, resulting in ZT of 0.11 around room temperature.