Semiconductor Blocks Heat Transfer and Preserves Conductivity

A collective rattling effect in a type of crystalline semiconductor was discovered to block most heat transfer while preserving high electrical conductivity — a rare pairing that could reduce heat buildup in electronic devices and turbine engines. The traits were discovered in a class of materials known as halide perovskites, which are also considered promising candidates for next-generation solar panels, nanoscale lasers, electronic cooling, and electronic displays.