Login / Signup

Understanding Phonon Scattering by Nanoprecipitates in Potassium-Doped Lead Chalcogenides.

Zhao WangXiaolong YangDan FengHaijun WuJesus CarreteLi-Dong ZhaoChao LiShaodong ChengBiaolin PengGuang YangJiaqing He
Published in: ACS applied materials & interfaces (2017)
We present a comprehensive experimental and theoretical study of phonon scattering by nanoprecipitates in potassium-doped PbTe, PbSe, and PbS. We highlight the role of the precipitate size distribution measured by microscopy, whose tuning allows for thermal conductivities lower than the limit achievable with a single size. The correlation between the size distribution and the contributions to thermal conductivity from phonons in different frequency ranges provides a physical basis to the experimentally measured thermal conductivities, and a criterion to estimate the lowest achievable thermal conductivity. The results have clear implications for efficiency enhancements in nanostructured bulk thermoelectrics.
Keyphrases
  • quantum dots
  • high resolution
  • mental health
  • highly efficient
  • high throughput
  • metal organic framework
  • optical coherence tomography
  • single cell
  • visible light