|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Thermal Transport in High ZT Bulk Silicon Thermoelectric Materials
||Seyed Aria Hosseini, Jackson R. Harter, Todd S. Palmer, Lorenzo Mangolini, P. Alex Greaney
|On-Site Speaker (Planned)
||Seyed Aria Hosseini
Recently researchers have developed processes for synthesizing monolithic Si with large thermoelectric figure-of-merit ZT. These materials hold fantastic promise for realizing large scale waste heat recovery using materials that are inexpensive, abundant and environmentally benign. These materials obtain large ZT through a fine dispersion of nanoscale oxide and or carbide particles. In this work we elucidate the role these particles play in reducing thermal conductivity and increasing ZT. We determine the effect of impurities on scattering heat carriers and quantify the scattering cross section for phonon wavepackets with different wavelengths. We use Boltzmann transport simulations to predict the collective effect of the particle dispersion close to the Knudsen regime. Developing high ZT Si based thermoelectrics will have technological impact by introducing devices which can not only increase the efficiency of many heat engine cycles, but also bring the realization of industrial affordable solar energy cycle a step closer.
||Planned: Stand-alone book in which only your symposium’s papers would appear (indicate title in comments section below)