AI Article Synopsis

  • Thermoelectricity (TE) is becoming a viable method for energy harvesting and creating new thermal sensors, particularly through innovative thermoelectric generators (TEGs) using nanomaterials.
  • A specific study focused on a silicon thin-film thermocouples doped with phosphorus and boron, revealing its performance at temperatures ranging from 50 to 350 K.
  • The results indicated a better thermoelectric figure of merit for the thin films compared to bulk silicon, showing a zT value of 0.0093 at room temperature, and the TEG's overall figure of merit was measured at 0.0046.

Article Abstract

Thermoelectricity (TE) is proving to be a promising way to harvest energy for small applications and to produce a new range of thermal sensors. Recently, several thermoelectric generators (TEGs) based on nanomaterials have been developed, outperforming the efficiencies of many previous bulk generators. Here, we presented the thermoelectric characterization at different temperatures (from 50 to 350 K) of the Si thin-film based on Phosphorous (n) and Boron (p) doped thermocouples that conform to a planar micro TEG. The thermocouples were defined through selective doping by ion implantation, using boron and phosphorous, on a 100 nm thin Si film. The thermal conductivity, the Seebeck coefficient, and the electrical resistivity of each Si thermocouple was experimentally determined using the in-built heater/sensor probes and the resulting values were refined with the aid of finite element modeling (FEM). The results showed a thermoelectric figure of merit for the Si thin films of z T = 0.0093, at room temperature, which was about 12% higher than the bulk Si. In addition, we tested the thermoelectric performance of the TEG by measuring its own figure of merit, yielding a result of = 0.0046 at room temperature.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6523325PMC
http://dx.doi.org/10.3390/nano9040653DOI Listing

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