Segmented power generator modules of Bi2Te3 and ErAs:InGaAlAs embedded with ErAs nanoparticles

Gehong Zeng, Je Hyeong Bahk, John E. Bowers, Hong Lu, Joshua M.O. Zide, Arthur C. Gossard, Rajeev Singh, Zhixi Bian, Ali Shakouri, Suzanne L. Singer, Woochul Kim, Aran Majumdar

Research output: Contribution to journalConference articlepeer-review


We report the fabrication and characterization of segmented element power generator modules of 254 thermoelectric elements. The element is 1 mm × 1 mm in area, which consists of 300 μm thickness Bi2Te3 and 50 μm thickness ErAs:(InGaAs)1-x(InAlAs)x, so that each segment can work at different temperature ranges. Erbium arsenide metallic nanoparticles are incorporated to create scattering centers for middle and long wavelength phonons, provide charge carriers, and form local Schottky barriers for electron filtering. The thermoelectric properties of ErAs:InGaAlAs were characterized by variable temperature measurements of thermal conductivity, electrical conductivity and Seebeck coefficient from 300 K to 600 K. Generator modules of Bi2Te3 and ErAs:InGaAlAs segmented elements were fabricated and an output power over 5.5 W was measured. The performance of the thermoelectric generator modules can further be improved by improving the thermoelectric properties of the element material, and reducing the electrical and thermal parasitic losses.

Original languageEnglish
Pages (from-to)435-440
Number of pages6
JournalMaterials Research Society Symposium Proceedings
Publication statusPublished - 2008
EventThermoelectric Power Generation - Boston, MA, United States
Duration: 2007 Nov 262007 Nov 29

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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