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  • Title: Enhanced performance of dispenser printed MA n-type Bi₂Te₃ composite thermoelectric generators.
    Author: Madan D, Wang Z, Chen A, Juang RC, Keist J, Wright PK, Evans JW.
    Journal: ACS Appl Mater Interfaces; 2012 Nov; 4(11):6117-24. PubMed ID: 23130550.
    Abstract:
    This work presents performance advancements of dispenser printed composite thermoelectric materials and devices. Dispenser printed thick films allow for low-cost and scalable manufacturing of microscale energy harvesting devices. A maximum ZT value of 0.31 has been achieved for mechanically alloyed (MA) n-type Bi₂Te₃-epoxy composite films with 1 wt % Se cured at 350 °C. The enhancement of ZT is a result of increase in the electrical conductivity through the addition of Se, which ultimately lowers the sintering temperature (350 °C). A 62 single-leg thermoelectric generator (TEG) prototype with 5 mm ×700 μm × 120 μm printed element dimensions was fabricated on a custom designed polyimide substrate with thick metal contacts. The prototype device produced a power output of 25 μW at 0.23 mA current and 109 mV voltage for a temperature difference of 20 °C, which is sufficient for low power generation for autonomous microsystem applications.
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