Enhanced Performance of Dispenser Printed MA n-type Bi2Te3 Composite Thermoelectric Generators

Autor: Paul K. Wright, James Evans, Deepa Madan, Alic Chen, Zuoqian Wang, Rei Cheng Juang, Jay Keist
Rok vydání: 2012
Předmět:
Zdroj: ACS Applied Materials & Interfaces. 4:6117-6124
ISSN: 1944-8252
1944-8244
DOI: 10.1021/am301759a
Popis: 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.
Databáze: OpenAIRE