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 |
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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 |
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