scholarly journals Fabrication and Characterization of Flexible Thermoelectric Generators Using Micromachining and Electroplating Techniques

Micromachines ◽  
2019 ◽  
Vol 10 (10) ◽  
pp. 660 ◽  
Author(s):  
Wnag-Lin Lee ◽  
Po-Jen Shih ◽  
Cheng-Chih Hsu ◽  
Ching-Liang Dai

This study involves the fabrication and measurement of a flexible thermoelectric generator (FTG) using micromachining and electroplating processes. The area of the FTG is 46 × 17 mm2, and it is composed of 39 thermocouples in series. The thermoelectric materials that are used for the FTG are copper and nickel. The fabrication process involves patterning a silver seed layer on the polymethyl methacrylate (PMMA) substrate using a computer numerical control (CNC) micro-milling machine. Thermoelectric materials, copper and nickel, are deposited on the PMMA substrate using an electroplating process. An epoxy polymer is then coated onto the PMMA substrate. Acetone solution is then used to etch the PMMA substrate and to transfer the thermocouples to the flexible epoxy film. The FTG generates an output voltage (OV) as the thermocouples have a temperature difference (ΔT) between the cold and hot parts. The experiments show that the OV of the FTG is 4.2 mV at ΔT of 5.3 K and the output power is 429 nW at ΔT of 5.3 K. The FTG has a voltage factor of 1 μV/mm2K and a power factor of 19.5 pW/mm2K2. The FTG reaches a curvature of 20 m−1.

2020 ◽  
Vol 5 (5) ◽  
pp. 1901128
Author(s):  
Yusufu Ekubaru ◽  
Tohru Sugahara ◽  
Kenzo Ibano ◽  
Aiji Suetake ◽  
Maki Tsurumoto ◽  
...  

2019 ◽  
Vol 37 (4) ◽  
pp. 101-112
Author(s):  
M. Hajfarajzadeh ◽  
A. Eshaghi ◽  
A. Aghaei ◽  
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◽  
...  

2019 ◽  
Vol 70 (7) ◽  
pp. 107-111
Author(s):  
Miroslav Mikolasek ◽  
Martin Kemeny ◽  
Filip Chymo ◽  
Peter Ondrejka ◽  
Jozef Huran

Abstract The paper presents fabrication and characterization of amorphous silicon carbide (a-SiC:H) based structures for photo-electrochemical (PEC) water splitting. The increase of the photocurrent of PEC upon the decreased of CH4 flow during the deposition is associated with the decrease of the band gap and increased absorption of light in a-SiC:H. Photocurrent of 50 µA/cm2 is achieved for PEC structure prepared with the lowest CH4 flow during the deposition. An ITO/a-SiC:H/Si silicon heterojunction structure forming a simple photovoltaic cell (PV) with efficiency of 9.66% was prepared to support additional voltage hereby forming a hybrid PEC-PV system. ASA simulation revealed that a photocurrent of 0.62 mA/cm2 and solar to hydrogen efficiency of 0.76% can be achieved for hybrid a PEC-PV structure with 5 PVs connected in series behind the PEC cell. Further opportunities for increasing the performance are discussed and summarized.


2019 ◽  
Vol 35 (4) ◽  
pp. 475-484
Author(s):  
SHIVA ARUN ◽  
◽  
PRABHA BHARTIYA ◽  
AMREEN NAZ ◽  
SUDHEER RAI ◽  
...  

2019 ◽  
Vol 139 (11) ◽  
pp. 375-380
Author(s):  
Harutoshi Takahashi ◽  
Yuta Namba ◽  
Takashi Abe ◽  
Masayuki Sohgawa

2015 ◽  
Vol 135 (11) ◽  
pp. 474-475
Author(s):  
Koji Sugano ◽  
Ryoji Hiraoka ◽  
Toshiyuki Tsuchiya ◽  
Osamu Tabata

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