A photo‐thermoelectric twist to wireless energy transfer: radial flexible thermoelectric device powered by a high‐power laser beam
Maia, Margarida; Pires, Ana L.; Rocha, Mariana; Ferreira Teixeira, Sofia; Robalinho, Paulo; Frazão, Orlando; Furtado, Cristina; Califórnia, António; Machado, Vasco; Bogas, Sarah; Ferreira, César; Machado, João; Sousa, Luís; Garcia Luis, Uxia; Gomez San Juan, Alejandro Manuel; Orgeira Crespo, Pedro; Navarro Medina, Fermín; Ulloa Sande, Carlos; Camanzo Mariño, Alejandro; Rey Gonzalez, Guillermo David; Pereira, Andreia T.; Aguado Agelet, Fernando Antonio; Jamier, Raphael; Roy, Philippe; Leconte, Baptiste; Auguste, Jean‐Louis; Pereira, André M.
DATE:
2023-08-11
UNIVERSAL IDENTIFIER: http://hdl.handle.net/11093/5922
EDITED VERSION: https://doi.org/10.1002/admt.202202104
UNESCO SUBJECT: 3301 Ingeniería y Tecnología Aeronáuticas
DOCUMENT TYPE: article
ABSTRACT
Systems for wireless energy transmission (WET) are gaining prominence nowadays. This work presents a WET system based on the photo-thermoelectric effect. With an incident laser beam at λ = 1450 nm, a temperature gradient is generated in the radial flexible thermoelectric (TE) device, with a carbon-based light collector in its center to enhance the photoheating. The three-part prototype presents a unique approach by using a radial TE device with one simple manufacturing process - screen-printing. A TE ink with a polymeric matrix of poly(3,4-ethylenedioxythiophene) polystyrene sulfonate and doped-Poly(vinyl alcohol) with Sb-Bi-Te microparticles is developed (S∽33 µVK−1 and s∽10.31 Sm−1), presenting mechanical and electrical stability. Regarding the device, a full electrical analysis is performed, and the influence of the light collector is investigated using thermal tests, spectrophotometry, and numerical simulations. A maximum output voltage (Vout) of ∽16 mV and maximum power density of ∽25 µWm−2 are achieved with Plaser = 2 W. Moreover, the device's viability under extreme conditions is explored. At T∽180 K, a 25% increase in Vout compared to room-temperature conditions is achieved, and at low pressures (∽10‒6 Torr), an increase of 230% is obtained. Overall, this prototype allows the supply of energy at long distances and remote places, especially for space exploration.
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