Portal de Periódicos da CAPES

A Photo‐Thermoelectric Twist to Wireless Energy Transfer: Radial Flexible Thermoelectric Device Powered by a High‐Power Laser Beam

2023; Wiley; Volume: 8; Issue: 15 Linguagem: Inglês

10.1002/admt.202202104

2365-709X

M. Maia, Ana L. Pires, Mariana Rocha, Sofia Ferreira‐Teixeira, Paulo Robalinho, Orlando Frazão, Cristina Furtado, António Califórnia, Vasco Machado, Sarah Bogas, César Ferreira, João Machado, Luís Miguel Sousa, Uxía García-Luis, Alejandro M. G. San-Juan, Paulo Crespo, Fermín Navarro-Medina, Carlos Ulloa, Alejandro Camanzo Mariño, Guillermo R. González, André M. Pereira, Fernando A. Agelet, Raphaël Jamier, Philippe Roy, Baptiste Leconte, Jean‐Louis Auguste, André M. Pereira,

Gas Sensing Nanomaterials and Sensors

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.