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2 May 2019 Thermoelectric efficiency optimization of nanoantennas for solar energy harvesting
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Abstract
We compared 9  ×  9 arrays of bimetallic Ni(Nickel)-Pt(Platinum) nanoantennas for a classic and evolutive dipole configuration. We fabricated the nanoantennas by e-beam lithography and characterized them with a solar simulator to analyze the I  −  V curves. From these curves, a thermoelectric voltage dependence associated by classic and evolutive dipole configuration was observed. We show that the evolutive dipole nanoantennas (EDN) generate up to three times more voltage in contrast with the classic dipole nanoantenna (CDN). Indeed, the evolutive configuration is 1.3 times more efficient than its classical counterpart. The results are corroborated by absorbance of these nanoantennas in the 20 to 36 THz range, where EDN is 40% more efficient than CDN and 30% in the range of 36.1 to 90 THz. Moreover, the experimental results match the thermoelectric behavior obtained using numerical simulations. The EDN can be used in applications ranging from aerospace technology to energy harvesting, photodetector, and sensors, where high thermoelectric efficiency is needed.
© 2019 Society of Photo-Optical Instrumentation Engineers (SPIE) 1934-2608/2019/$25.00 © 2019 SPIE
Javier Mendez-Lozoya, Ramón Díaz de León-Zapata, Edgar Guevara, Gabriel González, and Francisco J. González "Thermoelectric efficiency optimization of nanoantennas for solar energy harvesting," Journal of Nanophotonics 13(2), 026005 (2 May 2019). https://doi.org/10.1117/1.JNP.13.026005
Received: 24 January 2019; Accepted: 9 April 2019; Published: 2 May 2019
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