17 April 2015 Thermal to electrical energy converter based on black Si
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Abstract
Photo-thermal - to - electrical converter is demonstrated by using a commercial Peltier Bi-Te element with a hot contact made out of nanotextured Si (black-Si). Black-Si with colloidal Au nanoparticles is shown to further increase the efficiency of thermal-to-electrical conversion. Peculiarities of heat harvesting using black-Si with plasmonic Au nanoparticles at different gold densities are analyzed. Solar radiation absorption and electric field enhancement in plain and Au nanoparticle decorated black-Si was simulated using finite difference time domain (FDTD) method. Thermal conduction in nanotextured black-Si was explained using phonon Monte-Carlo simulations at the nanoscale. Strategies for creating larger thermal gradient on Peltier element using nanotextured light absorbers is discussed.
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Yoshiaki Nishijima, Yoshiaki Nishijima, A. Balčytis, A. Balčytis, R. Komatsu, R. Komatsu, T. Yamamura, T. Yamamura, G. Seniutinas, G. Seniutinas, Basil T. Wong, Basil T. Wong, S. Juodkazis, S. Juodkazis, } "Thermal to electrical energy converter based on black Si", Proc. SPIE 9374, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics VIII, 93740J (17 April 2015); doi: 10.1117/12.2082403; https://doi.org/10.1117/12.2082403
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