17 April 2015 Thermal to electrical energy converter based on black Si
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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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