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Proceedings Paper

Solar spectrum rectification using nano-antennas and tunneling diodes
Author(s): Mario Dagenais; Kwangsik Choi; Filiz Yesilkoy; Athanasios N. Chryssis; Martin C. Peckerar
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Paper Abstract

Our goal is to develop a rectifying antenna (rectenna) applicable to solar spectrum energy harvesting. In particular, we aim to demonstrate viable techniques for converting portion of the solar spectrum not efficiently converted to electric power by current photovoltaic approaches. Novel design guidelines are suggested for rectifying antenna coupled tunneling diodes. We propose a new geometric field enhancement scheme in antenna coupled tunneling diodes that uses surface plasmon resonances. For this purpose, we have successfully implemented a planar tunneling diode with polysilion/SiO2/polysilcon structure. An antenna coupled asymmetric tunneling diode is developed with a pointed triangle electrode for geometric field enhancement. The geometrically asymmetric tunneling diode shows a unique asymmetric tunneling current versus voltage characteristic. Through comparison with crossover tunneling diodes, we verified that the current asymmetry is not from the work function difference between the two electrodes. Results of RF rectification tests using the asymmetric diode demonstrate that our approach is practical for energy harvesting application. Furthermore, we describe how surface plasmons can enhance the electric field across the tunnel junction, lowering the effective "turn-on" voltage of the diode, further improving rectification efficiency.

Paper Details

Date Published: 15 February 2010
PDF: 12 pages
Proc. SPIE 7605, Optoelectronic Integrated Circuits XII, 76050E (15 February 2010); doi: 10.1117/12.845931
Show Author Affiliations
Mario Dagenais, Univ. of Maryland, College Park (United States)
Kwangsik Choi, Univ. of Maryland, College Park (United States)
Filiz Yesilkoy, Univ. of Maryland, College Park (United States)
Athanasios N. Chryssis, Univ. of Maryland, College Park (United States)
Martin C. Peckerar, Univ. of Maryland, College Park (United States)

Published in SPIE Proceedings Vol. 7605:
Optoelectronic Integrated Circuits XII
Louay A. Eldada; El-Hang Lee, Editor(s)

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