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Micro-concentrators for a microsystems-enabled photovoltaic system

Bradley H. Jared, Michael P. Saavedra, Ben J. Anderson, Ron S. Goeke, William C. Sweatt, Gregory N. Nielson, Murat Okandan, Brenton Elisberg, Dave Snively, John Duncan, Tian Gu, Gautam Agrawal, and Michael W. Haney

Open Access Open Access

Abstract

A 100X magnification, ± 2.5° field of view micro-concentrating optical system has been developed for a microsystems-enabled photovoltaic (MEPV) prototype module using 250 µm diameter multi-junction “stacked” PV cells.

© 2014 Optical Society of America

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Figures (9)
Fig. 1
Fig. 1 MEPV micro-concentrator optical design (left) and output beam profile (right).

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Fig. 2
Fig. 2 Thermo-mechanical modeling of the micro-concentrator PDMS filled region.

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Fig. 3
Fig. 3 MEPV module cross-section.

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Fig. 4
Fig. 4 MEPV front lens array (left) and cell array to optic array alignment features (right).

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Fig. 5
Fig. 5 Rear optic mold insert (left) and molded micro-concentrator array (right).

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Fig. 6
Fig. 6 Test part in-plane X positioning accuracy (left) and out-of-plane distortion (right).

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Fig. 7
Fig. 7 Molded rear array 24 nm Ra surface finish (left) and ± 11 µm form error (right).

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Fig. 8
Fig. 8 Optical sub-assembly beam profile under simulated one sun illumination.

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Fig. 9
Fig. 9 Optical sub-assembly transmission spectrum.

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