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Proceedings Paper

Planar holographic spectrum-splitting PV module design
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Paper Abstract

A design is presented for a planar spectrum-splitting photovoltaic (PV) module using Holographic Optical Elements (HOEs). A repeating array of HOEs diffracts portions of the solar spectrum onto different PV materials arranged in alternating strips. Several combinations of candidate PV materials are explored, and theoretical power conversion efficiency is quantified and compared for each case. The holograms are recorded in dichromated gelatin (DCG) film, an inexpensive material which is easily encapsulated directly into the panel. If desired, the holograms can focus the light to achieve concentration. The side-by-side split spectrum layout has advantages compared to a stacked tandem cell approach: since the cells are electrically isolated, current matching constraints are eliminated. Combinations of dissimilar types of cells are also possible: including crystalline, thin film, and organic PV cells. Configurations which yield significant efficiency gain using relatively inexpensive PV materials are of particular interest. A method used to optimize HOE design to work with a different candidate cells and different package aspect ratios is developed and presented. (Aspect ratio is width of the cell strips vs. the thickness of the panel) The relationship between aspect ratio and HOE performance properties is demonstrated. These properties include diffraction efficiency, spectral selectivity, tracking alignment sensitivity, and uniformity of cell illumination.

Paper Details

Date Published: 15 October 2012
PDF: 9 pages
Proc. SPIE 8468, High and Low Concentrator Systems for Solar Electric Applications VII, 846808 (15 October 2012); doi: 10.1117/12.929387
Show Author Affiliations
Michael Gordon, College of Optical Sciences, The Univ. of Arizona (United States)
Deming Zhang, The Univ. of Arizona (United States)
Shelby Vorndran, College of Optical Sciences, The Univ. of Arizona (United States)
Juan M. Russo, The Univ. of Arizona (United States)
Christine K. Luscombe, Univ. of Washington (United States)
Sean E. Shaheen, Univ. of Denver (United States)
Raymond K. Kostuk, The Univ. of Arizona (United States)


Published in SPIE Proceedings Vol. 8468:
High and Low Concentrator Systems for Solar Electric Applications VII
Kaitlyn VanSant; Adam P. Plesniak, Editor(s)

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