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Reflection hologram solar spectrum-splitting filters

Zhang, Deming and Gordon, Michael and Russo, Juan M. and Vorndran, Shelby and Escarra, Matthew and Atwater, Harry and Kostuk, Raymond K. (2012) Reflection hologram solar spectrum-splitting filters. In: High and Low Concentrator Systems for Solar Electric Applications VII. Proceedings of SPIE. No.8468. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 846807. ISBN 9780819491855.

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In this paper we investigate the use of holographic filters in solar spectrum splitting applications. Photovoltaic (PV) systems utilizing spectrum splitting have higher theoretical conversion efficiency than single bandgap cell modules. Dichroic band-rejection filters have been used for spectrum splitting applications with some success however these filters are limited to spectral control at fixed reflection angles. Reflection holographic filters are fabricated by recording interference pattern of two coherent beams at arbitrary construction angles. This feature can be used to control the angles over which spectral selectivity is obtained. In addition focusing wavefronts can also be used to increase functionality in the filter. Holograms fabricated in dichromated gelatin (DCG) have the benefit of light weight, low scattering and absorption losses. In addition, reflection holograms recorded in the Lippmann configuration have been shown to produce strong chirping as a result of wet processing. Chirping broadens the filter rejection bandwidth both spectrally and angularly. It can be tuned to achieve spectral bandwidth suitable for spectrum splitting applications. We explore different DCG film fabrication and processing parameters to improve the optical performance of the filter. The diffraction efficiency bandwidth and scattering losses are optimized by changing the exposure energy, isopropanol dehydration bath temperature and hardening bath duration. A holographic spectrum-splitting PV module is proposed with Gallium Arsenide (GaAs) and silicon (Si) PV cells with efficiency of 25.1% and 19.7% respectively. The calculated conversion efficiency with a prototype hologram is 27.94% which is 93.94% compared to the ideal spectrum-splitting efficiency of 29.74%.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Gordon, Michael0000-0002-1913-2682
Escarra, Matthew0000-0002-0232-942X
Atwater, Harry0000-0001-9435-0201
Additional Information:© 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). The authors wish to acknowledge support from the NSF/DOE ERC cooperative agreement No. EEC-1041895, the NSF Grant No. 0925085 and Research Corporation.
Funding AgencyGrant Number
Department of Energy (DOE)UNSPECIFIED
Research CorporationUNSPECIFIED
Subject Keywords:Solar energy, photovoltaic, holographic optical elements, spectrum-splitting
Series Name:Proceedings of SPIE
Issue or Number:8468
Record Number:CaltechAUTHORS:20161024-135602634
Persistent URL:
Official Citation:Deming Zhang ; Michael Gordon ; Juan M. Russo ; Shelby Vorndran ; Matthew Escarra ; Harry Atwater and Raymond K. Kostuk " Reflection hologram solar spectrum-splitting filters ", Proc. SPIE 8468, High and Low Concentrator Systems for Solar Electric Applications VII, 846807 (October 10, 2012); doi:10.1117/12.929187;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:71398
Deposited By: George Porter
Deposited On:24 Oct 2016 21:08
Last Modified:11 Nov 2021 04:44

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