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Enhanced efficiency for building integrated concentrator photovoltaic modules based on rare earth doped optics

Day, Joseph; Senthilarasu, S.; Mallick, Tapas K.

Authors

Joseph Day

Tapas K. Mallick



Abstract

A major challenge facing silicon solar cells used in building-integrated concentrator photovoltaics (BICPV) is their reduced electrical response when exposed to light of short or long wavelengths. In an attempt to tackle this problem, single cell static CPV modules were fabricated with some of the devices containing rare earth doped compounds which were dispersed into the system in varying concentrations and geometries. Under a solar simulator at 1000 W/m2, the power conversion efficiency (PCE) of devices improved up to 11.1% relative through the addition of these materials. At lower irradiances and compared to cells without concentrators, the relative efficiency gains were more pronounced and external quantum efficiency (EQE) measurements suggested spectral conversion was responsible for these enhancements. For a large scale BICPV system, a simple analysis showed cost per watt could fall by up to 8.1% and power output increased from 25.7 to 28.4 W/m2 through this approach.

Journal Article Type Article
Acceptance Date Apr 12, 2019
Online Publication Date Apr 29, 2019
Publication Date Sep 1, 2019
Deposit Date Mar 13, 2023
Publicly Available Date Mar 16, 2023
Print ISSN 0927-0248
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 199
Pages 83-90
DOI https://doi.org/10.1016/j.solmat.2019.04.013
Keywords Building integrated PV, Concentrating PV, Efficiency, Nanomaterials, Rare earth ions, Spectral conversion

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