Optimal lateral splitting of the AM1.5 solar spectrum for a mono-Si and CdTe two cell PV array

K. Olson, E. Nelson, P. Cohen, J. Talghader

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

An analysis of the optimal spectral splitting for a lateral two-cell solar photovoltaic system is described and tested experimentally. A diffraction grating with arbitrary but known transmission efficiency versus wavelength was used to split the spectrum. An AM1.5 spectrum was produced using a Xe-arc lamp with 5mm pinhole, AM1.5 optical filter for Xe-arc lamps, and a collimating lens. Detailed balance simulations for solar p-n junctions were performed on the AM1.5 spectrum weighted by the optical transmission efficiency of the diffraction grating. When the optical efficiency is included in the detailed balance calculations, an accurate prediction for the performance of the experiment is obtained. Using the simple diffraction grating, we calculate the optimal efficiency of the system under no concentration to be ∼23.2% with cells of band gaps 1.14 and 1.82eV. Using mono-Si and CdTe with band gaps of 1.12 and 1.46eV respectively results in an optimal spectral split at 849nm and a total efficiency of 21.1%. Experimentally the result is proven using a mono-Si and CdTe PV array by splitting the spectrum over many wavelengths and finding the optimal split.

Original languageEnglish (US)
Title of host publicationProgram - 37th IEEE Photovoltaic Specialists Conference, PVSC 2011
Pages2100-2104
Number of pages5
DOIs
StatePublished - Dec 1 2011
Event37th IEEE Photovoltaic Specialists Conference, PVSC 2011 - Seattle, WA, United States
Duration: Jun 19 2011Jun 24 2011

Publication series

NameConference Record of the IEEE Photovoltaic Specialists Conference
ISSN (Print)0160-8371

Other

Other37th IEEE Photovoltaic Specialists Conference, PVSC 2011
CountryUnited States
CitySeattle, WA
Period6/19/116/24/11

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  • Cite this

    Olson, K., Nelson, E., Cohen, P., & Talghader, J. (2011). Optimal lateral splitting of the AM1.5 solar spectrum for a mono-Si and CdTe two cell PV array. In Program - 37th IEEE Photovoltaic Specialists Conference, PVSC 2011 (pp. 2100-2104). [6186367] (Conference Record of the IEEE Photovoltaic Specialists Conference). https://doi.org/10.1109/PVSC.2011.6186367