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Optical Whispering Gallery-Enabled Enhanced Photovoltaic Efficiency of CdS-CuInS 2 Thin Film-Sensitized Whisperonic Solar Cells
Perumal Ilaiyaraja, Tapan Kumar Das, Pavana S.V. Mocherla,
Published in American Chemical Society
2019
Volume: 123
   
Issue: 3
Pages: 1579 - 1586
Abstract
Composite photoanode comprising mesoporous microspheres with a smooth spherical morphology exhibiting high light scattering due to optical whispering gallery modes (WGMs) is used to fabricate whisperonic solar cell (WSC) devices. The photoanode is sensitized with CdS-CuInS 2 thin films (CdS-CIS-TF) of ∼5 nm thickness. CdS-CIS-TF-sensitized photoanodes exhibit strong coupling with WGM. These WSC devices show an average (η avg ) efficiency (η) of ≈3.2% in comparison with η avg ≈ 1.9% for the nanoparticulate-based photoanode. The observed efficiency is the highest for CdS-CIS-TF-sensitized solar cells made using I - /I 3 - electrolyte. This remarkable increase in η avg (∼60%) is attributed to increased photon absorption by the sensitizer films because of the presence of WGM scattering prevailing in smooth microspheres. Thus, WSC photoanode configuration is a promising approach to enhance the efficiency of TF-sensitized solar cells. © 2019 American Chemical Society.
About the journal
JournalData powered by TypesetJournal of Physical Chemistry C
PublisherData powered by TypesetAmerican Chemical Society
ISSN19327447
Open AccessNo
Concepts (20)
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    CADMIUM SULFIDE SOLAR CELLS
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    Efficiency
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    Electrolytes
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    Ii-vi semiconductors
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    Light scattering
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    Microspheres
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    Solar power generation
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    Thin film solar cells
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    Thin films
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    Whispering gallery modes
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    CUINS2 THIN FILMS
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    MESOPOROUS MICROSPHERES
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    Nano particulates
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    PHOTO-VOLTAIC EFFICIENCY
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    Photon absorptions
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    Spherical morphologies
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    WHISPERING GALLERY
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    Solar cells