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Proceedings Paper

Local characterization of light trapping effects of metallic and dielectric nanoparticles in ultra-thin Cu(In,Ga)Se2 solar cells via scanning near-field optical microscopy
Author(s): Min Song; Guanchao Yin; Paul Fumagalli; Martina Schmid
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Paper Abstract

Plasmonic and photonic nanoparticles have proven beneficial for solar cells in the aspect of light management. For improved exploitation of nanoparticles in solar cells, it is necessary to reveal the absorption enhancement mechanism from the nanoparticles. In this study, we investigated the nanoparticle-enhanced solar cells in near-field regime with optic and opto-electric scanning near-field optical microscopy (SNOM). The near-field distribution of regularly arranged silver and polystyrene nanoparticles produced by nanosphere lithography on Cu(In,Ga)Se2 (CIGSe) solar cells is characterized using a custom-built SNOM, which gives insight into the optical mechanism of light trapping from nanoparticles to solar cells. On the other hand, the photocurrent of CIGSe solar cells with and without nanoparticles is studied with an opto-electric SNOM by recording the photocurrent during surface scanning, further revealing the opto-electrical influences of the nanoparticles. In addition, finite element method simulations have been performed and agree with the results from SNOM. We found the dielectric polystyrene spheres are able to enhance the absorption and benefit the generation of charge carriers in the solar cells.

Paper Details

Date Published: 20 February 2017
PDF: 8 pages
Proc. SPIE 10114, Quantum Dots and Nanostructures: Growth, Characterization, and Modeling XIV, 101140S (20 February 2017); doi: 10.1117/12.2253223
Show Author Affiliations
Min Song, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH (Germany)
Freie Univ. Berlin (Germany)
Guanchao Yin, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH (Germany)
Paul Fumagalli, Freie Univ. Berlin (Germany)
Martina Schmid, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH (Germany)
Freie Univ. Berlin (Germany)


Published in SPIE Proceedings Vol. 10114:
Quantum Dots and Nanostructures: Growth, Characterization, and Modeling XIV
Diana L. Huffaker; Holger Eisele, Editor(s)

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