Plasmonic light-trapping for Si solar cells using self-assembled, Ag nanoparticles

F. J. Beck, S. Mokkapati, K. R. Catchpole

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107 Citations (Scopus)

Abstract

We present experimental results for photocurrent enhancements in thin c-Si solar cells due to light-trapping by selfassembled, random Ag nanoparticle arrays. The experimental geometry is chosen to maximise the enhancement provided by employing previously reported design considerations for plasmonic light-trapping. The articles are located on the rear of the cells, decoupling light-trapping and anti-reflection effects, and the scattering resonances of the particles are redshifted to target spectral regions which are poorly absorbed in Si, by over-coating with TiO2.We report a relative increase in photocurrent of 10% for 22mmSi cells due to light-trapping. Incorporation of a detached mirror behind the nanoparticles increases the photocurrent enhancement to 13% and improves the external quantum efficiency by a factor of 5.6 for weakly absorbed light.

Original languageEnglish
Pages (from-to)500-504
Number of pages5
JournalProgress in Photovoltaics: Research and Applications
Volume18
Issue number7
DOIs
Publication statusPublished - 1 Nov 2010
Externally publishedYes

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