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Photocurrent enhancement of ultrathin front-textured crystalline silicon solar cells by rear-located periodic silver nanoarrays

Yan, Wensheng; Tao, Zhikuo; Gu, Min; Richards, Bryce S.

Abstract (englisch):
Ultrathin crystalline silicon solar cells are alternative technology roadmap to achieve more cost-effectiveness. However, when silicon thickness is reduced to less than 50 µm, light absorption loss becomes severe, especially in the long wavelength range of 900–1200 nm. Therefore, it is significant to investigate the enhancements of photocurrent and efficiency by improving light absorption in the long wavelength range. In this work, we design and fabricate approximately 20 µm-thick front-textured monocrystalline silicon solar cells. When periodic silver nanoarrays with precise geometries are applied to the rear of the solar cells, the measured external quantum efficiency clearly reveals an enhancement in the longer wavelengths. For our best sample, the short-circuit current density and the absolute efficiency present the enhancements of ΔJsc = 0.8 mA/cm2 and Δη = 0.6%.

Zugehörige Institution(en) am KIT Institut für Mikrostrukturtechnik (IMT)
Lichttechnisches Institut (LTI)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator DOI: 10.1016/j.solener.2017.04.046
ISSN: 0038-092X, 1471-1257
KITopen ID: 1000069226
HGF-Programm 43.23.04; LK 01
Erschienen in Solar energy
Band 150
Seiten 156–160
Bemerkung zur Veröffentlichung
Schlagworte Photovoltaic; Ultrathin crystalline silicon; Photocurrent enhancement; Silver nanoarrays; Plasmonic effect
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