Optical Properties of Metals and Alloys

Nllsson, P.O.

doi:10.1016/s0081-1947(08)60425-7

Cited by 38 publications

(1 citation statement)

References 389 publications

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“…The interband threshold of the transition metals is given by excitations of conduction band electrons to higher levels since all filled bands lie far below the conduction band [23]. This peak is independent of the size of NCs [23].…”

Section: Resultsmentioning

confidence: 99%

Improvement in the photocurrent collection due to enhanced absorption of light by synthesizing staggered layers of silver nanoclusters in silicon

Dhoubhadel¹,

Lakshantha²,

Lightbourne³

et al. 2015

AIP Conference Proceedings

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Abstract:The quest for increased efficiency of solar cells has driven the research in synthesizing photovoltaic cells involving Si based materials. The efficiency of solar cells involving crystalline Si is stalled around 25% for the last decade. Recently Shi et al. had shown that light trapping can be enhanced by fabricating double layers of Ag nanoparticles in silicon based materials. The light trapping is critically important in a photo devices such as solar cells in order to increase light absorption and efficiency. In the present work, we report enhancement in the absorption of light in Ag ion implanted Si substrates. Multiple low energies Ag ions, ranging from ~80 keV to ~30 keV, with different fluences ranging from ~1×1016 to ~1×10 17 atoms/cm 2 were sequentially implanted into commercially available Si (100) substrates followed by post-thermal annealing to create different sizes of Ag nanoclusters (NC) at different depths in the top 100 nm of the Si. The absorbance of light is increased in Ag implanted Si with a significant increase in the current collection in I-V (current-voltage) photo switching measurements. The experimental photovoltaic cells fabricated with the Agimplanted Si samples were optically characterized under AM (air mass) 1.5 solar radiation conditions (~1.0 kW/m 2 ). An enhancement in the charge collection were measured in the annealed samples, where prominent Ag NCs were formed in the Si matrix compared to the as-implanted samples with amorphous layers. We believe the enhancement of the photocurrent density from the samples with Ag NC is due to the improvement of efficiency of charge collection of e --h + pairs produced by the incident light.

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Section: Resultsmentioning

confidence: 99%