Efficient light-trapping nanostructures in thin silicon solar cells

Han, Sang Eon; Mavrokefalos, Anastassios; Branham, Matthew S.; Chen, Gang

doi:10.1117/12.881047

Cited by 7 publications

(3 citation statements)

References 25 publications

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“…Besides Si nanowires, rods and cones, there have been studies with nanoholes, pyramids, hemispheres for a better light absorption in solar cells. Si tubular structures are achieved by Si thin layer deposition over various templates and followed by removal of the template .…”

Section: Comparison Of the Photovoltaic Parameters Of Hybrid Solar Cementioning

confidence: 99%

Enhanced Light Absorption of Silicon Nanotube Arrays for Organic/Inorganic Hybrid Solar Cells

et al. 2014

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By combining nanoimprint lithography technique and a two-step lift-off process, a Si nanotube array is fabricated and applied as a light absorber for n-Si/PEDOT:PSS hybrid solar cells. The light is effectively trapped within the nanotubes and the device reveals a Jsc of 29.9 mA · cm(-2) and a power conversion efficiency of 10.03%, which is an enhancement of 13.4% compared to the cell having the best-known Si architecture of nanocones as a light absorber to date.

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Section: Comparison Of the Photovoltaic Parameters Of Hybrid Solar Cementioning

confidence: 99%

Enhanced Light Absorption of Silicon Nanotube Arrays for Organic/Inorganic Hybrid Solar Cells

et al. 2014

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“…Standard methods based on random texturing or randomly distributed pyramid structures can provide light trapping enhancement up to a theoretical limit expressed as 4n 2 , also known as the Yablonovitch limit [6]. This theoretical limit, deduced from the ray optics and later related to the mode density [7], can be overcome using the more profound concepts based on the wave optics [8][9]. There are many possibilities to improve light trapping efficiency based on concepts of gratings, photonics crystals, or sharp features that can lead to so called "black silicon".…”

Section: Introductionmentioning

confidence: 98%

Light trapping enhancement in ordered and disordered silicon nanowire based solar cells

Misra

Cabarrocas

2013

SPIE Proceedings

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In this work we introduce the main principles behind efficient light trapping in silicon nanowire structures. The ultimate performance of vertical periodic crystalline silicon nanowire arrays has been determined and optimized values have been presented as a function of the nanowire length. The further improvement of the performance has been demonstrated using dual-diameter periodic silicon nanowire arrays where the already optimized nanowire structure has been used as the starting point. The improved efficiency of this densely packed structure has been compared with the reference flat films in order to evaluate theoretical improvement of the light trapping efficiency. In the last part of our work we present the efficient light trapping inside amorphous silicon nanowire based radial junction solar cells fabricated using plasma enhanced vapor-liquid-solid process.

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“…4, 5 However, we can overcome this limit using concepts based on wave optics. 6,7 Solar cells featuring nanowires with p-n junctions constructed in a radial direction have high light-trapping efficiency 8 and enhanced charge collection. This is because radial charge separation requires a shorter carrier diffusion length than for planar junction arrangements.…”

mentioning

confidence: 99%