Fabrication of silicon nanowire arrays based solar cell with improved performance

Kumar, Dinesh; Srivastava, Sanjay K.; Singh, Prashant; Husain, M.; Kumar, Vikram

doi:10.1016/j.solmat.2010.04.024

Cited by 170 publications

(101 citation statements)

References 11 publications

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“…Our black Si surfaces achieved reflections less than 1.0% over a wavelength range from 300 to 1200 nm. SiNW-based rough Si surfaces fabricated by conventional solar cell fabrication protocol, 35 including surface passivation and back surface field forming, 29,30 have been developed for solar cell integration. Similar approaches can be applied to our black Si surfaces for photovoltaic applications.…”

Section: Discussionmentioning

confidence: 99%

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Design and fabrication of broadband ultralow reflectivity black Si surfaces by laser micro/nanoprocessing

et al. 2014

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Light collection efficiency is an important factor that affects the performance of many optical and optoelectronic devices. In these devices, the high reflectivity of interfaces can hinder efficient light collection. To minimize unwanted reflection, anti-reflection surfaces can be fabricated by micro/nanopatterning. In this paper, we investigate the fabrication of broadband anti-reflection Si surfaces by laser micro/nanoprocessing. Laser direct writing is applied to create microstructures on Si surfaces that reduce light reflection by light trapping. In addition, laser interference lithography and metal assisted chemical etching are adopted to fabricate the Si nanowire arrays. The anti-reflection performance is greatly improved by the high aspect ratio subwavelength structures, which create gradients of refractive index from the ambient air to the substrate. Furthermore, by decoration of the Si nanowires with metallic nanoparticles, surface plasmon resonance can be used to further control the broadband reflections, reducing the reflection to below 1.0% across from 300 to 1200 nm. An average reflection of 0.8% is achieved.

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Section: Discussionmentioning

confidence: 99%

“…Subwavelength structures especially silicon nanowires (SiNWs) are also widely studied to achieve high light absorption in the visible and NIR range. 26,29,30 Kumar et al 29 fabricated SiNW arrays and applied them to solar cells. The maximum reflection of their black Si surface was approximately 4% between 300 and 1000 nm.…”

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confidence: 99%

Design and fabrication of broadband ultralow reflectivity black Si surfaces by laser micro/nanoprocessing

et al. 2014

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“…Several techniques including reactive ion etching (RIE) [2], plasma immersion ion implantation etching [12], metal assisted chemical etching [13] and laser-induced etching [14] have been implemented to form nanotextured Si solar cell surfaces. However, these nanotexturing processes (except for the metal assisted chemical etching process) are rather expensive.…”

Section: Introductionmentioning

confidence: 99%

Nanotextured Si Solar Cells on Microtextured Pyramidal Surfaces by Silver-assisted Chemical Etching Process

Parida¹,

Choi²,

Palei³

et al. 2015

Transactions on Electrical and Electronic Materials

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We investigated nanotextured Si solar cells using the silver-assisted chemical etching process. The nanotexturing process is very sensitive to the concentration of chemical etching solution. The high concentration process results in a nanowire formation for the nanosurfaces and causes severe surface damage to the top region of the micropyramids. These nanowires show excellent light absorption in photoreflectance spectra and radiative light emission in photoluminescence spectra. However, the low concentration process forms a nano-roughened surface and provides high minority carrier lifetimes. The nano-roughened surfaces of the samples show the improved electrical cell properties of quantum efficiency, conversion efficiency, and cell fill factor due to the reduction in the formation of the over-doped dead layer.

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“…Among the preparation methods for such nanostructures [11,12], metalassisted chemical etching is well-received as one of the viable technique to produce highly ordered Si nanostructure arrays, as this simple technique is effective and cost effective. Porous silicon nanowires (PSiNWs) prepared by metal-electroless etching technique (13,14) have been widely explored as an alternative top-down route for the fabrication of nanostructures that give visible light emission and good electronic transport properties [15,16]. In this paper, we study the morphology of PSiNWs and the optical properties of this nanostructures.…”

Section: Introductionmentioning

confidence: 99%

Effective antireflection properties of porous silicon nanowires for photovoltaic applications

Najar

Al-Jabr

Slimane

et al. 2013

2013 Saudi International Electronics, Communications and Photonics Conference

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Abstract-Porous silicon nanowires (PSiNWs) have been prepared by metal-assisted chemical etching method on the n-Si substrate. The presence of nano-pores with pore size ranging between 10-50nm in SiNWs was confirmed by electron tomography (ET) in the transmission electron microscope (TEM). The PSiNWs give strong photoluminescence peak at red wavelength. Ultra-low reflectance of <5% span over wavelength 250 nm to 1050 nm has been measured. The finite-difference time-domain (FDTD) method has been employed to model the optical reflectance for both Si wafer and PSiNWs. Our calculation results are in agreement with the measured reflectance from nanowires length of 6 µm and 60% porosity. The low reflectance is attributed to the effective graded index of PSiNWs and enhancement of multiple optical scattering from the pores and nanowires. PSiNW structures with low surface reflectance can potentially serve as an antireflection layer for Sibased photovoltaic devices.

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Fabrication of silicon nanowire arrays based solar cell with improved performance

Cited by 170 publications

References 11 publications

Design and fabrication of broadband ultralow reflectivity black Si surfaces by laser micro/nanoprocessing

Design and fabrication of broadband ultralow reflectivity black Si surfaces by laser micro/nanoprocessing

Nanotextured Si Solar Cells on Microtextured Pyramidal Surfaces by Silver-assisted Chemical Etching Process

Effective antireflection properties of porous silicon nanowires for photovoltaic applications

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