High efficiency and stable hydrogenated amorphous silicon radial junction solar cells built on VLS-grown silicon nanowires

Misra, Soumyadeep; Yu, Linwei; Foldyna, Martin; Cabarrocas, Pere Roca i

doi:10.1016/j.solmat.2013.07.036

Cited by 117 publications

(116 citation statements)

References 34 publications

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“…S ilicon nanowires (SiNWs) are popular building blocks for developing a new generation of high-performance transistors 1,2 , sensors 3 and solar cells [4][5][6] . The use of nanoscale metal particles as a molten soft agent to absorb precursors and precipitate crystalline SiNWs (c-SiNWs) has enabled the fabrication of SiNWs at relatively low temperatures.…”

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confidence: 99%

Incorporation and redistribution of impurities into silicon nanowires during metal-particle-assisted growth

et al. 2014

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The incorporation of metal atoms into silicon nanowires during metal-particle-assisted growth is a critical issue for various nanowire-based applications. Here we have been able to access directly the incorporation and redistribution of metal atoms into silicon nanowires produced by two different processes at growth rates ranging from 3 to 40 nm s À 1 , by using laser-assisted atom probe tomography and scanning transmission electron microscopy. We find that the concentration of metal impurities in crystalline silicon nanowires increases with the growth rate and can reach a level of two orders of magnitude higher than that in their equilibrium solubility. Moreover, we demonstrate that the impurities are first incorporated into nanowire volume and then segregate at defects such as the twin planes. A dimer-atominsertion kinetic model is proposed to account for the impurity incorporation into nanowires.

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confidence: 99%

Incorporation and redistribution of impurities into silicon nanowires during metal-particle-assisted growth

et al. 2014

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“…[55][56][57] Cabarrocas et al reported ultra-thin Sn layers that were evaporated on top of the substrate and applied H 2 plasma treatment at 180 o C to form Sn catalyst droplet. 59 Droplets act as catalyst to facilitate the growth of Si nanowires at total gas pressure of 600 mTorr and RF power density of 50 mW/cm 2 .Si nanowires which have a diameter of around 80 nm and enhanced strong light trapping capability more than 90% within 1.7 µm Si in 300 to 700 nm of wavelength range. Moreover, the density of Si nanowires played an important role in light absorption because higher light absorption was detected as density of Si nanowires increases.…”

Section: Nanowire Structures (Bottom-up Method)mentioning

confidence: 99%

“…Moreover, the density of Si nanowires played an important role in light absorption because higher light absorption was detected as density of Si nanowires increases. 58,59 Falk et al demonstrated the sputtered Au layer which has thickness of 2 nm and heated the sample to 700 o C for making catalytic droplet. As a result of this experiment, nanowires were fabricated with the mean diameter of 80 nm, and these nanowires demonstrated more than 90% enhancement of light absorption within 1.5 µm Si in the wavelength region below 1000 nm.…”

Section: Nanowire Structures (Bottom-up Method)mentioning

confidence: 99%

Nanostructuring methods for enhancing light absorption rate of Si-based photovoltaic devices: A review

Hong

Bae

Koo

et al. 2014

Int. J. of Precis. Eng. and Manuf.-Green Tech.

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In recent years, there has been growing consideration of renewable energy especially photovoltaic devices. A silicon (Si) based solar cell is the most popularly and frequently considered among the photovoltaic devices, but its bulk thickness issue lowers the performance and hinders widespread application due to the material cost. Also, this thick nature causes difference in length between minority carrier diffusion and sufficient light absorption. To mitigate the issues there have been many recent studies on Si photovoltaic devices adopting nanostructuring strategies to enhance the performance. Therefore, we report two different approaches on recent nanostructuring techniques for photovoltaic devices; bottom-up and top-down processes, which are composed of vapor-liquid-solid, solution-liquid-solid, reactive ion etching with Langmuir Blodgett and metal assisted chemical etching. Those fabrication processes enable the fabrication of nanostructures with a highly ordered and alignment structures leading to enhance the light absorption and have an appropriate thickness of Si substrate regressing Auger recombination. The fabricated nanowire and nanocone array structures outperform existing results with light absorption exceeding 90%.

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“…These include dye sensitised solar cells (DSSC) [9], inorganic and organic solar cells (OSC) [2,3,8,10], and various other hybrid systems [2,3]. Widespread and most commercially successful systems are inorganic solar cells; specifically silicon based, and these can be monocrystalline [11], polycrystalline [12], or amorphous [13]. These types of solar cells are made from very reliable and advanced processing technologies, and have been reported to have relatively high efficiency rates [2,14].…”

Section: Introductionmentioning

confidence: 99%

Low temperature synthesis of multiwalled carbon nanotubes and incorporation into an organic solar cell

Mugadza

Nyamori

Mola

et al. 2017

Journal of Experimental Nanoscience

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Metal nanoparticle (MNP) catalysts used for the synthesis of multiwalled carbon nanotubes (MWCNTs) consisted of single metals (Fe, Ni or Co) and bimetallic mixture (CoFe, NiFe or NiCo). MWCNTs were successfully synthesised at 200 C in 10 min using liquefied petroleum gas as carbon source with non-equilibrium plasma enhanced chemical vapour deposition (PECVD) method. The nanostructures and the morphology of the MNPs and the MWCNTs film were characterised using relevant microscopic and spectroscopic methods. The synthesised MWCNTs were used as part of the electrode material in organic solar cell (OSC) set-up. Poly (3,4-ethylenedioxythiophene): polystyrene sulfonate (PEDOT: PSS) was used as an electron transporter and poly-3-hexyl thiophene (P3HT) as an electron donor. The performance of OSC devices was tested using standard electrical measurements and solar simulator operating at 100 mW/cm 2 . The measured power conversion efficiencies was found to be dependent on the metal catalyst used during synthesis. Among all the catalysts employed in this investigation, the best device performance was found from the synthesis of MWCNTs using Fe as a catalyst followed by Co and then Ni, respectively.

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High efficiency and stable hydrogenated amorphous silicon radial junction solar cells built on VLS-grown silicon nanowires

Cited by 117 publications

References 34 publications

Incorporation and redistribution of impurities into silicon nanowires during metal-particle-assisted growth

Incorporation and redistribution of impurities into silicon nanowires during metal-particle-assisted growth

Nanostructuring methods for enhancing light absorption rate of Si-based photovoltaic devices: A review

Low temperature synthesis of multiwalled carbon nanotubes and incorporation into an organic solar cell

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