Fabrication of Si nanoparticles from Si swarf and application to solar cells

Maeda, Masanori; Imamura, Kentaro; Matsumoto, Tetsuya; Kobayashi, Hikaru

doi:10.1016/j.apsusc.2014.02.131

Cited by 51 publications

(22 citation statements)

References 26 publications

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“…Nanotexturing of substrates has been widely studied, as it will reduce broad-band anti-reflection effectively and increase light trapping effects. A variety of techniques for fabricating anti-reflection nanostructures [3,4] are being studied. Some approaches involve conventional wet etching [5].…”

Section: Introductionmentioning

confidence: 99%

0.76% absolute efficiency increase for screen-printed multicrystalline silicon solar cells with nanostructures by reactive ion etching

Chen

Hong

2016

Solar Energy Materials and Solar Cells

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Section: Introductionmentioning

confidence: 99%

0.76% absolute efficiency increase for screen-printed multicrystalline silicon solar cells with nanostructures by reactive ion etching

Chen

Hong

2016

Solar Energy Materials and Solar Cells

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“…Two kinds of starting materials were used to produce Si nanopowder, (i) -commercial Si powder with 5 µm size (Koujundo Chemical Laboratory Si 3N Powder), and (ii) -Si swarf generated during slicing Si ingots to produce Si wafers for solar cell use [11][12][13][14][15]. Si nanopowder was fabricated by the beads milling method.…”

Section: Methodsmentioning

confidence: 99%

“…We have developed a simple method to produce Si nanopowder by use of the beads milling method [11][12][13][14][15]. Produced Si nanopowder can be applied to solar cells [11], hydrogen generation material [12], anode material in Li ion batteries [13], and light emitting material [14][15].…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of Si nanopowder and application to hydrogen generation and photoluminescent material

Kobayashi

Imamura

Matsumoto

et al. 2017

Journal of Electrical Engineering

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Si nanopowder is fabricated using the simple beads milling method. Fabricated Si nanopowder reacts with water in the neutral pH region between 7 and 9 to generate hydrogen. The hydrogen generation rate greatly increases with pH, while pH does not change after the hydrogen generation reaction. In the case of the reactions of Si nanopowder with strong alkaline solutions (eg pH13.9), 1600 mL hydrogen is generated from 1 g Si nanopowder in a short time (eg 15 min). When Si nanopowder is etched with HF solutions and immersed in ethanol, green photoluminescence (PL) is observed, and it is attributed to band-to-band transition of Si nanopowder. The Si nanopowder without HF etching in hexane shows blue PL. The PL spectra possess peaked structure, and it is attributed to vibronic bands of 9,10-dimethylantracene (DMA) in hexane solutions. The PL intensity is increased by more than 3,000 times by adsorption of DMA on Si nanopowder.

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“…on the other hand, melted kerf to make solar panels and showed the devastating effect that carbon contamination has on the efficiency of the so formed devices. Finally, Maeda et al 18. reported improvements in solar panel efficiency from recycled kerf by milling kerf and heating it in inert gas to remove carbon.…”

mentioning

confidence: 99%

Carbon elimination from silicon kerf: Thermogravimetric analysis and mechanistic considerations

Vazquez‐Pufleau

Chadha

Yablonsky

et al. 2017

Sci Rep

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40% of ultrapure silicon is lost as kerf during slicing to produce wafers. Kerf is currently not being recycled due to engineering challenges and costs associated with removing its abundant impurities. Carbon left behind from the lubricant remains as one of the most difficult contaminants to remove in kerf without significant silicon oxidation. The present work enables to better understand the mechanism of carbon elimination in kerf which can aid the design of better processes for kef recycling and low cost photovoltaics. In this paper, we studied the kinetics of carbon elimination from silicon kerf in two atmospheres: air and N2, under a regime of no-diffusion-limitation. We report the apparent activation energy in both atmospheres using three methods: Kissinger, and two isoconversional approaches. In both atmospheres, a bimodal apparent activation energy is observed, suggesting a two stage process. A reaction mechanism is proposed in which (a) C-C and C-O bond cleavage reactions occur in parallel with polymer formation; (b) at higher temperatures, this polymer fully degrades in air but leaves a tarry residue in N2 that accounts for about 12% of the initial total carbon.

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Fabrication of Si nanoparticles from Si swarf and application to solar cells

Cited by 51 publications

References 26 publications

0.76% absolute efficiency increase for screen-printed multicrystalline silicon solar cells with nanostructures by reactive ion etching

0.76% absolute efficiency increase for screen-printed multicrystalline silicon solar cells with nanostructures by reactive ion etching

Fabrication of Si nanopowder and application to hydrogen generation and photoluminescent material

Carbon elimination from silicon kerf: Thermogravimetric analysis and mechanistic considerations

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