Silicon nanowires for advanced energy conversion and storage

Peng, Kui‐Qing; Wang, Xin; Li, Li; Hu, Yu; Lee, Shuit‐Tong

doi:10.1016/j.nantod.2012.12.009

Cited by 280 publications

(200 citation statements)

References 200 publications

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“…5 Surface dominated transport 6 is important in nanostructures for various device applications. [7][8][9][10] Surface passivation of nanostructures 11 by different organic and inorganic materials has been reported to tailor the sensing, optical, electrical, photodetection, and thermoelectric properties. 7,[12][13][14][15][16] Properties of SiNWs are highly dependent on density of surface states and doping level.…”

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confidence: 99%

Charge injection and trapping in TiO2 nanoparticles decorated silicon nanowires arrays

Rasool

Rafiq

Ahmad

et al. 2015

Applied Physics Letters

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We investigate carrier transport properties of silicon nanowire (SiNW) arrays decorated with TiO2 nanoparticles (NPs). Ohmic conduction was dominant at lower voltages and space charge limited current with and without traps was observed at higher voltages. Mott’s 3D variable range hoping mechanism was found to be dominant at lower temperatures. The minimum hopping distance (Rmin) for n and p-SiNWs/TiO2 NPs devices was 1.5 nm and 0.68 nm, respectively, at 77 K. The decrease in the value of Rmin can be attributed to higher carrier mobility in p-SiNWs/TiO2 NPs than that of n-SiNWs/TiO2 NPs hybrid device

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mentioning

confidence: 99%

Charge injection and trapping in TiO2 nanoparticles decorated silicon nanowires arrays

Rasool

Rafiq

Ahmad

et al. 2015

Applied Physics Letters

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“…As alternative to CVD growth a wide variety of other growth methods can be applied using catalysts [9]. Among them are the annealing in a reactive atmosphere like hydrogen to form the nanowires directly from a silicon substrate [21], laser ablation [22] and molecular beam epitaxy [23].…”

Section: Fabrication Techniques For Silicon Nanowiresmentioning

confidence: 99%

“…But also the field of energy generation and storage can benefit from the quasi 1D structure. In the solar cells the nanowires allow to more efficiently collect the incoming solar radiation [8] whereby in Li-ion batteries the structure allows for volume expansion [9].…”

Section: Introductionmentioning

confidence: 99%

Silicon Nanowires: Fabrication and Applications

Mikolajick

Weber

2015

NanoScience and Technology

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Due to the high surface to volume silicon ratio and unique quasi onedimensional electronic structure, silicon nanowire based devices have properties that can outperform their traditional counterparts in many ways. To fabricate silicon nanowires, in principle there are a variety of different approaches. These can be classified into top-down and bottom-up methods. The choice of fabrication method is strongly linked to the target application. From an application point of view, electron devices based on silicon nanowires are a natural extension of the downscaling of a silicon metal insulator semiconductor transistor. However, the unique properties also allow implementing new device concepts like the junctionless transistor and new functionalities like reconfigurability on the device level. Sensor devices may benefit from the high surface to volume ratio leading to a very high sensitivity of the device. Also, solar cells and anodes in Li-ion batteries can be improved by exploiting the quasi one-dimensionality. This chapter will give a review on the state-of-the-art of silicon nanowire fabrication and their application in different types of devices.

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“…30 Other than TiSi 2 nanonets, silicon NW arrays have also been employed as high-quality, 1-D conducting channels for rapid electron-hole separation and charge transport. 46 Among the studied materials for PEC water splitting, TiO 2 stands out for its high incident photon-to-electron-conversion efficiencies and remarkable chemical stability. 9,10 To simultaneously enhance the chemical stability of Si NWs, TiO 2 was chosen by Shi and co-workers as a corrosion-resistive material to interface with electrolyte other than a functional PEC photoelectrode component.…”

Section: Branched Nanostructures For Photoelectrochemical Water Splitmentioning

confidence: 99%

Branched nanostructures for photoelectrochemical water splitting

Mao¹

2014

Nanomaterials and Energy

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IntroductionSunlight is a free, non-polluting and abundant renewable source of clean energy. The amount of solar energy that strikes the Earth yearly is ~10,000 times the total energy that is consumed on our planet. Converting solar energy into other easily usable forms has attracted considerable interest in the last several decades. Among different solar energy conversion technologies, photoelectrolysis has the ability to split water through solar energy to produce hydrogen (a chemical fuel) without any emission of by-products.1-6 The demonstration of metal oxides as photoanodes for photoelectrochemical (PEC) water splitting was pioneered in 1972 by However, the conversion efficiency today remains unsatisfactory, even lower than that of photovoltaics (PVs), and is limited mainly by the low performance of PEC electrodes. An efficient PEC cell requires electrode materials that can provide rapid charge transfer at the electrode/electrolyte interface, long-term stability and efficient harvesting of a wide range of the solar spectrum, and that are low-cost and non-toxic as well. In the last several decades, however, no breakthroughs on PEC electrode materials have been achieved yet in either the material design of photoelectrode or material stability. 10With recent advances in nanoscience and nanotechnology, nanomaterials and their designs should be promising candidates for constructing photoelectrodes because of their extremely small feature size, large surface area, large surface-to-volume ratio and short diffusion length for carrier transport. 1,3,7,10 It is believed that nanostructured materials can provide beneficial effects including quantum dot sensitisation, band structural modification, the domination of crystal facets and plasmonic association. Therefore, to develop better photoelectrodes and more efficient PEC and PV devices, one of the main strategies is nanostructuring by exploiting scaling laws and specific effects at the nanoscale to enhance the efficiency of existing semiconductors and metal oxides. As a result, there has been intensive research directed worldwide by taking advantages of nanomaterials to make PEC devices with higher solar-to-hydrogen conversion efficiency.It is well known that specific surface area, defined by surface-tovolume ratio, depends on feature size and geometry. The surface-tovolume ratio is, to a first-order approximation, inversely proportional to the feature size as 1/r.11 Highly symmetric objects, such as spheres, have low specific surface area. With equal volume, a rod has a larger surface-to-volume ratio than a spherical particle, and

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Silicon nanowires for advanced energy conversion and storage

Cited by 280 publications

References 200 publications

Charge injection and trapping in TiO2 nanoparticles decorated silicon nanowires arrays

Charge injection and trapping in TiO2 nanoparticles decorated silicon nanowires arrays

Silicon Nanowires: Fabrication and Applications

Branched nanostructures for photoelectrochemical water splitting

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