Platinum Nanoparticle Decorated Silicon Nanowires for Efficient Solar Energy Conversion

Peng, Kui‐Qing; Wang, Xin; Wu, Xiaoling; Lee, Shuit‐Tong

doi:10.1021/nl901734e

Cited by 253 publications

(221 citation statements)

References 51 publications

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“…To improve the catalytic activity, the catalysts should possess a high specific surface area. This can be achieved by Pt nanostructures such as nanoparticles, [4][5][6] nanocubes [7][8][9] and nanorods, [10] which have become an intensive research subject for fundamental as well as applied research. [11,12] On the other hand, the small size increases aggregation and reduces the particle stability during the preparation and applications in, for example, conversion of CO to CO 2 in automobile emission, [13][14][15] redox reactions in fuel cells, [16] and biosensing.…”

Section: Introductionmentioning

confidence: 99%

1.7 nm Platinum Nanoparticles: Synthesis with Glucose Starch, Characterization and Catalysis

et al. 2010

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Monodisperse platinum nanoparticles (PtNPs) were synthesized by a green recipe. Glucose serves as a reducing agent and starch as a stabilization agent to protect the freshly formed PtNP cores in buffered aqueous solutions. Among the ten buffers studied, 2-(N-morpholino)ethanesulfonic acid (MES), ammonium acetate and phosphate are the best media for PtNP size control and fast chemical preparation. The uniform sizes of the metal cores were determined by transmission electron microscopy (TEM) and found to be 1.8 ± 0.5, 1.7 ± 0.2 and 1.6 ± 0.5 nm in phosphate, MES and ammonium acetate buffer, respectively. The estimated total diameter of the core with a starch coating layer is 5.8-6.0 nm, based on thermogravimetric analysis (TGA). The synthesis reaction is simple, environmentally friendly, highly reproducible, and easy to scale up. The PtNPs were characterized electrochemically and show high catalytic activity for reduction of dioxygen and hydrogen peroxide as well as for oxidation of dihydrogen. The PtNPs can be transferred to carbon support materials with little demand for high specific surface area of carbon. This enables utilization of graphitized carbon blacks to prepare well-dispersed Pt/C catalysts, which exhibit significantly improved durability in the accelerated aging test under fuel cell mimicking conditions.

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Section: Introductionmentioning

confidence: 99%

1.7 nm Platinum Nanoparticles: Synthesis with Glucose Starch, Characterization and Catalysis

et al. 2010

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“…[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. 17 Oxide semiconductors are promising for many applications.…”

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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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“…[5][6][7][8] For example, porous Si and Si nanowires (NWs) have been applied to solar cells to effectively reduce the reflection loss. [9][10][11] Xiu et al developed a hierarchical structure through a two-tier texturing method for lower light reflection. [12] Using an antireflection coating (ARC) is another method to reduce light reflectance via destructive interference of the reflected light at the air-ARC-substrate interfaces.…”

mentioning

confidence: 99%

Hybridizing ZnO Nanowires with Micropyramid Silicon Wafers as Superhydrophobic High‐Efficiency Solar Cells

Liu

Das

et al. 2011

Advanced Energy Materials

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A novel hierarchical structure integrating ZnO‐nanowire arrays on Si micropyramids is reported as an effective antireflection layer for improving the solar‐cell conversion efficiency. This structure displays a broadband reflection suppression with an average weighted reflectance of 3.2%. Solar cells based on the hierarchal structure show a high conversion efficiency of 16.0%, as well as a superior self‐cleaning property.

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Platinum Nanoparticle Decorated Silicon Nanowires for Efficient Solar Energy Conversion

Cited by 253 publications

References 51 publications

1.7 nm Platinum Nanoparticles: Synthesis with Glucose Starch, Characterization and Catalysis

1.7 nm Platinum Nanoparticles: Synthesis with Glucose Starch, Characterization and Catalysis

Charge injection and trapping in TiO2 nanoparticles decorated silicon nanowires arrays

Hybridizing ZnO Nanowires with Micropyramid Silicon Wafers as Superhydrophobic High‐Efficiency Solar Cells

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