Ionic-passivated FeS2 photocapacitors for energy conversion and storage

Gong, Maogang; Kirkeminde, Alec; Kumar, Nardeep; Zhao, Hui; Ren, Shenqiang

doi:10.1039/c3cc45088k

Cited by 42 publications

(20 citation statements)

References 24 publications

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“…Pyrite has wide area of applications (Figure ) such as energy storage and conversion field: photovoltaics,, photocatalytic hydrogen production, batteries, supercapacitors, photocapacitors, thermoelectricity;, electronics,, optoelectronics, spintronics; environmental applications; hydrogenation; sensors; agriculture, and emerging biomedical field …”

Section: Introductionmentioning

confidence: 99%

Nanocrystalline Pyrite for Photovoltaic Applications

et al. 2018

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Transition metal sulfides (TMSs) are of special interest in energy conversion and storage devices. Amongst all sulfides, fool's gold or iron pyrite (FeS 2 ) is potentially an attractive candidate for photovoltaic applications. Iron pyrite has risen to prominence due to its distinct properties and abundance in nature to meet the large scale needs. It is considered as environmentally benign solar absorber material with high absorption coefficient, α > 6 x10 5 cm À 1 for λ � 700 nm and suitable energy bandgap (E g = 0.95 eV). Numerous physical and chemical methods have been employed to deposit nanocrystalline pyrite thin films directly from source materials or indirectly by sulfuration. This review gives an overview of pyrite as a low cost photovoltaic absorber material for contemporary solar cell structures. In addition, practical approaches like the rational design of nanocomposites, band gap engineering and nanostructure synthesis of pyrite for improving its properties particularly photovoltaic properties are also deliberated. Moreover, limitations, challenges, remedies and prospects of pyrite as potential photovoltaic material are also reviewed to further advance the development of pyrite-based solar cell configurations.[a] Dr.at a low precursor concentration, pyrite nanocubes (125-250 nm in 20-180 min) were obtained due to low nuclei concentration and slow growth (diffusion limited) in quasiequilibrium. The anisotropic structures nanodendrites were 2 3 4 5 6 7 8

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Section: Introductionmentioning

confidence: 99%

Nanocrystalline Pyrite for Photovoltaic Applications

et al. 2018

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“…Implementing FeS 2 nanocrystals to optoelectronics is by no means trivial due to the presence of nonideal surface layer ascribing to the surface defect states and long insulating alkyl chain ligands attached to the FeS 2 nanocrystals in the processes developed for synthesis of high crystalline samples . Consequently, the reported optoelectronic device performance is poor with low photoresponsivity of only a few A W −1 (or low quantum efficiency) and slow response (response time on the order of hundreds of seconds) due to charge transfer blocking and charge trapping by the nonideal surface of the FeS 2 nanocrystals .…”

mentioning

confidence: 99%

“…In this van der Waals heterojunction device structure, the FeS 2 NCs (or QDs) are photosensitizers, which take the advantages of the high light absorption coefficient of FeS 2 . In the nanocube (NC) and quantum dot (QD) forms, the reduced sample dimension provides a strong quantum confinement, leading to further enhanced the light–solid interaction, and exciton (electron–hole pairs generated by the light excitation) lifetime and hence photoconductive gain . When combined with graphene that has an extraordinary charge mobility, high photoconductive gain up to 10 8 –10 9 can be achieved as shown recently in PbS QDs/graphene and ZnO/graphene heterojunction nanohybrids.…”

mentioning

confidence: 99%

Broadband Photodetectors Enabled by Localized Surface Plasmonic Resonance in Doped Iron Pyrite Nanocrystals

Gong

Sakidja

et al. 2018

Advanced Optical Materials

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The emerging capability to detect light over a broad spectral range is a key to technological applications in sensing, spectroscopy, imaging and communications. Colloidal semiconductor nanocrystal/graphene van der Waals heterojunctions provide a unique scheme that combines the spectral tunability and strong quantum confinement of the semiconductor nanocrystals sensitizers with superior charge mobility of graphene for extraordinary photoconductive gains. While high responsivity has been demonstrated, the spectral range is typically narrow limited by the cutoff of the semiconductor band gap of the nanocrystals. Here, a broadband photosensitizer is reported, based on doped Iron Pyrite nanocubes (FeS2 NCs) that exhibit strong localized surface plasmonic resonance (LSPR) spanning across ultraviolet through visible to near‐infrared (UV–Vis–NIR). Using the printed LSPR FeS2 NCs/graphene van der Waals heterostructure, a broadband UV–Vis–NIR photoresponsivity in exceeding 1.08 × 106 A/W has been demonstrated through development of a ligand‐exchange process to facilitate efficient charge transfer at the LSPR FeS2 NCs/graphene interface. This result demonstrates the viability of the LSPR semiconductor nanocrystal/graphene van der Waals heterostructure for high‐performance broadband optoelectronics with scalability through direct printing.

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“…The easiness in synthesis, deposition and fabrication of thin films by such chemical routes, place the metal chalcogenides and selenides in a better position over silicon as the absorbing layer in such devices. Iron pyrite (FeS 2 ) is regarded as one of the suitable candidate in this regard, due to its strong absorption [2], low cost, suitable band gap in the range of 0.9-1.2 eV [3][4][5] and high elemental abundance on earth crust.…”

Section: Introductionmentioning

confidence: 99%

“…The highest reported efficiency for a pyrite based solar cell is 2.8 % [5][6][7]. A pyrite cell is considered four times as economical as a silicon cell with similar efficiencies [7].…”

Section: Introductionmentioning

confidence: 99%

Low temperature synthesis of iron pyrite nanorods for photovoltaic applications

Jayalakshmi

Bhat

2015

J Mater Sci: Mater Electron

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Iron pyrite is gaining reputation amongst the various alternatives for silicon as the photovoltaic material in solar cells due to its low cost, strong absorption and relatively high abundance of its constitutional elements. The synthesis of iron pyrite nanoparticles by existing hydrothermal methods with precise control over size, shape and stoichiometry is a difficult task due to the difficulty in controlling the parameters at a higher temperature. Here, we report a novel synthesis method for obtaining iron pyrite nanorods through a low temperature process in a stirred container which is scalable for the large scale industrial production. The nanorods synthesized by the new method consisted of single phase pyrite, possessing an optical band gap of about 1.13 eV. The overall mechanism of nanorod formation is explained by the La Mer model as well as the oriented attachment model.

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Ionic-passivated FeS2 photocapacitors for energy conversion and storage

Cited by 42 publications

References 24 publications

Nanocrystalline Pyrite for Photovoltaic Applications

Nanocrystalline Pyrite for Photovoltaic Applications

Broadband Photodetectors Enabled by Localized Surface Plasmonic Resonance in Doped Iron Pyrite Nanocrystals

Low temperature synthesis of iron pyrite nanorods for photovoltaic applications

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