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A note on the Hall mobility and carrier concentration

2 天前  Abstract This note presents results on Hall effect characteristics (mobility and density of majority charge carriers) of undoped p-type and n-doped pyrite thin films. Carrier mobilities between 200 and 0.07 cm 2 / V s have been measured in undoped p-type films. Doped n-type films present values which vary from 200 to 0.1 cm 2 / V s . The corresponding carrier densities change from 2×10 18 to

Transition metal doped pyrite (FeS2) thin films

Copper doped pyrite (Cu x Fe 1−x S 2) thin films deposited at 350 °C using precursors (1) and varying concentration of (4) (0.05 mol%, 0.1 mol%, 0.15 mol%, 0.20 mol%, 0.25 mol%, 0.30 mol%) show broad emission peaks in the range of 390–400 nm (Fig. S12, ESI †).

Growth of Single-Crystal Pyrite Films by Atmospheric

The pyrite films deposited onto Si(100) substrates at 673 K have smooth shinny metallic surfaces free from cracks. It was observed that the carrier concentration and Hall mobility of the films at...

Patent Report: US9880173 Pyrite shrink-film

2019-6-13  Pyrite shrink-film laminate as a hydroxyl radical generator Updated Time 12 June 2019 Patent Registration Data. Publication Number. US9880173. Application Number. US14/980408. Application Date. 28 December 2015. Publication Date. 30 January 2018. Current Assignee.

FeS2 (Pyrite) PVEducation

Band structure and carrier concentration. Graph on the amount of photo-generated carriers as a function of thickness of the planar pyrite and silicon film may be found in Pietro P. Altermatt et al. 5 Graph of Majority carrier mobility as a function of majority carrier density of natural and synthetic pyrite crystals and of pyrite thin films can be found in Pietro P. Altermatt, Tobias

Photoeffects in cobalt doped pyrite (FeS2) films

1999-7-2  Compared to the undoped p-type pyrite films, the cobalt-diffused films exhibit a much higher photoconductivity, as revealed by time resolved microwave conductivity analysis. From Hall and conductivity measurements a charge carrier concentration of about 10 20 cm −3 and a Hall mobility of about 1.5 cm 2 / (V s) was calculated.

Surface Oxidation of Pyrite as a Function of pH

2019-5-25  Pyrite, the most abundant metal sulfide at the surface of Earth, plays a key role in many processes such as acid mine drainage, redox cycling of metals at oxic-anoxic boundaries of lake bottom, and degradation of pollutants. The oxidation of pyrite was studied in batch experiments over a large range of pH (2.5−12), with trace oxygen. Surface analysis of the samples was performed using X-ray

Pyrite Wikipedia

2020-12-11  Pyrite remains in commercial use for the production of sulfur dioxide, for use in such applications as the paper industry, and in the manufacture of sulfuric acid. Thermal decomposition of pyrite into FeS (iron(II) sulfide) and elemental sulfur starts at 540 °C (1,004 °F); at around 700 °C (1,292 °F), p S 2 is about 1 atm.

Study on the Protective Film Formed from Pyrite on

The protective film formed from pyrite on the surface of carbon steel was studied in aqueous H2S so as to clarify its rapid-formation mechanism and the technological process needed for. A series of experiments were thus carried out,with XRD and SEM techniques used for morphological examination, to make sure the phases of various products from the corrosive iron sulphide in Fe-H2S-H2O system

Pyrite films grown by sulfurizing precursive iron of different

2007-11-30  The pyrite films are composed of a surface layer with coarse columnar grains and a bottom layer with fine equiaxed grains. With the increase of iron grain scale, the carrier concentration decreases and the carrier mobility increases.

FeS2 (Pyrite) PVEducation

Band structure and carrier concentration. Graph on the amount of photo-generated carriers as a function of thickness of the planar pyrite and silicon film may be found in Pietro P. Altermatt et al. 5 Graph of Majority carrier mobility as a function of majority carrier density of natural and synthetic pyrite crystals and of pyrite thin films can be found in Pietro P. Altermatt, Tobias

Iron Pyrite Thin Film Counter ARTICLE Electrodes for Dye

2020-9-26  Iron Pyrite Thin Film Counter Electrodes for Dye-Sensitized Solar Cells: High Efficiency for Iodine and Cobalt Redox Electrolyte Cells Sudhanshu Shukla,†,‡ Nguyen Huu Loc,§ Pablo P. Boix,§ Teck Ming Koh,§ Rajiv Ramanujam Prabhakar,‡ Hemant K. Mulmudi,§ Jun Zhang,) Shi Chen,) Chin Fan Ng,) Cheng Hon Alfred Huan,) Nripan Mathews,‡

Patent Report: US9880173 Pyrite shrink-film

2019-6-13  Pyrite shrink-film laminate as a hydroxyl radical generator Updated Time 12 June 2019 Patent Registration Data. Publication Number. US9880173. Application Number. US14/980408. Application Date. 28 December 2015. Publication Date. 30 January 2018. Current Assignee.

Transition metal doped pyrite (FeS 2 ) thin films

First published on 30th October 2015. Iron pyrite (FeS 2) is a semiconductor comprised of earth-abundant elements and has the potential to be a low cost photovoltaic material with comparatively low toxicity.The properties of transition metal doped iron pyrite thin films (M x Fe 1− x S 2 where M = Co, Ni, Cu, or Zn) deposited by aerosol-assisted chemical vapour deposition (AACVD) on various

Investigation of Photocarrier Losses in Pyrite (FeS2) Film

2018-12-18  details are described in our previous publications [11,23]. 50 μL suspension of pyrite in ethanol, at a concentration of 0.1M, was used to spin-coat on glass substrate. The coating was done sequentially to get adequate film thickness of about 300 nm. This is termed the as-prepared film.

Surface Oxidation of Pyrite as a Function of pH

2019-5-25  Pyrite, the most abundant metal sulfide at the surface of Earth, plays a key role in many processes such as acid mine drainage, redox cycling of metals at oxic-anoxic boundaries of lake bottom, and degradation of pollutants. The oxidation of pyrite was studied in batch experiments over a large range of pH (2.5−12), with trace oxygen. Surface analysis of the samples was performed using X-ray

Stability, Structure, and Electronic Properties of the

2018-1-17  Stability, Structure, and Electronic Properties of the Pyrite/Arsenopyrite Solid–Solid Interface–A DFT Study

Pyrite oxidation under simulated acid rain weathering

2017-7-31  We investigated the electrochemical corrosion behavior of pyrite in simulated acid rain with different acidities and at different temperatures. The cyclic voltammetry, polarization curve, and electrochemical impedance spectroscopy results showed that pyrite has the same electrochemical interaction mechanism under different simulated acid rain conditions, regardless of acidity or

FeS2 (Pyrite) PVEducation

Band structure and carrier concentration. Graph on the amount of photo-generated carriers as a function of thickness of the planar pyrite and silicon film may be found in Pietro P. Altermatt et al. 5 Graph of Majority carrier mobility as a function of majority carrier density of natural and synthetic pyrite crystals and of pyrite thin films can be found in Pietro P. Altermatt, Tobias

Study on the Protective Film Formed from Pyrite on

The protective film formed from pyrite on the surface of carbon steel was studied in aqueous H2S so as to clarify its rapid-formation mechanism and the technological process needed for. A series of experiments were thus carried out,with XRD and SEM techniques used for morphological examination, to make sure the phases of various products from the corrosive iron sulphide in Fe-H2S-H2O system

Pyrite films grown by sulfurizing precursive iron of different

2007-11-30  The pyrite films are composed of a surface layer with coarse columnar grains and a bottom layer with fine equiaxed grains. With the increase of iron grain scale, the carrier concentration decreases and the carrier mobility increases.

Thin film preparation of semiconducting iron pyrite

Pyrite (Fe52) has been investigated as a promising new absorber material for thin film solar cell applications because of its high optical absorption coefficient of 1OL cm1, and its bandgap of 0.9 to 1.0 eV. Thin layers have been prepared by Metal Organic Chemical Vapor Deposition, MOCVD, Chemical Spray Pyrolysis, CSP, Chemical Vapor Transport, CVT, and Sulfurization of Iron Oxide films, 510

Protein footprinting by pyrite shrink-wrap laminate

A thin film of pyrite (cubic FeS 2) nanocrystals deposited onto a shape memory polymer (commodity shrink-wrap film) generates sufficient ·OH via Fenton chemistry for oxidative footprinting analysis of proteins. We demonstrate that varying either time or H 2 O 2 concentration yields the required ·OH dose-oxidation response relationship. A

Preparation and characterization of cobalt-doped iron pyrite

2020-6-16  The X-ray diffraction results indicated that the synthesized powder and thin films showed a cubic pyrite structure. The crystallinity of FeS2 was slightly degraded by the doping of cobalt. The dependence of thin-film resistance on the temperature indicated an increase of activation energy until 3 at% cobalt doping and then decreased the resistance with the increase of cobalt concentration.

Surface Oxidation of Pyrite as a Function of pH

2019-5-25  Pyrite, the most abundant metal sulfide at the surface of Earth, plays a key role in many processes such as acid mine drainage, redox cycling of metals at oxic-anoxic boundaries of lake bottom, and degradation of pollutants. The oxidation of pyrite was studied in batch experiments over a large range of pH (2.5−12), with trace oxygen. Surface analysis of the samples was performed using X-ray

Stability, Structure, and Electronic Properties of the

2018-1-17  Stability, Structure, and Electronic Properties of the Pyrite/Arsenopyrite Solid–Solid Interface–A DFT Study

Pyrite oxidation under simulated acid rain weathering

2017-7-31  We investigated the electrochemical corrosion behavior of pyrite in simulated acid rain with different acidities and at different temperatures. The cyclic voltammetry, polarization curve, and electrochemical impedance spectroscopy results showed that pyrite has the same electrochemical interaction mechanism under different simulated acid rain conditions, regardless of acidity or