Studies on deposition of Fe2O3 films by spray pyrolysis method

Pawar, Sumod; Pawar, S.H.

doi:10.1016/0025-5408(83)90083-1

Cited by 9 publications

(2 citation statements)

References 7 publications

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“…Such an E a value is slightly higher than Ti-doped Fe 2 O 3 (0.12 eV) and lower than Si-doped Fe 2 O 3 (0.34 eV) . We were not able to obtain E a for undoped Fe 2 O 3 , but the literature has reported that undoped Fe 2 O 3 has a much higher activation energy of 0.52 eV, 0.569 eV, and 0.7 eV, etc. The lower E a value upon doping is first explained by Morin …”

Section: Resultsmentioning

confidence: 57%

Electronic Structure, Optical Properties, and Photoelectrochemical Activity of Sn-Doped Fe₂O₃ Thin Films

Tian

Lin

et al. 2020

J. Phys. Chem. C

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Hematite (Fe 2 O 3 ) is a well-known oxide semiconductor suitable for photoelectrochemical (PEC) water splitting and industry gas sensing. It is widely known that Sn doping of Fe 2 O 3 can enhance the device performance, yet the underlying mechanism remains elusive. In this work, we determine the relationship between electronic structure, optical properties, and PEC activity of Sn-doped Fe 2 O 3 by studying highly crystalline, wellcontrolled thin films prepared by pulsed laser deposition (PLD). We show that Sn doping substantially increases the n-type conductivity of Fe 2 O 3 , and the conduction mechanism is better described by a small-polaron hopping (SPH) model. Only 0.2% Sn doping significantly reduces the activation energy barrier for SPH conduction from at least 0.5 eV for undoped Fe 2 O 3 to 0.14 eV for doped ones. A combination of X-ray photoemission, X-ray absorption spectroscopy, and DFT calculations reveals that the Fermi level gradually shifts toward the conduction band minimum with Sn doping. A localized Fe 2+ -like gap state is observed at the top of the valence band, accounting for the SPH conduction. Interestingly, different from the literature, only 0.2% Sn doping in Fe 2 O 3 significantly improves the PEC activity, while more Sn decreases it. The improved PEC activity is partially attributed to an increased band bending potential which facilitates the charge separation at the space charge region. The reduced activation energy barrier for SPH will facilitate the transport of photoexcited carriers for the enhanced PEC, which is of interest for further carrier dynamics study.

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Section: Resultsmentioning

confidence: 57%

Electronic Structure, Optical Properties, and Photoelectrochemical Activity of Sn-Doped Fe₂O₃ Thin Films

Tian

Lin

et al. 2020

J. Phys. Chem. C

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“…The spray pyrolysis method is simple, cost effective and has been widely applied for the deposition of oxide thin films [17,18]. In recent years, the spray pyrolysis synthesis technique has been used widely for the preparation of SOFC electrolyte thin films [19].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of Gd0.1Ce0.9O1.95 thin films by spray pyrolysis technique

Chourashiya

Pawar

Jadhav

2008

Applied Surface Science

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Generation of complex Metal Oxides by Aerosol Processes: Superconducting ceramic particles and films

Kodas

1989

Advanced Materials

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Complex metal oxides, including ferroelectric, ferrimagnetic and superconducting ceramics, have a variety of technologically useful properties that can be exploited for a number of applications. Fabrication of complex metal oxide ceramics with specific properties requires high-purity powders with controlled chemical compositions, size distributions, and morphologies. Powders with these characteristics can be produced by aerosol processes in which fine particles are generated in gaseous flow systems. The particles can also be deposited from the gas phase onto surfaces to form films. This paper will discuss the use of aerosol processes for the generation of complex metal oxide powders. A review of aerosol processes will be presented first, followed by a discussion of the methods used for the generation of superconducting ceramic powders. Examples include the production of YBa,

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Studies on deposition of Fe2O3 films by spray pyrolysis method

Cited by 9 publications

References 7 publications

Electronic Structure, Optical Properties, and Photoelectrochemical Activity of Sn-Doped Fe₂O₃ Thin Films

Electronic Structure, Optical Properties, and Photoelectrochemical Activity of Sn-Doped Fe₂O₃ Thin Films

Synthesis and characterization of Gd0.1Ce0.9O1.95 thin films by spray pyrolysis technique

Generation of complex Metal Oxides by Aerosol Processes: Superconducting ceramic particles and films

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Studies on deposition of Fe2O3 films by spray pyrolysis method

Cited by 9 publications

References 7 publications

Electronic Structure, Optical Properties, and Photoelectrochemical Activity of Sn-Doped Fe2O3 Thin Films

Electronic Structure, Optical Properties, and Photoelectrochemical Activity of Sn-Doped Fe2O3 Thin Films

Synthesis and characterization of Gd0.1Ce0.9O1.95 thin films by spray pyrolysis technique

Generation of complex Metal Oxides by Aerosol Processes: Superconducting ceramic particles and films

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Electronic Structure, Optical Properties, and Photoelectrochemical Activity of Sn-Doped Fe₂O₃ Thin Films

Electronic Structure, Optical Properties, and Photoelectrochemical Activity of Sn-Doped Fe₂O₃ Thin Films