Iron Oxide Films Prepared by Rapid Thermal Processing for Solar Energy Conversion

B. Wickman; Alice Bastos da Silva Fanta; Andrew Burrows; A. Hellman; Jakob Birkedal Wagner; Beniamino Iandolo

doi:10.1038/srep40500

Iron Oxide Films Prepared by Rapid Thermal Processing for Solar Energy Conversion

B. Wickman, Alice Bastos da Silva Fanta, Andrew Burrows, A. Hellman, Jakob Birkedal Wagner, Beniamino Iandolo

Chalmers University of Technology

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Abstract

Hematite is a promising and extensively investigated material for various photoelectrochemical (PEC) processes for energy conversion and storage, in particular for oxidation reactions. Thermal treatments during synthesis of hematite are found to affect the performance of hematite electrodes considerably. Herein, we present hematite thin films fabricated via one-step oxidation of Fe by rapid thermal processing (RTP). In particular, we investigate the effect of oxidation temperature on the PEC properties of hematite. Films prepared at 750 °C show the highest activity towards water oxidation. These films show the largest average grain size and the highest charge carrier density, as determined from electron microscopy and impedance spectroscopy analysis. We believe that the fast processing enabled by RTP makes this technique a preferred method for investigation of novel materials and architectures, potentially also on nanostructured electrodes, where retaining high surface area is crucial to maximize performance.

Original language	English
Article number	40500
Journal	Scientific Reports
Volume	7
Number of pages	9
ISSN	2045-2322
DOIs	https://doi.org/10.1038/srep40500
Publication status	Published - 2017

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COFUNDPostdocDTU: COFUNDPostdocDTU
Præstrud, M. R. (Project Participant) & Brodersen, S. W. (Project Participant)
01/01/2014 → 31/12/2019
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title = "Iron Oxide Films Prepared by Rapid Thermal Processing for Solar Energy Conversion",

abstract = "Hematite is a promising and extensively investigated material for various photoelectrochemical (PEC) processes for energy conversion and storage, in particular for oxidation reactions. Thermal treatments during synthesis of hematite are found to affect the performance of hematite electrodes considerably. Herein, we present hematite thin films fabricated via one-step oxidation of Fe by rapid thermal processing (RTP). In particular, we investigate the effect of oxidation temperature on the PEC properties of hematite. Films prepared at 750 °C show the highest activity towards water oxidation. These films show the largest average grain size and the highest charge carrier density, as determined from electron microscopy and impedance spectroscopy analysis. We believe that the fast processing enabled by RTP makes this technique a preferred method for investigation of novel materials and architectures, potentially also on nanostructured electrodes, where retaining high surface area is crucial to maximize performance.",

author = "B. Wickman and {da Silva Fanta}, {Alice Bastos} and Andrew Burrows and A. Hellman and Wagner, {Jakob Birkedal} and Beniamino Iandolo",

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doi = "10.1038/srep40500",

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journal = "Scientific Reports",

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T1 - Iron Oxide Films Prepared by Rapid Thermal Processing for Solar Energy Conversion

AU - Wickman, B.

AU - da Silva Fanta, Alice Bastos

AU - Burrows, Andrew

AU - Hellman, A.

AU - Wagner, Jakob Birkedal

AU - Iandolo, Beniamino

N1 - This work is licensed under a Creative Commons Attribution 4.0 International License

PY - 2017

Y1 - 2017

N2 - Hematite is a promising and extensively investigated material for various photoelectrochemical (PEC) processes for energy conversion and storage, in particular for oxidation reactions. Thermal treatments during synthesis of hematite are found to affect the performance of hematite electrodes considerably. Herein, we present hematite thin films fabricated via one-step oxidation of Fe by rapid thermal processing (RTP). In particular, we investigate the effect of oxidation temperature on the PEC properties of hematite. Films prepared at 750 °C show the highest activity towards water oxidation. These films show the largest average grain size and the highest charge carrier density, as determined from electron microscopy and impedance spectroscopy analysis. We believe that the fast processing enabled by RTP makes this technique a preferred method for investigation of novel materials and architectures, potentially also on nanostructured electrodes, where retaining high surface area is crucial to maximize performance.

AB - Hematite is a promising and extensively investigated material for various photoelectrochemical (PEC) processes for energy conversion and storage, in particular for oxidation reactions. Thermal treatments during synthesis of hematite are found to affect the performance of hematite electrodes considerably. Herein, we present hematite thin films fabricated via one-step oxidation of Fe by rapid thermal processing (RTP). In particular, we investigate the effect of oxidation temperature on the PEC properties of hematite. Films prepared at 750 °C show the highest activity towards water oxidation. These films show the largest average grain size and the highest charge carrier density, as determined from electron microscopy and impedance spectroscopy analysis. We believe that the fast processing enabled by RTP makes this technique a preferred method for investigation of novel materials and architectures, potentially also on nanostructured electrodes, where retaining high surface area is crucial to maximize performance.

U2 - 10.1038/srep40500

DO - 10.1038/srep40500

M3 - Journal article

C2 - 28091573

SN - 2045-2322

VL - 7

JO - Scientific Reports

JF - Scientific Reports

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ER -

Iron Oxide Films Prepared by Rapid Thermal Processing for Solar Energy Conversion

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