Interfacial insight in multi-junction metal oxide photoanodes for water splitting applications

被引：43

作者：

Mettenboerger, A. ^{[1
]}

Goenuellue, Y. ^{[1
]}

Fischer, T. ^{[1
]}

Heisig, T. ^{[1
]}

Sasinska, A. ^{[1
]}

Maccato, C. ^{[2
,3
]}

Carraro, G. ^{[2
,3
]}

Sada, C. ^{[4
]}

Barreca, D. ^{[5
,6
]}

Mayrhofer, L. ^{[7
]}

Moseler, M. ^{[7
]}

Held, A. ^{[7
]}

Mathur, S. ^{[1
,8
]}

机构：

[1] Univ Cologne, Inst Inorgan Chem, Greinstr 6, D-50859 Cologne, Germany

[2] Univ Padua, Dept Chem, Via Marzolo 1, I-35131 Padua, Italy

[3] INSTM, Via Marzolo 1, I-35131 Padua, Italy

[4] Univ Padua, Dept Phys & Astron, Via Marzolo 8, I-35131 Padua, Italy

[5] Univ Padua, CNR IENI, Via Marzolo 1, I-35131 Padua, Italy

[6] Univ Padua, INSTM, Dept Chem, Via Marzolo 1, I-35131 Padua, Italy

[7] Fraunhofer Inst Mech Mat IWM, Freiburg, Germany

[8] Xi An Jiao Tong Univ, Sch Energy & Power Engn IRCRE, Int Res Ctr Renewable Energy, Xian 710049, Shaanxi, Peoples R China

来源：

NANO ENERGY | 2016年 / 19卷

关键词：

Multi-junction; Water-splitting; Fe2O3; TiO2; Ab-initio; DOPED HEMATITE NANOSTRUCTURES; THIN-FILMS; PHOTOELECTROCHEMICAL PERFORMANCE; CELLS; ABSORPTION; GENERATION; ULTRAFAST; DYNAMICS; GROWTH; TI;

D O I：

10.1016/j.nanoen.2015.09.018

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Photoelectrochemical (PEC) properties of nanostructured hematite (Fe2O3) thin films prepared using plasma -enhanced chemical vapor deposition (PE-CVD) were investigated against the influence of processing parameters and post -synthesis heat -treatment procedures. Annealing at high temperatures (>500 degrees C) was found to substantially affect the micro -structure (grain growth and densification) and electronic (interdiffusion at the film/substrate interface) concomitantly manifested in an enhancement in the PEC behavior. The Sn impurity level in hematite films was found to increase with the annealing temperature with highest values achieved in samples heat -treated at 750 degrees C, due to the interdiffusion and substitution of Sn(IV) species at Fe(III) sites. Sn:Fe2O3 films exhibited significantly high photocurrent density of 1.33 mA cm(-2) at the water oxidation level of 1.23 V vs. RHE. The diffusion of Sn ions into iron oxide lattice altered the electronic properties of hematite films due to electron -donor behavior of the dopants that was verified by X-ray photoelectron spectroscopy and secondary ion mass spectroscopy (SIMS) analyses. Deposition of a thin overlayer of TiO2 (10 nm) on hematite films by atomic layer deposition (ALD) was found to further improve the photocurrent density to 1.8 mA cm(-2) at 1.23 V vs. RHE. Ab-initio calculations on the effect of substitutional Sn(IV) dopants in the Fe2O3 lattice on the electronic structure and the band alignment between

引用

页码：415 / 427

页数：13

共 62 条

[1]

[Anonymous], 2013, Semiconductor Surfaces and Interfaces

[2] Columnar Fe2O3 arrays via plasma-enhanced growth: Interplay of fluorine substitution and photoelectrochemical properties [J].

Barreca, Davide ;

Carraro, Giorgio ;

Gasparotto, Alberto ;

Maccato, Chiara ;

Sada, Cinzia ;

Singh, Aadesh P. ;

Mathur, Sanjay ;

Mettenboerger, Andreas ;

Bontempi, Elza ;

Depero, Laura E. .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2013, 38 (33) :14189-14199

[3] PROJECTOR AUGMENTED-WAVE METHOD [J].

BLOCHL, PE .

PHYSICAL REVIEW B, 1994, 50 (24) :17953-17979

[4] Effect of Tin Doping on α-Fe2O3 Photoanodes for Water Splitting [J].

Bohn, Christopher D. ;

Agrawal, Amit K. ;

Walter, Erich C. ;

Vaudin, Mark D. ;

Herzing, Andrew A. ;

Haney, Paul M. ;

Talin, A. Alec ;

Szalai, Veronika A. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2012, 116 (29) :15290-15296

[5] Examining architectures of photoanode-photovoltaic tandem cells for solar water splitting [J].

Brillet, Jeremie ;

Cornuz, Maurin ;

Le Formal, Florian ;

Yum, Jun-Ho ;

Graetzel, Michael ;

Sivula, Kevin .

JOURNAL OF MATERIALS RESEARCH, 2010, 25 (01) :17-24

[6] Fluorine doped Fe2O3 nanostructures by a one-pot plasma-assisted strategy [J].

Carraro, G. ;

Gasparotto, A. ;

Maccato, C. ;

Bontempi, E. ;

Lebedev, O. I. ;

Turner, S. ;

Sada, C. ;

Depero, L. E. ;

Van Tendeloo, G. ;

Barreca, D. .

RSC ADVANCES, 2013, 3 (45) :23762-23768

[7] Fluorine-Doped Iron Oxide Nanomaterials by Plasma Enhanced-CVD: An XPS Study [J].

Carraro, Giorgio ;

Gasparotto, Alberto ;

Maccato, Chiara ;

Barreca, Davide .

SURFACE SCIENCE SPECTRA, 2013, 20 (01) :9-16

[8] Translucent thin film Fe2O3 photoanodes for efficient water splitting by sunlight:: Nanostructure-directing effect of Si-doping [J].

Cesar, I ;

Kay, A ;

Martinez, JAG ;

Grätzel, M .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (14) :4582-4583

[9] Influence of Feature Size, Film Thickness, and Silicon Doping on the Performance of Nanostructured Hematite Photoanodes for Solar Water Splitting [J].

Cesar, Ilkay ;

Sivula, Kevin ;

Kay, Andreas ;

Zboril, Radek ;

Graetzel, Michael .

JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (02) :772-782

[10] Increasing Solar Absorption for Photocatalysis with Black Hydrogenated Titanium Dioxide Nanocrystals [J].

Chen, Xiaobo ;

Liu, Lei ;

Yu, Peter Y. ;

Mao, Samuel S. .

SCIENCE, 2011, 331 (6018) :746-750

← 1 2 3 4 5 6 7 →