Enhancement in the Performance of Ultrathin Hematite Photoanode for Water Splitting by an Oxide Underlayer

被引：277

作者：

Hisatomi, Takashi ^{[1
]}

Dotan, Hen ^{[1
,2
]}

Stefik, Morgan ^{[1
]}

Sivula, Kevin ^{[1
]}

Rothschild, Avner ^{[2
]}

Graetzel, Michael ^{[1
]}

Mathews, Nripan ^{[1
,3
,4
]}

机构：

[1] Ecole Polytech Fed Lausanne, Inst Sci & Ingn Chim, CH-1015 Lausanne, Switzerland

[2] Technion Israel Inst Technol, Fac Mat Engn, IL-32000 Haifa, Israel

[3] Nanyang Technol Univ, Energy Res Inst NTU ERI N, Singapore 637553, Singapore

[4] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore

来源：

ADVANCED MATERIALS | 2012年 / 24卷 / 20期

关键词：

underlayer; electron back injection; niobium oxide; hematite; photoelectrochemical water splitting; NANOSTRUCTURED ALPHA-FE2O3; FILM THICKNESS; SOLAR; PHOTOOXIDATION; CELLS; ELECTRODES; OXYGEN;

D O I：

10.1002/adma.201104868

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A 2-nm thick Nb 2O 5 underlayer deposited by atomic layer deposition increases the charge separation efficiency and the photovoltage of ultrathin hematite films by suppressing electron back injection. Absorbed photon-to-current efficiencies (APCE) as high as 40%, which are one of the highest ever reported with hematite photoanodes, are obtained at 400 nm at +1.43 V vs. RHE. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

引用

页码：2699 / 2702

页数：4

共 25 条

[1] DIFFUSION OF FE-55 IN FE2O3 SINGLE-CRYSTALS [J].

ATKINSON, A ;

TAYLOR, RI .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1985, 46 (04) :469-475

[2] ARTIFICIAL PHOTOSYNTHESIS - SOLAR SPLITTING OF WATER TO HYDROGEN AND OXYGEN [J].

BARD, AJ ;

FOX, MA .

ACCOUNTS OF CHEMICAL RESEARCH, 1995, 28 (03) :141-145

[3] 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

[4] 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

[5] Probing the photoelectrochemical properties of hematite (α-Fe2O3) electrodes using hydrogen peroxide as a hole scavenger [J].

Dotan, Hen ;

Sivula, Kevin ;

Graetzel, Michael ;

Rothschild, Avner ;

Warren, Scott C. .

ENERGY & ENVIRONMENTAL SCIENCE, 2011, 4 (03) :958-964

[6] ELECTROCHEMICAL PHOTOLYSIS OF WATER AT A SEMICONDUCTOR ELECTRODE [J].

FUJISHIMA, A ;

HONDA, K .

NATURE, 1972, 238 (5358) :37-+

[7] A Ga2O3 underlayer as an isomorphic template for ultrathin hematite films toward efficient photoelectrochemical water splitting [J].

Hisatomi, Takashi ;

Brillet, Jeremie ;

Cornuz, Maurin ;

Le Formal, Florian ;

Tetreault, Nicolas ;

Sivula, Kevin ;

Graetzel, Michael .

FARADAY DISCUSSIONS, 2012, 155 :223-232

[8] THIN-FILM PHOTOELECTROCHEMISTRY - IRON-OXIDE [J].

ITOH, K ;

BOCKRIS, JO .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1984, 131 (06) :1266-1271

[9] New benchmark for water photooxidation by nanostructured α-Fe2O3 films [J].

Kay, Andreas ;

Cesar, Ilkay ;

Graetzel, Michael .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (49) :15714-15721

[10] Current and Voltage Limiting Processes in Thin Film Hematite Electrodes [J].

Klahr, Benjamin M. ;

Hamann, Thomas W. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2011, 115 (16) :8393-8399

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