Synthesis of Stoichiometric FeS2 through Plasma-Assisted Sulfurization of Fe2O3 Nanorods

被引：105

作者：

Morrish, Rachel ^{[1
]}

Silverstein, Rebecca ^{[1
]}

Wolden, Colin A. ^{[1
]}

机构：

[1] Colorado Sch Mines, Dept Chem & Biol Engn, Golden, CO 80401 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2012年 / 134卷 / 43期

基金：

美国国家科学基金会;

关键词：

CHEMICAL-VAPOR-DEPOSITION; IRON PYRITE; PHOTOVOLTAIC ABSORBERS; HYDROGEN-SULFIDE; FILMS; OXIDATION; OXIDES; PHASE; NANOCRYSTALS; SULFURATION;

D O I：

10.1021/ja307412e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Pyrite (FeS2) thin films were synthesized using a H2S plasma to sulfurize hematite (Fe2O3) nanorods deposited by chemical bath deposition. The high S activity within the plasma enabled a direct solid-state transformation between the two materials, bypassing S-deficient contaminant phases (Fe1-xS). The application of plasma dramatically enhanced both the rate of conversion and the quality of the resulting material; stoichiometric FeS2 was obtained at a moderate temperature of 400 degrees C using a chalcogen partial pressure <6 X 10(-5) atm. As the S:Fe atomic ratio increased from 0 to 2.0, the apparent optical band gap dropped from 2.2 (hematite) to similar to 1 eV (pyrite), with completely converted layers exhibiting absorption coefficients >10(5) cm(-1) in the visible range. Room-temperature conductivity of FeS2 films was on the order of 10(-4) S cm(-1) and approximately doubled under calibrated solar illumination.

引用

页码：17854 / 17857

页数：4

共 33 条

[11] IRON DISULFIDE FOR SOLAR-ENERGY CONVERSION [J].

ENNAOUI, A ;

FIECHTER, S ;

PETTENKOFER, C ;

ALONSOVANTE, N ;

BUKER, K ;

BRONOLD, M ;

HOPFNER, C ;

TRIBUTSCH, H .

SOLAR ENERGY MATERIALS AND SOLAR CELLS, 1993, 29 (04) :289-370

[12] In situ XPS analysis of various iron oxide films grown by NO2-assisted molecular-beam epitaxy [J].

Fujii, T ;

de Groot, FMF ;

Sawatzky, GA ;

Voogt, FC ;

Hibma, T ;

Okada, K .

PHYSICAL REVIEW B, 1999, 59 (04) :3195-3202

[13] Pyrite FeS2 films obtained by sulphuration of iron pre-deposited films [J].

Hamdadou, N ;

Khelil, A ;

Bernède, JC .

MATERIALS CHEMISTRY AND PHYSICS, 2003, 78 (03) :591-601

[14] Increasing the Band Gap of Iron Pyrite by Alloying with Oxygen [J].

Hu, Jun ;

Zhang, Yanning ;

Law, Matt ;

Wu, Ruqian .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2012, 134 (32) :13216-13219

[15] HYDROGEN-PRODUCTION FROM THE DECOMPOSITION OF HYDROGEN-SULFIDE - EQUILIBRIUM STUDIES ON THE SYSTEM H2S/H2/SI, (I=1, ...8) IN THE GAS-PHASE [J].

KALOIDAS, VE ;

PAPAYANNAKOS, NG .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 1987, 12 (06) :403-409

[16] Bandgap engineered reverse type-I CdTe/InP/ZnS core-shell nanocrystals for the near-infrared [J].

Kim, Sunghoon ;

Shim, Wooyoung ;

Seo, Heonjin ;

Bae, Je Hyun ;

Sung, Jaeyoung ;

Choi, Seung Hong ;

Moon, Woo Kyung ;

Lee, Gwang ;

Lee, Bunyeoul ;

Kim, Sang-Wook .

CHEMICAL COMMUNICATIONS, 2009, (10) :1267-1269

[17] Synthesis and Optoelectronic Properties of Two-Dimensional FeS2 Nanoplates [J].

Kirkeminde, Alec ;

Ruzicka, Brian A. ;

Wang, Rui ;

Puna, Sarah ;

Zhao, Hui ;

Ren, Shenqiang .

ACS APPLIED MATERIALS & INTERFACES, 2012, 4 (03) :1174-1177

[18] Formation of chalcogen containing plasmas and their use in the synthesis of photovoltaic absorbers [J].

Kosaraju, S ;

Repins, I ;

Wolden, CA .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A, 2005, 23 (04) :1202-1207

[19] STRUCTURAL, OPTICAL AND ELECTRICAL-PROPERTIES OF POLYCRYSTALLINE IRON PYRITE LAYERS DEPOSITED BY REACTIVE DC MAGNETRON SPUTTERING [J].

LICHTENBERGER, D ;

ELLMER, K ;

SCHIECK, R ;

FIECHTER, S ;

TRIBUTSCH, H .

THIN SOLID FILMS, 1994, 246 (1-2) :6-12

[20] The preferential growth of pyrite films prepared by thermal sulfuration of Fe2O3 films [J].

Luan, Z. J. ;

Huang, L. Y. ;

Wang, F. ;

Meng, L. .

APPLIED SURFACE SCIENCE, 2011, 258 (04) :1505-1509

← 1 2 3 4 →