p-type conduction induced by N-doping in α-Fe2O3

A p-type N-doped α-Fe2O3 was developed by magnetron sputtering of a Fe2O3 target in a plasma containing N2 and Ar followed by postannealing. Photoelectrochemical measurement under visible light irradiation (>410 nm) showed that N–Fe2O3 exhibits a typical cathodic photocurrent originated from the p-type conduction. X-ray photoemission spectroscopy indicated that the atomic N incorporated substitutionally at O sites was responsible for the p-type conduction. The concentration of acceptors was very close to that for Zn-doped Fe2O3, a typical p-type α-Fe2O3. This finding would stimulate further research on p-type Fe2O3 for solar fuel generation, etc.

[1]  Keiko Uemura,et al.  Photoelectrochemical reduction of CO(2) in water under visible-light irradiation by a p-type InP photocathode modified with an electropolymerized ruthenium complex. , 2010, Chemical communications.

[2]  Tao Yu,et al.  Improved photoelectrochemical responses of Si and Ti codoped α-Fe2O3 photoanode films , 2010 .

[3]  T. Kajino,et al.  Visible-light-induced selective CO2 reduction utilizing a ruthenium complex electrocatalyst linked to a p-type nitrogen-doped Ta2O5 semiconductor. , 2010, Angewandte Chemie.

[4]  T. Kajino,et al.  Dual functional modification by N doping of Ta2O5: p-type conduction in visible-light-activated N-doped Ta2O5 , 2010 .

[5]  S. Ida,et al.  N doping of oxide nanosheets. , 2009, Journal of the American Chemical Society.

[6]  Fu-Ren F. Fan,et al.  Rapid Screening of Effective Dopants for Fe2O3 Photocatalysts with Scanning Electrochemical Microscopy and Investigation of Their Photoelectrochemical Properties , 2009 .

[7]  T. Morikawa,et al.  Optical bandgap widening of p-type Cu2O films by nitrogen doping , 2009 .

[8]  H. Jung,et al.  Defect energy levels in Ta2O5 and nitrogen-doped Ta2O5 , 2008 .

[9]  K. Rosso,et al.  Linked Reactivity at Mineral-Water Interfaces Through Bulk Crystal Conduction , 2008, Science.

[10]  Michael Grätzel,et al.  New Benchmark for Water Photooxidation by Nanostructured α-Fe2O3 Films , 2006 .

[11]  M. Gray,et al.  Enhanced carbon doping of n-TiO2 thin films for photoelectrochemical water splitting , 2006 .

[12]  Takeshi Morikawa,et al.  Deep-level characterization of N-doped ZnO films prepared by reactive magnetron sputtering , 2005 .

[13]  R. Černý,et al.  Photoelectrochemical oxidation of water at transparent ferric oxide film electrodes. , 2005, The journal of physical chemistry. B.

[14]  H. Ohno,et al.  Repeated temperature modulation epitaxy for p-type doping and light-emitting diode based on ZnO , 2004 .

[15]  K. Hashimoto,et al.  Visible Light Sensitive Photocatalysts, Nitrogen-Doped Ta2O5 Powders , 2004 .

[16]  J. Baltrus,et al.  Photoresponse of p-type zinc-doped iron(III) oxide thin films. , 2004, Journal of the American Chemical Society.

[17]  Oliver Diwald,et al.  Photochemical Activity of Nitrogen-Doped Rutile TiO2(110) in Visible Light , 2004 .

[18]  R. Asahi,et al.  Visible-Light Photocatalysis in Nitrogen-Doped Titanium Oxides , 2001, Science.

[19]  R. Asahi,et al.  Band-Gap Narrowing of Titanium Dioxide by Nitrogen Doping , 2001 .

[20]  L. Peter,et al.  Dynamic aspects of semiconductor photoelectrochemistry , 1990 .

[21]  R. M. Benito,et al.  Kinetic Approach to the Photocurrent Transients in Water Photoelectrolysis at n ‐ TiO2 Electrodes II . Analysis of the Photocurrent‐Time Dependence , 1990 .

[22]  Gabor A. Somorjai,et al.  The characterization of doped iron oxide electrodes for the photodissociation of water: stability, optical, and electronic properties , 1984 .

[23]  G. Somorjai,et al.  Photocatalytic production of hydrogen from water by a p- and n-type polycrystalline iron oxide assembly , 1982 .

[24]  J. Kennedy,et al.  Photooxidation of Water at α ‐ Fe2 O 3 Electrodes , 1978 .