Aqueous chemical growth of alpha-Fe2O3-alpha-Cr203 nanocompositethin films

Journal Article · Sat Jun 30 04:00:00 EDT 2001 · Journal of Nanoscience and Nanotechnology

DOI:https://doi.org/10.1166/jnn.2001.055· OSTI ID:892934

Vayssieres, Lionel; Guo, Jinghua; Nordgren, Joseph

We are reporting here on the inexpensive fabrication and optical properties of an iron(III) oxide chromium(III) oxide nanocomposite thin film of corundum crystal structure. Its novel and unique-designed architecture consists of uniformed, well-defined and oriented nanorods of Hematite (alpha-Fe2O3) of 50 nm in diameter and 500nm in length and homogeneously distributed nonaggregated monodisperse spherical nanoparticles of Eskolaite (alpha-Cr2O3) of 250 nm in diameter. This alpha-Fe2O3 alpha-Cr2O3 nanocomposite thin film is obtained by growing, directly onto transparent polycrystalline conducting substrate, an oriented layer of hematite nanorods and growing subsequently, the eskolaite layer. The synthesis is carried out by a template-free, low-temperature, multilayer thin film coating process using aqueous solution of metal salts as precursors. Almost 100 percent of the light is absorbed by the composite film between 300 and 525 nm and 40 percent at 800 nm which yields great expectations as photoanode materials for photovoltaic cells and photocatalytic devices.

• Research Organization: Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
• Sponsoring Organization: USDOE Director. Office of Science. Office of Basic EnergySciences; Uppsala University/Sweden
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 892934
• Report Number(s): LBNL--50919; BnR: KC0204016
• Journal Information: Journal of Nanoscience and Nanotechnology, Journal Name: Journal of Nanoscience and Nanotechnology Journal Issue: 4 Vol. 1
• Country of Publication: United States
• Language: English

Related Subjects

13 HYDRO ENERGY
14 SOLAR ENERGY
36 MATERIALS SCIENCE
AQUEOUS SOLUTIONS
ARCHITECTURE
COATINGS
CORUNDUM
CRYSTAL STRUCTURE
Eskolaite Hematite Iron oxide Chromium Oxide NanocompositeNanorod Thin Film
FABRICATION
HEMATITE
OPTICAL PROPERTIES
OXIDES
PHOTOANODES
PHOTOVOLTAIC CELLS
SYNTHESIS
THIN FILMS