High-throughput screening of thin-film semiconductor material libraries II: characterization of Fe-W-O libraries.
Metal oxides are promising materials for solar water splitting. To identify suitable materials within the ternary system FeWO, thin-film material libraries with combined thickness and compositional gradients were synthesized by combinatorial reactive magnetron sputtering. These libraries (>1000 different samples) were investigated by means of structural and functional high-throughput characterization techniques to establish correlations between composition, crystallinity, morphology, thickness, and photocurrent density in the compositional range between (Fe6 W94 )Ox and (Fe61 W39 )Ox . In addition to the well-known phase WO3 , the binary phase W5 O14 and the ternary phase Fe2 O6 W show enhanced photoelectrochemical activity. The highest photocurrent density of 65 μA cm(-2) was achieved for the composition (Fe15 W85 )Ox , which contains the W5 O14 phase and has a thickness of 1060 nm.
Institute for Materials, Ruhr-University Bochum, Universitätsstraße 150, 44801 Bochum (Germany).
Robert
R
Meyer
Kirill
K
Sliozberg
Chinmay
C
Khare
Wolfgang
W
Schuhmann
Alfred
A
Ludwig
D004583:Electrons; D007501:Iron / Q000737:chemistry*; D060526:Magnetic Fields; D010100:Oxygen / Q000737:chemistry*; D019904:Polymethyl Methacrylate / Q000737:chemistry; D012666:Semiconductors; D014414:Tungsten / Q000737:chemistry*
D019904:Polymethyl Methacrylate; D007501:Iron; D010100:Oxygen; D014414:Tungsten
combinatorial chemistry; energy conversion; high-throughput screening; photoelectrochemistry; thin films