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High‐Throughput Screening of Thin‐Film Semiconductor Material Libraries II: Characterization of FeWO Libraries
Author(s) -
Meyer Robert,
Sliozberg Kirill,
Khare Chinmay,
Schuhmann Wolfgang,
Ludwig Alfred
Publication year - 2015
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201402918
Subject(s) - photocurrent , ternary operation , crystallinity , materials science , phase (matter) , characterization (materials science) , thin film , sputter deposition , sputtering , chemical engineering , analytical chemistry (journal) , nanotechnology , chemistry , optoelectronics , composite material , organic chemistry , chromatography , computer science , engineering , programming language
Metal oxides are promising materials for solar water splitting. To identify suitable materials within the ternary system FeWO, 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 (Fe 6 W 94 )O x and (Fe 61 W 39 )O x . In addition to the well‐known phase WO 3 , the binary phase W 5 O 14 and the ternary phase Fe 2 O 6 W show enhanced photoelectrochemical activity. The highest photocurrent density of 65 μA cm −2 was achieved for the composition (Fe 15 W 85 )O x , which contains the W 5 O 14 phase and has a thickness of 1060 nm.