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Diffuse light‐scattering properties of nanocracked and porous MoO 3 films self‐formed by electrodeposition and thermal annealing
Author(s) -
Ko Yeong Hwan,
Raju Ganji Seeta Rama,
Kim Sunkook,
Yu Jae Su
Publication year - 2012
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201228137
Subject(s) - materials science , amorphous solid , indium tin oxide , annealing (glass) , surface roughness , scattering , light scattering , molybdenum trioxide , oxide , porosity , molybdenum , thin film , optics , chemical engineering , composite material , nanotechnology , metallurgy , crystallography , chemistry , physics , engineering
We report the diffuse light‐scattering properties of nanocracked and porous molybdenum trioxide (MoO 3 ) films deposited on indium tin oxide (ITO) coated glass as a transparent conductive oxide (TCO), caused by the enhanced light diffraction due to high surface roughness as well as narrow slit‐like structures. By utilizing the electrodeposition and thermal annealing processes, the hydrous and amorphous molybdenum oxide films were changed into crystallized MoO 3 films with self‐formed nanocracks and rough surface. From the theoretical analysis of the light behavior passing through the morphology of MoO 3 films, a considerable diffuse light scattering was predicted. In order to optimize the light‐scattering property, the structural and optical characteristics of MoO 3 films on ITO/glass at different applied voltages were investigated. For a proper applied voltage of 2 V, widely distributed nanocracks and rough surface were observed, leading to the enhanced diffuse transmittance of 54% at λ ∼ 410 nm. Additionally, the fabricated MoO 3 films on ITO/glass exhibited a more hydrophilic surface.