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The preparation and surface photovoltage characterization of KNbO3 powder
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The preparation and surface photovoltage characterization of KNbO3 powder
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Journal Article
The preparation and surface photovoltage characterization of KNbO3 powder
2015
Overview
Potassium niobate KNbO
3
powder was synthesized via a solid-state reaction method. X-ray diffraction analysis confirmed that the compound is orthorhombic structure with space group C
m2
m
. The cuboid-shape morphology with average grain size about 100–300 nm was observed by scanning electron microscope. A strong absorption from the onset at 350 nm was observed, and the energy bandgap is estimated to be 3.23 eV. KNbO
3
also exhibits an obvious photovoltaic response from 320 to 380 nm with a peak at 352 nm, which is due to the electronic transfer from O 2p to Nb 4d. It was suggested that the build-in electric field mainly contribute to the photovoltaic response for orthorhombic KNbO
3
.
Publisher
Springer US,Springer Nature B.V
