Low-temperature synthesis of KTa0.55Nb0.45O3 powders and thin films via metal-organic solution
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Potassium tantalite niobate powders and thin films were synthesized via metal-organic solution. The synthesized powders and thin films have a tetragonal phase with the perovskite structure. The powders show a cubic shape with sizes in the range of 120–230 nm. The emission spectrum of powders shows emissions peaked at 413, 451 and 468 nm, related to the electron-hole recombination of localized exciton Ta4+–O1− and Nb4+–O1− in a regular octahedron (TaO6 and NbO6). The polarization-electric field hysteresis loop of thin films is rectangular. The current–voltage characteristic of thin films shows a feature of linear to nonlinear transition, which is related to the space-charge-controlled mode of electrical conduction in solids.
KeywordsEthoxide Nonlinear Transition Pure Alcohol Localize Exciton Pulse Laser Deposition Method
This work is supported financially by the National Science Foundation of China (Grant Nos. 51102158 and 51202135), and Promotive Research Fund for Excellent Young and Middle-aged Scientists of Shandong Province (Grant No. BS2010CL042).