@article{SisLab4131,
          volume = {4},
          number = {3},
           month = {September},
          author = {Dang Co Nguyen and Dinh Tu Bui and Viet Cuong Le and Duc Thang Pham},
           title = {Effect of crystallization temperature on energy-storage density and efficiency of lead-free Bi0.5(Na0.8K0.2)0.5TiO3 thin films prepared by sol?gel method},
       publisher = {Elsevier B.V},
            year = {2019},
         journal = {Journal of Science: Advanced Materials and Devices},
           pages = {370--375},
             url = {https://eprints.uet.vnu.edu.vn/eprints/id/eprint/4131/},
        abstract = {Lead-free Bi0.5(Na0.80K0.20)0.5TiO3 (BNKT) ferroelectric films were synthesized on Pt/Ti/SiO2/Si substrates via the chemical solution deposition. The influence of the crystallization temperature on the microstructures, the ferroelectric and energy-storage properties of the films was investigated in detail. The results showed that the BNKT films have reached the well crystallized state in the single-phase perovskite structure at 700 ?C. Ferroelectric and energy-storage properties of the films were significantly enhanced by increasing the crystallization temperature. The remnant polarization (2Pr) and maximum polarization (2Pm) reached the highest values of 18.4 {\ensuremath{\mu}}C/cm2 and 61.2 {\ensuremath{\mu}}C/cm2, respectively, under an applied electric field of 300 kV/cm. Thanks to the strong enhancement in 2Pm and the large Pmax - Pr value, the highest energy-storage density (Jreco) and efficiency of 2.3 J/cm3 and 58.2\%, respectively, were obtained. These results indicate that the BNKT films have application potentials in advanced capacitors.}
}