| The influence of CaTiO3content on the piezoelectric and photoluminescence performance ofthe0.3mol%Pr-doped NBT-xCT (x=0,0.02,0.04,0.06,0.08) ceramics was investigated. Theresults show that the NBT-xCT: Pr ceramic with x=0.04achieves the optimizedphotoluminescence and piezoelectric properties. A bright red emission at610nm and enhancedpiezoelectric response are achieved in the ceramics at room temperature. Furthermore, the resultsshow that the photoluminescence performance of the ceramics can be enhanced greatly by poling.The present study opens a way to enhance the photoluminescence of rare-earth doped ferroelectrics.Lead-free (1-x)Na0.5Bi0.5TiO3-xBa(Zr0.05Ti0.95)O3: Pr (NBT-xBZT: Pr, x=0-0.12) weresynthesized by conventional solid state method. The influence of Ba(Zr0.05Ti0.95)O3(BZT) contenton the piezoelectric and photoluminescence performance was investigated. The results show thatall ceramics exhibit strong red emission at607nm, and the NBT-0.07BZT: Pr ceramic shows theoptimal photoluminescence property. In addition, piezoelectric performance is also enhanced withthe increasing of BZT fraction, and reaches the maximum value at x=0.07. The results show thatthe Pr3+ions emission may be used as a probe for the phase transition of the ferroelectric materials.The piezoelectric, ferroelectric and optical properties of Er-doped Na0.5Bi0.5TiO3ceramicswere investigated in terms of Er3+ion occupying the A-and B-site with different Er ionconcentration. Compared with B-site doped samples, the A-site doped ceramics have muchstronger piezoelectricity, ferroelectric property, and luminescence intensity. Upon the excitation of980nm, all the Er-doped Na0.5Bi0.5TiO3ceramics exhibit strong green and red emissions. Thepresent investigation demonstrates that the relative intensity of green and red upconversionemissions can be tuned by changing Er ion concentration. In this study, influence of the electricaland luminescence properties of the Er doped ceramics is discussed. |
PDF Full Text Request