Improved piezoelectric and photoluminescence properties in Ce-doped PSN-PMN-PT piezoelectric ceramics by multiscale coordination.

The large piezoelectric coefficient (d 33) and high mechanical quality factor (Q m) are essential for piezoelectric ceramics used in high-power devices. It is pity that the two parameters are usually opposite, with higher d 33 corresponding to lower Q m. In order to well-balance the d 33 and Q m , the rare-earth element Ce with multi-valence was introduced into the 0.06 Pb(Sc 1/2 Nb 1/2)O 3 -0.61 Pb(Mg 1/3 Nb 2/3)O 3 -0.33PbTiO 3 (x Ce-PSN-PMN-PT) ceramics in this work. The structure, electrical properties and optical properties of ceramics were systematically analyzed. Optimal electrical performances (d 33 = 719 pC/N, Q m = 256, and dielectric loss tan δ = 0.007) were obtained in 0.02Ce-PSN-PMN-PT ceramics. These excellent performances originate from the multiscale coordination effects among defect dipoles, local structural heterogeneity, domain structure, phase structure, and grain size. The x Ce-PSN-PMN-PT ceramics exhibit excellent photoluminescence properties in the blue wavelength range. Our research provides a new paradigm for deep-sea electro-optical communication. [ABSTRACT FROM AUTHOR]