Giant Piezoelectricity and Excellent Thermal Sensitivity in Er Doped PSN-PMN-PT via Texturing-Driven Crystal Field
Ruigang Qiu1,2, Feifei Guo1, Shantao Zhang3
1Xi'an Structure-Function Materials International Science and Technology Cooperation Base School of Materials and Chemical Engineering, Xi'an Technological University, Xi'an, 710021, China.
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To address the challenge of concurrent regulation of piezoelectric and upconversion (UC) luminescent properties in multifunctional ceramics, this study introduces a texturing-induced crystal field engineering strategy. The [001]c texturing can significantly facilitate polarization rotations, meanwhile reducing the local crystal field symmetry at the B-sites of the Er3+ doped perovskites. As a result, a breakthrough in the piezoelectric and UC luminescent performance has been achieved in Er3+ doped Pb(Sc1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 (PSN-PMN-PT) ceramics by constructing the [001]c-oriented grains with a high Lotgering factor F001 ∼ 99.2%. The 0.0175Er:PSN-PMN-PT textured ceramic presents ultrahigh piezoelectric constant d33 ∼ 1120 pC N-1 and great luminescence thermal sensitivity (Sa = 0.0043 K-1, Sr = 0.028 K-1, δT = 0.48 K). Leveraging the dynamic correlation between crystal field-modulated thermally coupled energy levels (TCLs) and in situ piezoelectric-temperature responses, the textured ceramic demonstrates a dual-mode self-calibrated temperature sensing capability, showing its great potential for advanced optoelectronic-integrated applications. This study provides a new strategy to modulate the crystal field for the design of high-performance piezoelectric and UC luminescent multifunctional ceramics.
