Electromechanical properties and photoluminescence of Er3+-doped PMN-33PT single crystal

Based on the successful growth of large-sized Er3+-doped PMN-PT single crystal, the phase composition, electromechanical properties and photoluminescence of [001](C)-oriented Er3+-doped PMN-33PT crystal were investigated in detail. The results show that the crystal coexists in rhombohedral and monoclinic phases at room temperature. The crystal possesses excellent piezoelectric (d(33) similar to 2103 pC/N), dielectric (epsilon(T)(33) similar to 7589), and electromechanical coupling properties (k(33) similar to 0.91), accompanied by a higher phase transition temperature and larger coercive field compared with that of PMN-33PT single crystal. This indicates an improved electromechanical performance induced by Er3+ doping. Additionally, the crystal achieves upconversion and downconversion luminescence, and a strong dependence of the upconversion emission on temperature is demonstrated. Furthermore, a comparable optical temperature sensing performance based on the fluorescence intensity ratio of the upconversion luminescence is verified. These results demonstrate a promising multifunctional material. The electro-optical coupling performance of the Er3+-doped PMN-33PT crystal is under evaluation. (C) 2022 Elsevier B.V. All rights reserved.

Automated summary

This study investigates the phase composition, electromechanical properties, and photoluminescence of Er3+-doped PMN-33PT crystal. The crystal exhibits excellent piezoelectric and electromechanical coupling properties, and demonstrates both upconversion and downconversion luminescence. The crystal also shows promising optical temperature sensing performance.