Abstract
Developing highly tunable multifunctional performances in one ferroelectric system is in line with the integration trend of electronic equipment. Herein, rare earth erbium (Er) modulated 0.95K0.5Na0.5NbO3–0.05Bi(Li0.5Nb0.5)O3–x%Er photoluminescent–ferroelectric energy storage multifunctional ceramics are prepared. All the compositions exhibit a similar grain size and compact microstructure. In addition, the optimized Er dopant enhances the enhanced relaxor characteristic and reduces oxygen vacancies. The introduction of Er3+ into perovskite lattice contributes to the observed photoluminescence behavior. Therefore, high effective energy storage density (Wrec) of 7.17 J/cm3, energy storage efficiency (η) of 65.4%, and strong green/red upconversion photoluminescence are obtained in x = 0.2 sample. This work opens up a paradigm to develop multifunctional ferroelectric ceramics for application in electro-optical devices.
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