Enhancement of up-conversion emission and field-induced strain in BNT-based multifunctional ceramics doping with LiNbO3

Multifunctional ferroelectric materials (1− x ) (Bi 0.5 Na 0.5 ) 0.935 Ba 0.065 Ti 0.995 (Er 0.5 Sb 0.5 ) 0.005 O 3 - x LiNbO 3 (BNBT-ES- x LN, x = 0, 0.015, 0.025, 0.030) were prepared through the method of conventional solid-state. The influence of LiNbO 3 content on the field-induced stain and photoluminescence behavior was studied. The results showed that LN-doped BNBT-ES materials obtained a large reversible field-induced-strain of 0.35% (under an electric field of 80 kV/cm) with a high normalized strain d * 33 ( S max / E max ) of 422 pm/V, at x = 0.025. BNBT-ES- x LN ceramics also exhibited a bright green up-conversion emission under excitation of 980 nm. Through the charge compensation mechanism and the increase of the transition probability between 4f electrons, the up-conversion luminescence performance of Er 3+ is enhanced with the LN doping. The BNBT-ES- x LN system is expected to be applied for multifunctional electronic devices such as optical-electro integration and coupling device due to its excellent electrical and photoluminescence performance.