Er3+ and Sr(Bi0.5Nb0.5)O3-modified (K0.5Na0.5)NbO3: A new transparent fluorescent ferroelectric ceramic with high light transmittance and good luminescence performance

Abstract

In this work, (K 0.5 Na 0.5 )NbO 3 –Sr(Bi 0.5 Nb 0.5 )O 3 : x wt% Er 3+ ( x = 0.1–0.4) transparent fluorescent ferroelectric ceramics were prepared using traditional solid-phase method. By solid solution of the second component Sr(Bi 0.5 Nb 0.5 )O 3 (SBN) and doped rare earth Er 3+ to modify (K 0.5 Na 0.5 )O 3 (KNN), it was successfully prepared with good luminescence performance while maintaining ceramic samples with excellent light transmittance. Results show that the representative 0.94(K 0.5 Na 0.5 )NbO 3 -0.06Sr(Bi 0.5 Nb 0.5 )O 3 : 0.1 wt%Er 3+ ceramic sample has a light transmittance of 80.25% in the near-infrared band (1100 nm). Meanwhile, in the visible light band (780 nm), the light transmittance is maintained at 71.95%. At the same time, the ceramic sample has good up-conversion luminescence performance, with two green light emissions and one red light emission at 525, 550 and 665 nm. The SEM photos show that the crystal grain size of the ceramic sample reaches the nanometer level with a fine and dense microstructure. The XRD pattern shows that the ceramic sample is in the pseudo cubic phase structure with the weakest optical anisotropy. In addition, the introduction of Bi 3+ makes the ceramic samples significantly suppress P r while maintaining a high P max , the ceramic samples have certain ferroelectric properties and good energy storage potential. This work has prepared an excellent multifunctional material, which provides helpful references for the development of opto-electronic materials.