Investigation of up-conversion luminescence of Er and Er/Yb ions doped in PLZT for active electro-optical applications

Abstract

The up-conversion luminescence of Er³⁺ and Er³⁺/Yb³⁺ ions doped in lanthanum-modified lead zirconate titanate (PLZT) under 980 nm excitation at room temperature has been investigated. The green up-conversion luminescence at 540 and 566 nm was observed in Er³⁺:PLZT; the greater the concentration of Er³⁺ ions, the stronger the intensity. In Er³⁺–Yb³⁺:PLZT, other than the green up-conversion luminescence at 540 and 566 nm, a relatively weak red up-conversion luminescence at 668 nm was also observed. Both green and red up-conversion luminescence intensities presented an approximately quadratic dependence on excitation power, which indicated that two excitation photons are involved in the up-conversion process of Er³⁺:PLZT and Er³⁺–Yb³⁺:PLZT. The characteristics of PLZT ceramic material were also studied by Raman spectroscopy. This work shows a promising future for developing multifunctional up-conversion electro-optical devices using Er³⁺ and Er³⁺/Yb³⁺ ions doped PLZT.

Keywords

up-conversion luminescence / Er³⁺ and Er³⁺/Yb³⁺ doped / lanthanum-modified lead zirconate titanate (PLZT)