NIR to Visible Up‐conversion Luminescence of Er³⁺‐Doped PMN‐PT Transparent Ceramics

Abstract

The non‐doped and 0.5, 1.0, 2.0, and 5.0 mol% Er3+‐doped 0.75Pb(Mg1/3Nb2/3)O3‐0.25PbTiO3 (called PMN‐PT) transparent ceramics have been fabricated. The optical absorption spectra, photoluminescence excitation and emission spectra, and the up‐conversion luminescence spectra under the excitation of 980 nm laser were investigated. The up‐conversion luminescence of Er3+‐doped PMN‐PT transparent ceramics changes from yellowish green to reddish orange with increasing the Er3+ doping concentration. The dependence of visible up‐conversion luminescence on the laser power was measured. The up‐conversion luminescence saturation is observed for Er3+ 5.0 mol%‐doped PMN‐PT. A possible up‐conversion luminescence mechanism is proposed, which depends on Er3+ concentration. The up‐conversion emission is mainly due to excited state absorption for lightly Er3+‐doped PMN‐PT transparent ceramics, while the energy‐transfer processes are for highly doped ones.

Electric Field‐Induced Light Scattering in Eu‐Doped PMN‐PT Transparent Ceramics

“…Considering the optical reflection loss around 29% for infrared wavelength in PMN‐PT materials, our ceramics exhibit relatively high transparency about 87% when neglecting the reflection loss by proper antireflection coating . It should be noted that the Eu ions in our samples should be Eu 3+ considering the preparation process, and no absorption peaks of luminescent Eu 3+ were observed, which is different from Er‐doped 0.75PMN‐0.25PT transparent ceramics . The absorption spectroscopy of x % Eu‐doped 0.75PMN‐0.25PT( x = 2, 3, 4) transparent ceramics were shown in Fig.…”

“…7,11 It should be noted that the Eu ions in our samples should be Eu 3+ considering the preparation process, and no absorption peaks of luminescent Eu 3+ were observed, which is different from Er-doped 0.75PMN-0.25PT transparent ceramics. 16,18 The absorption spectroscopy of x% Eu-doped 0.75PMN-0.25PT(x = 2, 3, 4) transparent ceramics were shown in Fig. 1(b).…”

“…Meanwhile, it has been reported that luminescent Eu 3+ as a probe has been used to investigate the energy migration processes in PLZT ceramics which could reflect the variation of microstructures or phase structures in the ceramics . Furthermore, research about Eu‐doped transparent ceramics could be helpful in the search of new host materials with good chemical stability and high damage threshold for Eu 3+ since similar studies about Er‐doped 0.75PMN‐0.25PT ceramics has been conducted . Therefore, in this work, Eu‐doped 0.75PMN‐0.25PT transparent ceramics with different Eu concentrations were obtained by a two‐stage sintering method .…”

“…[13][14][15] Furthermore, research about Eu-doped transparent ceramics could be helpful in the search of new host materials with good chemical stability and high damage threshold for Eu 3+ since similar studies about Er-doped 0.75PMN-0.25PT ceramics has been conducted. [16][17][18] Therefore, in this work, Eu-doped 0.75PMN-0.25PT transparent ceramics with different Eu concentrations were obtained by a two-stage sintering method. 11 The microstructure and variation of transmittance under electric field of Eu-doped PMN-PT transparent ceramics were studied and discussed.…”

Cosolvent-Free Sol–Gel Synthesis and Optical Characterization of Silica Glasses Containing LaF3 and (La,Er)F3 Nanocrystals

“…46 The probability of ETU is larger at higher concentrations of Er 3+ ions, and a decrease in the slope from 2 to 1 at higher Er 3+ concentrations has been reported. 43,47 Another possible case for enhancing ETU is to increase the number of Er 3+ ions participating the process, realized by increasing in the size (volume) of the particles containing Er 3+ ions. This mechanism probably accounts for the observed smaller slope at z RE = 0.01 (Figure 10), because the average volume of LaF 3 crystals is ca.…”