Publication | Closed Access
Tunable Luminescence Contrast in Photochromic Ceramics (1 – <i>x</i>)Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub>–<i>x</i>Na<sub>0.5</sub>K<sub>0.5</sub>NbO<sub>3</sub>:0.002Er by an Electric Field Poling
115
Citations
43
References
2018
Year
A binary solid solution of Er<sup>3+</sup>-doped (1 - x)Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub>- xK<sub>0.5</sub>Na<sub>0.5</sub>NbO<sub>3</sub> ( x = 0.02, 0.04, 0.06, 0.08, 0.10, 0.12) ferroelectric ceramics has been developed, and a reversible photochromic (PC) reaction and its associated luminescence modulation are realized via alternating the 405 nm light irradiation and thermal stimulation (200 °C). The basic crystal structure, domain structure, ferroelectricity, and dielectric behavior of the ceramics were measured. A moderate luminescence contrast Δ R <sub>t</sub> over 50% is obtained in the fresh samples. Meanwhile, a greatly enhanced luminescence contrast Δ R <sub>t</sub> is obtained via an electric poling for compositions x = 0.02, 0.04, 0.06. For example, Δ R <sub>t</sub> is promoted from 53.4 to 85.3% for x = 0.02. However, the luminescence contrast Δ R <sub>t</sub> of compositions x = 0.08, 0.10, 0.12 is depressed after poling. The mechanisms of enhanced PC reaction and luminescence contrast Δ R <sub>t</sub> are discussed and proposed. The present study may open a window for enhancing the PC reaction.
| Year | Citations | |
|---|---|---|
Page 1
Page 1