Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7898164 | Journal of the European Ceramic Society | 2018 | 8 Pages |
Abstract
A large and reversible up-conversion (UC) photoluminescence modulation via both thermal and electric-field stimulus based on the photochromic reactions has been developed in a novel material: Er3+/Yb3+ co-doped K0.5Na0.5NbO3 ferroelectrics. After visible light irradiation, the ceramics exhibit a significant photochromism phenomenon turning from pale yellow to gray. The gray color can be eliminated via heat treatment or partly removed by an electric field stimulation. Upon 390-nm light irradiation for 4â¯min and thermal treatment at 200â¯Â°C for 5â¯min, the ceramics show a large modulation ratio (96%). In addition, the UC photoluminescence modulation can be in-situ operated by alternating the light irradiation and electric-field, showing an enhancing factor of 120% for the 390-nm light irradiated ceramics via applying an electric-field stimulation (12.5â¯kV/cm, 1â¯min). The developed ferroelectrics with large and reversible photoluminescence modulation through thermal stimulus and electric-field have great potential for digital memory and optoelectronic device applications.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Yuanyuan Zhang, Laihui Luo, Kaixuan Li, Weiping Li, Yafei Hou,