Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7887219 | Ceramics International | 2018 | 42 Pages |
Abstract
This paper presents the luminescence properties and potential of red SrAl12O19:Mn4+ (SAO:Mn4+) phosphor for optical thermometry application. The SAO crystal consisted of a spinel block along with two mirror-like blocks. The Al3+/Sr2+ molar ratio of the precursor solution affected the crystalline-phases, morphology, and photoluminescence of the phosphor. The addition of flux H3BO3 promoted the growth of hexagonal-nanoflakes and enhanced the external quantum efficiency of phosphor 2.6-fold. The absolute sensitivity Sa and relative sensitivity Sr of SAO:Mn4+ showed a linear function of the temperature. The value of Sa was 4.17â¯Ãâ¯10â3 Kâ1, and the maximum Sr was 2.70â¯Ãâ¯10â3 Kâ1 at 393â¯K. A stable emission color was observed even with a change in temperature and a bright red light was seen in both daylight and a darkroom.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Su-Hua Yang, Yi-Ching Lee, Ying-Che Hung,