Back to Search
Start Over
Enhanced deep-red emission from Mn4+/Mg2+ co-doped CaGdAlO4 phosphors for plant cultivation.
- Source :
- Dalton Transactions: An International Journal of Inorganic Chemistry; 2/21/2019, Vol. 48 Issue 7, p2455-2466, 12p
- Publication Year :
- 2019
-
Abstract
- Mn<superscript>4+</superscript>-Doped oxide phosphors are under intensive investigation owing to their low manufacture cost and attractive luminescent features for indoor plant cultivation applications. However, it is still a challenge to develop Mn<superscript>4+</superscript>-doped oxides with high luminescence efficiency and thermal stability. Herein, Mn<superscript>4+</superscript>–Mg<superscript>2+</superscript> pairs are incorporated into a CaGdAlO<subscript>4</subscript> host to reduce non-radiative channels formed by Mn<superscript>4+</superscript>–Mn<superscript>4+</superscript>–O<superscript>2−</superscript> clusters. The photoluminescence and quantum efficiency are significantly enhanced after the introduction of Mg<superscript>2+</superscript> ions to the host. A prolonged Mn<superscript>4+</superscript> decay time is also obtained from the Mn<superscript>4+</superscript>/Mg<superscript>2+</superscript> co-doped samples. Intense red emission with a narrow peak at 712 nm due to the <superscript>2</superscript>E<subscript>g</subscript>→<superscript>4</superscript>A<subscript>2g</subscript> transition of Mn<superscript>4+</superscript> ions is observed under 335 nm excitation. LEDs fabricated by coating the synthesized phosphor on a 365 nm near-UV chip exhibit an intense deep-red emission with CIE chromaticity coordinates of (0.712, 0.285). The results indicate Mn<superscript>4+</superscript>/Mg<superscript>2+</superscript> co-doped CaGdAlO<subscript>4</subscript> phosphors may be applicable to plant cultivation fields. [ABSTRACT FROM AUTHOR]
- Subjects :
- MANGANESE compounds
DOPING agents (Chemistry)
PHOSPHORS
Subjects
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 48
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 134660056
- Full Text :
- https://doi.org/10.1039/c8dt04955f