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Ln$^{3+}$ (Eu$^{3+}$ and Dy$^{3+}$) luminescence in Ca$_2$SrAl$_2$O$_6$ phosphor for solid-state lighting
A N YERPUDE S K RAMTEKE V B PAWADE N S KOKODE S J DHOBLE
Volume 45 Published: 13 October 2022 Article ID 0199
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https://www.ias.ac.in/article/fulltext/boms/045/0199 -
Keywords
Photoluminescence ;lanthanides ;synthesis ;SSL -
Abstract
This article reports photoluminescence in Eu$^{3+}$ and Dy$^{3+}$ doped Ca$_2$SrAl$_2$O$_6$ aluminate phosphor. Here combustion technique is used to synthesize a series of phosphors. The excitation spectra of Ca$_2$SrAl$_2$O$_6$:Eu$^{3+}$phosphor appears at 396 nm, under which we get a prominent emission bands at 590–596 nm and another peak located at 616 nm that corresponds to the orange-red region. These spectral bands are assigned due to ${}^5$D$_0$${\rightarrow}$${}^7$F$_1$, 7F2 electronic transitions of activator Eu$^{3+}$ ion, respectively. Whereas, Ca$_2$SrAl$_2$O$_6$:Dy$^{3+}$ phosphor shows two bands that correspond to 476 and 573 nm when excited by 352 nm. These two emission peaks correspond to the well-known ${}^4$F$_{9/2}$${\rightarrow}$${}^6$H$_{15/2}$, ${}^6$H$_{13/2}$ transitions of rare-earth Dy$^{3+}$ ion, respectively. Thus, from the observed photoluminescence properties, it is seen that prepared aluminate phosphor may be a suitable material for solid-state lighting.
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Author Affiliations
A N YERPUDE1 S K RAMTEKE1 V B PAWADE2 N S KOKODE3 S J DHOBLE4
- Department of Physics, N.H. College, Brahmapuri 441206, India
- Department of Applied-Physics, LIT, RTM Nagpur University, Nagpur 440033, India
- N.H. College, Brahmapuri 441206, India
- Department of Physics, RTM Nagpur University, Nagpur 440033, India
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Dates
- Published
- 13 October 2022
- Manuscript received
- 20 April 2022
- Accepted
- 17 June 2022
- Final version published online
- 13 October 2022
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Volume 46, 2023
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