Synthesis, characterization, and enhanced photoluminescence of ZrO2:Dy3+ phosphors by incorporating Li+, Na+ and K+ ions for LED applications.
In: Ceramics International, Jg. 50 (2024-04-20), Heft 8, S. 13219-13228
academicJournal
Zugriff:
ZrO 2 :(0.01)Dy3+:xA+ (A = Li+, Na+ and K+) phosphors were prepared by one step solution combustion method. X-ray diffraction (XRD), reveal formation of different phases. Functional group presence and its vibrations are assigned from FTIR measurements. Influence of alkali metal ions (A+) on surface morphology were realized from SEM micrograph. XPS study was carried out to confirm the presence of Li+ ions. Photoluminescence (PL) spectra of the samples excited at 350 nm exhibited two strong emission peaks at 480 nm and 580 nm, which are characteristic transitions of Dy3+ ions. However, the relative intensity between these peaks varies considerably due to the variation of the co-dopant/compensator (Li+, Na+, K+) concentration, representing the variation of the crystal field. Effects of different charge compensators (A+) and their concentration on the structural and luminescence properties of ZrO 2 :(0.01)Dy3+:xA+ phosphors were thoroughly investigated. Further, Judd-Ofelt parameters were calculated. Total emission colour (TEC) concentration of ZrO 2 :(0.01)Dy3+ phosphors were improved remarkably with the addition of charge compensators (A+), which would promote their applications in solid state lighting. The effective blue emission of the phosphors was changing with different co-dopant incorporation. Implying possible use of this material as a blue emitting phosphor as a blue emitting component in three-component white light-emitting diodes (WLEDs). [ABSTRACT FROM AUTHOR]
Titel: |
Synthesis, characterization, and enhanced photoluminescence of ZrO2:Dy3+ phosphors by incorporating Li+, Na+ and K+ ions for LED applications.
|
---|---|
Autor/in / Beteiligte Person: | Ponkumar, S. ; Prakashbabu, D. ; Parasuraman, K. ; Uthrakumar, R. ; Kaviyarasu, K. |
Zeitschrift: | Ceramics International, Jg. 50 (2024-04-20), Heft 8, S. 13219-13228 |
Veröffentlichung: | 2024 |
Medientyp: | academicJournal |
ISSN: | 0272-8842 (print) |
DOI: | 10.1016/j.ceramint.2024.01.233 |
Schlagwort: |
|
Sonstiges: |
|