Investigation of photoluminescence properties, thermal stability, energy transfer mechanisms and quantum efficiency of Ca 2 ZnSi 2 O 7 : Dy 3+ , Eu 3+ phosphors
| Autor: | J. Manam, Kanchan Mondal |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Photoluminescence Doping Biophysics Analytical chemistry Phosphor 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Biochemistry Atomic and Molecular Physics and Optics law.invention Solid-state lighting Tetragonal crystal system law 0103 physical sciences Activator (phosphor) Quantum efficiency Thermal stability 0210 nano-technology |
| Zdroj: | Journal of Luminescence. 195:259-270 |
| ISSN: | 0022-2313 |
| DOI: | 10.1016/j.jlumin.2017.11.028 |
| Popis: | Undoped, Dy3+ doped and Dy3+, Eu3+ co-doped Ca2ZnSi2O7 (CZS) phosphors were successively prepared using the solid state reaction method. The XRD and FE-SEM results revealed that the prepared phosphors have tetragonal crystal structure and agglomeration of particles. The energy band gaps of doped and co-doped phosphors were found to be increased as compared to undoped CZS. From the PL spectra, it was found that the energy transfer from sensitizer (Dy3+) to activator (Eu3+) ion in co-doped CZS: Dy3+, Eu3+ phosphors were mainly due to quadrupole-quadrupole interaction. The prepared CZS: Dy3+, Eu3+ phosphor the emission intensity retained almost 80% at 425 K of that measured at 300 K. The emission color had tuned with the incorporated of Eu3+ ion in CZS: Dy3+ phosphor. The quantum efficiency of CZS: Dy3+, Eu3+ phosphor is 12.88%. All the results of CZS: Dy3+, Eu3+ phosphors showed a great potential application as a white-emitting phosphor for solid state lighting application. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect