Back to Search
Start Over
Photoluminescence properties of novel red-emitting NaSrBO3:Eu3+ phosphor for near-UV light-emitting diodes
- Source :
-
Optics & Laser Technology . Mar2013, Vol. 46, p14-19. 6p. - Publication Year :
- 2013
-
Abstract
- Abstract: A series of NaSrBO3:xEu3+ and NaSr1−2x BO3:xEu3+, xM+ (M=Li, Na, K) phosphors were synthesized by the solid state reaction. The crystal structure, photoluminescence properties and concentration quenching of NaSrBO3:Eu3+ phosphors were systematically investigated. The excitation spectra indicate that the phosphors can be efficiently excited by 394nm, which is matched well with the emission wavelength of near-UV LED chip. All the samples show the characteristic red emission of Eu3+ ions (5D0→7F J , J=0, 1, 2, 3 and 4). The maximum intensity of luminescence is observed at the Eu3+ concentration around x=0.11. The concentration quenching of Eu3+ in NaSrBO3:Eu3+ phosphor can be mainly attributed to quadrupole–quadrupole interaction. The relative emission intensities of Eu3+ (5D0→7F2) in NaSrBO3:Eu3+ phosphors with Li+, Na+ or K+ introduced as charge compensator are significantly enhanced, and the phosphors added with K+ ions show the strongest emission. The emission intensities of NaSr1−2x BO3:xEu3+, xM+ (M=Li, Na, K) are about 1.47, 1.64 and 2.08 times than that of commercial red phosphor Y2O2S:Eu3+. These results indicate that NaSr1−2x BO3:xEu3+, xM+ (M=Li, Na, K) phosphors exhibit potential applications in the field of near-UV LED as an efficient red-emitting phosphors. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00303992
- Volume :
- 46
- Database :
- Academic Search Index
- Journal :
- Optics & Laser Technology
- Publication Type :
- Academic Journal
- Accession number :
- 82265089
- Full Text :
- https://doi.org/10.1016/j.optlastec.2012.04.015