| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1494162 | Optical Materials | 2014 | 4 Pages |
•LaBSiO5 doped with Eu3+, Al3+ were synthesized by the solid state method.•The emission intensity of LaBSiO5:Eu3+ was enhanced by introducing Al3+ ions.•La0.70B0.75SiO5:0.3Eu3+, 0.25Al3+ has intense red emission excited by 395 nm light.•Intense red light can be observed from the red LEDs based on these red phosphors.
Red-emitting phosphors LaBSiO5:Eu3+ and LaBSiO5:Eu3+, Al3+ were synthesized by the conventional solid state method at 1100 °C. The structure and luminescent properties of these phosphors are investigated. LaBSiO5:Eu3+ and LaBSiO5:Eu3+, Al3+ could be efficiently excited by near ultraviolet light with the strongest excitation peak at 395 nm. The main emission peak is located at around 616 nm, which corresponds to the transition of 5D0 → 7F2 of Eu3+ ions. The emission intensity of LaBSiO5:Eu3+ was enhanced by introducing Al3+ ions. Compared with Y2O2S:0.05Eu3+, the sample La0.70B0.75SiO5:0.30Eu3+, 0.25Al3+ shares the intense red emission, and its emission intensity is about 3.8 times as strong as that of Y2O2S:0.05Eu3+ under 395 nm light excitation. Bright red light can be observed from the red LED based on La0.70B0.75SiO5:0.30Eu3+, 0.25Al3+, hence La0.70B0.75SiO5:0.30Eu3+, 0.25Al3+ maybe find application on near-UV InGaN-based white LEDs.
Graphical abstractThe emission intensities of La0.70B1−ySiO5:0.30Eu3+, yAl3+ were enhanced by introducing Al3+ ions with the emission at ∼616 nm, bright red light can be observed from the red LEDs based on La070.BSiO5:0.30Eu3+ (b) and La0.70B0.75SiO5:0.30Eu3+, 0.25Al3+(c).Figure optionsDownload full-size imageDownload high-quality image (170 K)Download as PowerPoint slide
