Luminescence of Tb₃Al₅O₁₂ phosphors co-doped with Ce³⁺/Gd³⁺ for white light-emitting diodes

• Yu-Guo Yang,
• Lei Wei,
• Jian-Hua Xu,
• Hua-Jian Yu,
• Yan-Yan Hu,
• Hua-Di Zhang,
• Xu-Ping Wang,
• Bing Liu,
• Cong Zhang and
• Qing-Gang Li

Beilstein J. Nanotechnol. 2019, 10, 1237–1242, doi:10.3762/bjnano.10.123

• : luminescence; Tb3Al5O12:Ce3+/Gd3+; white light-emitting diodes (WLEDs); Introduction Currently, the most popular fabrication model of white light-emitting diodes (WLEDs) is to combine blue chips with yellow Y3Al5O12:Ce3+ phosphors, which has the disadvantages of low colour-rendering index (CRI) and high

• +–O2− bond length in Tb3Al5O12:Ce3+/Gd3+ decreases when Tb3+ ions are replaced by Gd3+ ions. The decrease of the Ce3+–O2− bond length results in an increase of the crystal field splitting, which in turn leads to the red-shift of the Ce3+ emission. This result is in accordance with the excitation