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Narrow-linewidth red-emission Eu3+-doped TiO2 spheres for light-emitting diodes

2016; American Institute of Physics; Volume: 119; Issue: 12 Linguagem: Inglês

10.1063/1.4944944

1520-8850

Peifen Zhu, Hongyang Zhu, Weiping Qin, Breno H. Dantas, Wei Sun, Chee-Keong Tan, Nelson Tansu,

Quantum Dots Synthesis And Properties

In this work, the amorphous Eu3+-doped TiO2 spheres were synthesized by low cost mixed-solvent method, while the anatase and rutile spheres can be obtained by annealing the as-synthesized amorphous TiO2 spheres at elevated temperatures. The optical properties of Eu3+-doped TiO2 spheres were also investigated, and strong red emission (centered at 610 nm) with narrow line-width of 30 nm was observed under 465 nm or 394 nm excitations for the Eu3+-doped anatase TiO2 spheres. Our findings indicate the potential of using Eu3+-doped TiO2 spheres to achieve red emission with InGaN blue light emitting diodes (LEDs). Owing to the high light extraction efficiency in the GaN-based LEDs using anatase TiO2 spheres as demonstrated in our previous works, this work shows the strong potential of Eu3+-doped TiO2 spheres as the red phosphor material for high efficiency GaN-based white light-emitting diode.