White-light-emitting diodes based on Ba2+ co-doped Sr3SiO5: Ce3+, Li+ phosphor

Changyu Shen; Ke Li; Yi Yang

doi:10.1117/12.849964

25 November 2009 White-light-emitting diodes based on Ba²⁺ co-doped Sr₃SiO₅: Ce³⁺, Li⁺ phosphor

Changyu Shen, Ke Li, Yi Yang

Proceedings Volume 7635, Display, Solid-State Lighting, Photovoltaics, and Optoelectronics in Energy; 76350K (2009) https://doi.org/10.1117/12.849964
Event: Asia Communications and Photonics, 2009, Shanghai, Shanghai , China

Abstract

A yellow-orange-emitting Ba²⁺ codoped Sr₃SiO₅: Ce³⁺, Li⁺ phosphor was prepared by high-temperature solid-state reaction. Through transitions of 5d→4f in Ce³⁺, the phosphor showed a very broad and strong yellow emission under near ultraviolet (UV) or blue light excitation. The shifts of the emission band to longer wavelength (yellow-orange) of the Sr₃SiO₅: Ce³⁺, Li⁺ yellow phosphor under the 450-470 nm excitation range have been achieved by adding the element Ba²⁺ in the Sr₃SiO₅ host. White light could be obtained by combining this phosphor with 460nm light-emitting diodes. As the concentrations of the Ba²⁺, Ce³⁺ and Li⁺ ions in the phosphor were 0.35mol, 0.024mol and 0.024mol respectively, the InGaN-based Ba2+ codoped Sr₃SiO₅: Ce³⁺, Li⁺ LED presented intense white emitting and good color rendering of 88.

Citation Download Citation

Changyu Shen, Ke Li, and Yi Yang "White-light-emitting diodes based on Ba²⁺ co-doped Sr₃SiO₅: Ce³⁺, Li⁺ phosphor", Proc. SPIE 7635, Display, Solid-State Lighting, Photovoltaics, and Optoelectronics in Energy, 76350K (25 November 2009); https://doi.org/10.1117/12.849964

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