Blue-Green Mechanoluminescence of CaAl₂Si₂O₈:Eu²⁺ and CaAl₂Si₂O₈:Eu²⁺,Dy³⁺

Abstract:

This paper studied the mechanoluminescence of the CaAl₂Si₂O₈:Eu²⁺_x, Dy³⁺_y phosphors. The crystal structure, photoluminescence (PL) and mechanoluminescent intensity of the phosphors were investigated. The emission peak of CaAl₂Si₂O₈: Eu_x²⁺ had a redshift from 418 nm to 428 nm due to the increase of the crystal filed intensity around Eu²⁺ with the increase of Eu²⁺ ion content. The ML (mechanoluminescence) emission of CaAl₂Si₂O₈:Eu_0.01and CaAl₂Si₂O₈:Eu²⁺_0.01, Dy³⁺_0.02 can be seen by the naked eyeswhen compressive loads were appliedon the samples. Whats more, the addition of Dy³⁺can increase the ML intensity of CaAl₂Si₂O₈:Eu_0.01. The ML and PL spectra of the sample CaAl₂Si₂O₈:Eu²⁺_0.01, Dy³⁺_0.02 are identical, located at 428 nm.

• Periodical: Advanced Materials Research (Volume 815)
• Pages: 655-661
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.815.655
• Online since: October 2013
• Authors: Zhen Ming Chu, Yan Xia Li, Xu Sheng Wang, Xi Yao
• Keywords: Doping, Mechanoluminescence, Photoluminescence (PL)

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