Positive effect of codoping Yb3+ on the super-long persistent luminescence of Cr3+-doped zinc aluminum germanate. Issue 14 (1st October 2018)

• Record Type: Journal Article
• Authors: Zhang, Yi; Huang, Rui; Lin, Zhenxu; Li, Hongliang; Hou, Dejian; Song, Jie; Lin, Shaomin; Song, Chao; Lin, Huihong; Lin, Zewen
• Is Part Of: Ceramics international. Volume 44:Issue 14(2018)
• Page Start: 17377
• Page End: 17382
• Publication Date: 2018-10-01
• Subjects: Optical properties -- Spinels -- Functional applications -- Spectroscopy; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2018.06.202
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: A series of novel near-infrared (NIR) long persistent phosphors of Zn1.2 Al1.6 Ge0.2 O4 : Cr 3+, Yb 3+ was synthesized by a solid state method. The crystal structure of Zn1.2 Al1.6 Ge0.2 O4 was identified. Yb 3+ ions were effective codopants for improving the NIR persistent luminescence intensity even after 100 h of decay. The persistent luminescence decay curves and the thermo-luminescence spectra were analyzed. Results indicated that the increase in efficient electron trap concentration induced by doping Yb 3+ ions was a major factor in the improvement of the NIR persistent luminescence. Moreover, short-wave infrared (SWIR = 900–1700 nm) emission of Yb 3+ was be excited by UV and visible light through charge transfer transition of O 2- –Yb 3+ and energy transfer from Cr 3+ to Yb 3+, respectively.