1. Near-infrared photoluminescence and phosphorescence properties of Cr3+-Doped garnet-type Y3Sc2Ga3O12.
- Author
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Yang, Xian, Chen, Weibin, Wang, Dongsheng, Chai, Xirong, Xie, Gening, Xia, Zhiguo, Molokeev, Maxim S., Liu, Yingliang, and Lei, Bingfu
- Subjects
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LIGHT emitting diodes , *PHOSPHORESCENCE , *PHOTOLUMINESCENCE , *THERMOLUMINESCENCE , *LIGHT sources , *EXCITATION spectrum , *LUMINESCENCE - Abstract
Garnet-type Y 3 Sc 2 Ga 3 O 12 :Cr3+ phosphor has been synthesized by a solid-state reaction. XRD result revealed the successful phase formation and Cr3+ doping in Y 3 Sc 2 Ga 3 O 12. The excitation spectrum at about 260, 450, and 630 nm corresponded to three spin-allowed Cr3+ d - d intra-transitions of 4A 2 -4T 1 (4P), 4A 2 -4T 1 (4F), and 4A 2 -4T 2 (4F), respectively, among which the near infrared (NIR) emission peak at around 740 nm is identified. Moreover, the phosphorescence emission property, thermoluminescence and related luminescence mechanisms are discussed as well. The fabricated NIR phosphor-converted light-emitting diodes (pc-LEDs) suggest its potential of Y 3 Sc 2 Ga 3 O 12 :Cr3+ phosphor for non-visible light source application. • Garnet-type Y 3 Sc 2 Ga 3 O 12 :Cr3+ phosphor has been synthesized by solid-state reaction in air. • The Y 3 Sc 2 Ga 3 O 12 :Cr3+ phosphor exhibit both intense near infrared (NIR) and long persistent luminescence phenomenon. • The trap type and depth were also discussed according to thermoluminescence glow curves. • The possible fluorescence and long persistent luminescence mechanism in Y 3 Sc 2 Ga 3 O 12 :Cr3+ phosphors are analyzed. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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