Luminescence and energy transfer of Mn and Tb in Y3Al5O12 phosphors |
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Authors: | Zhongfei Mu Yihua Hu Haoyi WuChujun Fu Fengwen Kang |
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Affiliation: | a School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, PR China b Experimental Teaching Department, Guangdong University of Technology, Guangzhou 510006, PR China |
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Abstract: | Mn2+ is an excellent luminescent ion with variable color from green, yellow to red in different hosts and has been widely utilized in recent years. The luminescent intensity of Mn2+ in many hosts is so low that the correlative application is restricted. In the present paper, two methods, i.e. employing a charge compensator and introducing a sensitizer, were adopted to enhance the luminescence of Mn2+ in Y3Al5O12 (YAG). By employing Si4+ as a charge compensator, the doping content of Mn2+ (x) in Y3MnxAl5−2xSixO12 can be lifted up to 0.4. Mn2+ in YAG emits orange light in a broad band. The peak wavelength shifts from 586 to 593 nm with the increasing x. The luminescent intensity of Mn2+ reaches its maximum when x = 0.1. Co-doping Tb3+ into Mn2+ doped YAG, the sensitization effect of Tb3+ on Mn2+ was observed clearly. The resonance energy transfer from Tb3+ to Mn2+ occurs because there is a well overlapping between emission spectrum of Tb3+ and excitation spectrum of Mn2+. A reasonable explanation for the sensitization effect of Tb3+ on the luminescence of Mn2+ was brought forward. |
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Keywords: | Mn2+ and Tb3+ codoped YAG phosphors Luminescent properties Energy transfer |
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