Luminescence properties of Y2WO6:Eu incorporated with Mo or Bi ions as red phosphors for light-emitting diode applications |
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Authors: | Lianhua Tian Ping Yang Fengyue Li |
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Institution: | a Department of Physics, Yanbian University, Yanji 133002, China b State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou 510275, China |
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Abstract: | In this study, the red phosphors, Y2W1−xMoxO6:Eu3+ and Y2WO6:Eu3+,Bi3+, have been investigated for light-emitting diode (LED) applications. In Y2WO6:Eu3+, the excitation band edge shifts to longer wavelength with the incorporation of Mo6+ or Bi3+ ions. The emission spectra exhibit 5D0→7F1 and 5D0→7F2 transition of Eu3+ ion at 588, 593, and 610 nm, respectively. Moreover, the bluish-green luminescence of the WO66− at about 460 nm is observed to decrease with the incorporation of Mo6+, which results in pure red color. Thus, this study shows that the red phosphor, Y2WO6:Eu3+, incorporated with Mo6+ or Bi3+ ions is advantageous for LEDs applications. |
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Keywords: | Y2W1&minus xMoxO6:Eu3+ Y2WO6:Eu3+Bi3+ Light-emitting diode Energy migration |
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