Abstract
Gd2O3:Dy3+, Tb3+, Eu3+ polychromatic luminescence phosphors with novel cylindrical morphology were successfully prepared by means of solvothermal method and subsequent calcination process. XRD results showed that the samples were all cubic Gd2O3 phase, and the introduction of rare earth dopant did not change the crystal structure of Gd2O3. FE-SEM results showed that the samples were all cylinder with slightly rough surface after calcination, and the main shape remained unchanged. Through PL, it is proved that there exists Dy3+→Tb3+ and Tb3+→Eu3+ energy transfer in Dy3+, Tb3+ co-doped Gd2O3 and Tb3+, Eu3+ co-doped Gd2O3, respectively. In addition, dipole-dipole interaction is the main interaction mode in the two systems. The tunable multicolor luminescence of Gd2O3:Dy3+, Tb3+, Eu3+ was achieved by altering the type of doped ions, increasing the amount of doped ions and changing the excitation wavelength, which has a great application prospect in the field of full-color display.
Published Version
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