Photoluminescence studies of Eu3+ doped Y2O3 nanophosphor prepared by microwave hydrothermal method.

Autor:	Vadivel Murugan, A., Viswanath, Annamraju Kasi, Ravi, V., Kakade, Bhalchandra A., Saaminathan, V.
Předmět:	PHOTOLUMINESCENCE HYDROTHERMAL alteration ELECTRON microscopy NANOCRYSTALS PARTICLES (Nuclear physics)
Zdroj:	Applied Physics Letters; 9/18/2006, Vol. 89 Issue 12, p123120, 3p, 1 Black and White Photograph, 2 Graphs
Abstrakt:	In this letter, the authors report the photoluminescence studies of Eu3+ doped Y2O3 nanorods, which have been synthesized by rapid microwave hydrothermal route within 6 min. The nanostructured Eu3+ doped Y2O3 is characterized by x-ray diffraction, transmission electron microscopy, and photoluminescence. The emission spectrum shows transitions from the excited 5D0 state to 7FJ (J=0,1,2,3,4) levels of the Eu3+ ion. The most intense peak around 612 nm is due to the 5D0→7F2 transition, expected from the Judd-Ofelt selection rules [B. R. Judd, Phys. Rev. 127, 750 (1962); G. S. Ofelt, J. Chem. Phys. 37, 511 (1962)]. Photoluminescence measurements demonstrated that the nanocrystalline Eu3+:Y2O3 phase shows higher photoluminescence intensity. [ABSTRACT FROM AUTHOR]
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