Fabrication of Electroluminescent Devices Using Nanocrystalline Oxide Phosphors

Abstract:

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Nanosized Y2O3:Eu3+ crystalline powders with average particle sizes around 100 nm, measured by field-emission scanning electron microscopy (FE-SEM), have been synthesized by a polymerized precursor method using carboxymethyl cellulose (CMC). The nanocrystalline phosphors exhibit intense photoluminescence (PL) and cathodoluminescence (CL) around 612 nm, being attributed to the 5D0-7F2 transition of Eu3+. Electroluminescence (EL) properties of the nanophosphors in the form of thick films were investigated, and emission of red light with maximum intensity at 612 nm (corresponding to x = 0.57 and y = 0.32 in the CIE chromaticity diagram) was observed under high ac field at 1 kHz. The obtained results suggest a possibility that Y2O3:Eu3+ nanopowders can be used as a red-emitting phosphor for EL devices.

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Periodical:

Edited by:

Kazumi Kato, Tadashi Takenaka, Masasuke Takata and Kazuo Shinozaki

Pages:

123-126

DOI:

10.4028/www.scientific.net/KEM.388.123

Citation:

R. Fujiwara et al., "Fabrication of Electroluminescent Devices Using Nanocrystalline Oxide Phosphors", Key Engineering Materials, Vol. 388, pp. 123-126, 2009

Online since:

September 2008

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Price:

$35.00

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