期刊
JOURNAL OF RARE EARTHS
卷 28, 期 6, 页码 878-882出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S1002-0721(09)60226-X
关键词
Eu3+-activated Gd-2(MoO4)(3) phosphors; pseudo-pompon-shaped; red-emitting; photoluminescent properties; solid-state lighting; rare earths
资金
- Jiangsu Higher Education Institutions [08KJD150014]
- QingLan Project of the Jiangsu Province
- Jiangsu Teachers University of Technology [KYY09031]
Eu3+-activated Gd-2(MoO4)(3) pseudo-pompon-like red-emitting phosphors were prepared by solid-state method. The structure, morphology, and luminescent properties of these powder samples were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), and fluorescent spectrophotometry, respectively. The as-obtained phosphors were single crystalline phase with orthorhombic unit cell. The particles of the powder samples had the length of 5-12 mu m and width of 3-7 mu m with flake shape and large surface area, which is suitable for manufacture of white LEDs. The phosphor could be efficiently excited by the incident light of 348-425 nm, well matched with the output wavelength of near-UV (In,Ga)N chip, and re-emitted an intense red light peaking at 615 nm. By combing this phosphor with a similar to 395 nm-emitting (In,Ga)N chip, a red LED was fabricated, so that the applicability of this novel phosphor to white LEDs was confirmed. It is considered to be an efficient red-emitting conversion phosphor for solid-state lighting based on (In,Ga)N LEDs.
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