Effect of sintering temperature of Ce3+-doped Lu3Al5O12 phosphors on light emission and properties of crystal structure for white-light-emitting diodes

被引：1

作者：

Koizumi, Hiroshi ^{[1
,3
]}

Watabe, Junya ^{[2
]}

Sugiyama, Shin ^{[2
]}

Hirabayashi, Hideaki ^{[3
]}

Homma, Tetsuya ^{[1
]}

机构：

[1] Shibaura Inst Technol, Postgrad Courses Funct Control Syst, Koto Ku, 3-7-5 Toyosu, Tokyo 1358548, Japan

[2] Nemoto Lumi Mat Co Ltd, 4-1 Shinmachi, Hiratsuka, Kanagawa 2540076, Japan

[3] Corp Mfg Engn Ctr, Proc Technol Res Dept, Isogo Ku, 33 Shin Isogo Cho, Yokohama, Kanagawa 2350017, Japan

来源：

OPTICAL REVIEW | 2018年 / 25卷 / 03期

关键词：

Solid-phase synthesis; Luminescence; Green aluminate garnet; Ce3+; Lattice defect; White LEDs; LUMINESCENT PROPERTIES; CE3+; CERAMICS; MICROSTRUCTURE;

D O I：

10.1007/s10043-018-0431-6

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The effect of the sintering temperature of Ce3+-doped Lu3Al5O12(Ce-LuAG) phosphors on the emission and properties of the crystal structure was studied. A cathodoluminescence peak at 317 nm, which was assigned to lattice defects, was exhibited in addition to emission peaks at 508 and 540 nm for the Ce-LuAG phosphors. The intensities of the 317 nm emission peak for the phosphors with mean particle diameters of 5.0 and 10.0 mu m formed at a low sintering temperature of 1430 degrees C were higher than those for the phosphors with mean particle diameters of 18.0 and 20.5 mu m formed at a high sintering temperature of 1550 degrees C. In contrast, the electroluminescence spectra for fabricated white-light-emitting diodes (LEDs) using the phosphors revealed that the intensity of the peak at 540 nm was strong for the mean particle diameters of 18.0 and 20.5 mu m. The intensity of the 540 nm peak, which is attributed to the 4f -> 5d transition of the Ce3+ activator, showed a dependence on the sintering temperature. The relationship between the optical properties and the lattice defects is discussed.

引用

页码：340 / 348

页数：9

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