Red enhanced YAG:Ce, Pr nanophosphor for white LEDs

被引：32

作者：

Chawla, Santa ^{[1
]}

Roy, Tapashree ^{[1
]}

Majumder, Kanishka ^{[1
]}

Yadav, Ashish ^{[1
]}

机构：

[1] Natl Phys Lab, Luminescent Mat & Devices Grp, New Delhi 110012, India

来源：

JOURNAL OF EXPERIMENTAL NANOSCIENCE | 2014年 / 9卷 / 08期

关键词：

photoluminescence; auto combustion synthesis; rare earth activator; white LED; SPECTRAL PROPERTIES; CE PHOSPHOR; EMISSION; LUMINESCENCE; TEMPERATURE; IONS;

D O I：

10.1080/17458080.2012.714481

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Rare earth ion Pr3+ was co doped in yellow emitting YAG:Ce nanophosphor to introduce red emission for improving colour rendering property of white LED. Nanocrystalline YAG:Ce, YAG:Ce, Pr was synthesised by a single step auto combustion process. Photoluminescence (PL) emission spectra of YAG:Ce, Pr nanophosphor, when excited by 460nm blue light, exhibited sharp red emission peaks at 610nm from Pr3+ ions in addition to broad yellow emission from Ce3+ peaking at 540nm due to charge transfer from excited Ce3+ 5d band to P-3(J)/D-1(2) level of Pr3+. Ce3+ (yellow) and Pr3+ (red) emission decays in tens of nanoseconds and microseconds, respectively. Electroluminescence spectra of blue LED with developed phosphor layer shows colour coordinates (0.30, 0.39) close to ideal white light.

引用

页码：776 / 784

页数：9

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