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Red enhanced YAG:Ce, Pr nanophosphor for white LEDs

Red enhanced YAG:Ce, Pr nanophosphor for white LEDs
Red enhanced YAG:Ce, Pr nanophosphor for white LEDs
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 3PJ/1D2 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.
1745-8080
776-784
Chawla, Santa
82eb65bd-359e-45a6-a18b-2b2fdf5fefaf
Roy, Tapashree
094726f3-177b-468a-be7a-f299d6c4fef5
Majumder, Kanishka
5678231c-ee9e-49fe-802e-6fa25009f91e
Yadav, Ashish
4a5948aa-1682-4893-9889-843437dd7c9b
Chawla, Santa
82eb65bd-359e-45a6-a18b-2b2fdf5fefaf
Roy, Tapashree
094726f3-177b-468a-be7a-f299d6c4fef5
Majumder, Kanishka
5678231c-ee9e-49fe-802e-6fa25009f91e
Yadav, Ashish
4a5948aa-1682-4893-9889-843437dd7c9b

Chawla, Santa, Roy, Tapashree, Majumder, Kanishka and Yadav, Ashish (2014) Red enhanced YAG:Ce, Pr nanophosphor for white LEDs. Journal of Experimental Nanoscience, 9 (8), 776-784. (doi:10.1080/17458080.2012.714481).

Record type: Article

Abstract

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 3PJ/1D2 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.

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More information

e-pub ahead of print date: 20 September 2012
Published date: 2014
Organisations: Optoelectronics Research Centre
Learn more about Optoelectronics Research Centre research

Identifiers

Local EPrints ID: 356465
URI: http://eprints.soton.ac.uk/id/eprint/356465
DOI: doi:10.1080/17458080.2012.714481
ISSN: 1745-8080
PURE UUID: fed31e48-7263-4375-9dee-eaa68f8f87b2

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Date deposited: 16 Sep 2013 11:09
Last modified: 14 Mar 2024 14:49

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Contributors

Author: Santa Chawla
Author: Tapashree Roy
Author: Kanishka Majumder
Author: Ashish Yadav

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