Deep red phosphors SrAl12O19:Mn4+, M (M = Li+, Na+, K+, Mg2+) for high colour rendering white LEDs. Issue 7 (3rd April 2013)

• Record Type: Journal Article
• Authors: Wang, Lei; Xu, Yudong; Wang, Di; Zhou, Rulong; Ding, Ning; Shi, Min; Chen, Yiqing; Jiang, Yang; Wang, Yuhua
• Is Part Of: Physica status solidi. Volume 210:Issue 7(2013:Jul.)
• Page Start: 1433
• Page End: 1437
• Publication Date: 2013-04-03
• Subjects: Solid state physics -- Periodicals; Solids -- Industrial applications -- Periodicals; 530.41
• DOI: 10.1002/pssa.201228815
• Languages: English
• ISSNs: 1862-6300

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="pssa201228815-sec-0001" sec-type="section"> <p>High‐saturated red phosphors Mn<sup>4+</sup>‐doped SrAl<sub>12</sub>O<sub>19</sub> were prepared by solid‐state reaction methods. The luminescent properties of SrAl<sub>12</sub>O<sub>19</sub>:Mn<sup>4+</sup> were systematically investigated. The excitation spectra indicated that SrAl<sub>12</sub>O<sub>19</sub>:Mn<sup>4+</sup> could be effectively excited by both NUV light and the blue light of LED chips. The emission spectra exhibit two sharp peaks in the deep‐red region. The effects of codoping ions, M = Li<sup>+</sup>, Na<sup>+</sup>, K<sup>+</sup>, Mg<sup>2+</sup>, on the luminescent properties of SrAl<sub>12</sub>O<sub>19</sub>:Mn<sup>4+</sup> were investigated, respectively. The results suggested that Mg<sup>2+</sup> could significantly improve the luminescent properties of SrAl<sub>12</sub>O<sub>19</sub>:Mn<sup>4+</sup>, and the phosphor SrAl<sub>12</sub>O<sub>19</sub>:Mn<sup>4+</sup>, Mg<sup>2+</sup> was demonstrated to be a potential candidate for high colour rendering white LEDs. <inline-graphic xlink:href="ark:/27927/pgg277v22tp" content-type="pssa201228815-gra-0001" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /></p> <p>CIE chromaticity diagram of different phosphors and luminescence of SrAl<sub>12</sub>O<sub>19</sub>:Mn<sup>4+</sup>, Mg<sup>2+</sup> phosphor (a). A commercial blue LED chip coated with SrAl<sub>12</sub>O<sub>19</sub>:Mn<sup>4+</sup>, Mg<sup>2+</sup> (b) and the luminance of SrAl<sub>12</sub>O<sub>19</sub>:Mn<sup>4+</sup>, Mg<sup>2+</sup> excited by a 365‐nm light source (c) (×: the CIE chromaticity of a blue chip LED+ YAG:Ce coated with SrAl<sub>12</sub>O<sub>19</sub>:Mn<sup>4+</sup>, Mg<sup>2+</sup>, 20 mA).</p> </sec> </abstract>