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Synthesis and photoluminescence properties of Eu 2 þ doped Sr 9 Sc ( PO 4 ) 7 phosphors for white light-emitting diodes
| Content Provider | Semantic Scholar |
|---|---|
| Author | Donga, Xiaoling Zhanga, Jiahua Zhanga, X. B. Haoa, Zhendong Lva, Shaozhe |
| Copyright Year | 2014 |
| Abstract | A series of Eu2þ -activated Sr9Sc(PO4)7 yellowish-green emitting phosphors were synthesized by conventional solid-state reaction. The photoluminescence (PL) properties and concentration quenching mechanism of the as-prepared phosphors were investigated. The emission spectrum exhibits a broad and asymmetric band peaking at 510 nm, which corresponds to the 4f5d-4f transition of Eu2þ . The excitation spectrum exhibits a broad band extending from 250 to 450 nm, which matches well with the emission of near ultraviolet (n-UV) chips (350– 430 nm). Non-radiative transitions between Eu2þ ions in the Sr9Sc(PO4)7 host have been demonstrated to be attributable to dipole–dipole interactions, and the critical distance was calculated to be 23.1 Å. These results indicate that Sr9Sc(PO4)7:Eu 2þ phosphor could serve as a promising candidate for application in n-UV white-light LEDs. & 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://ir.ciomp.ac.cn/bitstream/181722/44427/1/Dong-2014-Synthesis%20and%20photol.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
