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- Title
Ce<sup>3+</sup>/Mn<sup>2+</sup>共掺Ca<sub>3</sub>Y(PO<sub>4</sub>)<sub>3</sub> 红色荧光粉 的制备及其能量传递.
- Authors
冯宁宁; 阳结根; 杨子錢; 张佩雪; 王春兰
- Abstract
In order to improve the red light loss in wite LED phosphors, a novel single-phase Ce3+/Mn2+ co-doped Ca3Y (PO4)3 red-phosphor was successfully prepared via a high temperature solid-state method. The study shows that after calcining at 1 350 ℃ for 10 h, the required samples could be synthesized only by the condition of rapid cooling, which can be demonstrated by X-ray diffraction (XRD) analysis. Upon 325 nm excitation, the emission spectra of Ca3Y (PO4)3:Ce3+, Mn2+ samples have two emitting centers at about 383 nm and 620 nm, respectively, corresponding to the electron transition of 5d-4f of Ce3+ as well as4T1 (4G)-6A1 (6S) of Mn2+. As Mn2+-doping concentration increases, the luminescent colour of the sample gradually moves from blue light to red light, until the concentration of Mn2+ ion reaches 0.12 mol, and the chromaticity coordinate of the sample is (0.406, 0.221) in the red light part, which is due to the energy transfer of Ce3+→Mn2+ ions, whose energy transfer mechanism is the electric quadrupole-quadrupole interaction. Moreover, the crystal field environment at the Mn2+ luminescence center is changed because of the influence of Mn2+ doping concentration, resulting in the red shift of its emitting center from 615 to 627 nm. Based on the above analysis, a novel single-phase Ca3Y (PO4)3: Ce3+, Mn2+ red phosphor is synthesized, which owns potential application value in the phosphors-converted white light-emitting-diodes (LEDs).
- Subjects
ELECTRON transitions; ENERGY transfer; REDSHIFT; LUMINESCENCE; BLUE light; PHOTOLUMINESCENCE; MOLECULAR spectra; PHOSPHORS
- Publication
Basic Sciences Journal of Textile Universities / Fangzhi Gaoxiao Jichu Kexue Xuebao, 2019, Vol 32, Issue 3, p270
- ISSN
1006-8341
- Publication type
Article
- DOI
10.13338/j.issn.1006-8341.2019.03.007