Photoluminescence properties and energy transfer of Ce3+–Tb3+ co-doped SrAlF5 nanorods by a hydrothermal method. Issue 35 (16th August 2017)

• Record Type: Journal Article
• Authors: Zhang, Wei; Hua, Ruinian; Qi, Xiaohui; Zhao, Jun; Qin, Lizhong; Liu, Tianqing
• Is Part Of: CrystEngComm. Volume 19:Issue 35(2017)
• Page Start: 5214
• Page End: 5222
• Publication Date: 2017-08-16
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/c7ce01054k
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : SrAlF5 :Ce 3+, Tb 3+ nanorods were synthesized via a mild hydrothermal process and the energy transfer from Ce 3+ to Tb 3+ was analyzed. Abstract : Ce 3+ and Tb 3+ co-doped SrAlF5 nanorods were synthesized via a mild hydrothermal method. The XRD results show that the prepared samples are single-phase. FE-SEM reveals the high uniformity of the as-synthesized nanorods (∼1 μm in length and ∼50 nm in diameter). The effect of reaction conditions on the morphology of SrAlF5 was studied. When excited at 254 nm, contrasting weak emission signals of SrAlF5 :Tb 3+ were observed, while SrAlF5 :Ce 3+, Tb 3+ nanorods exhibited the strong green emission of Tb 3+ ions. The energy transfer between Ce 3+ and Tb 3+ was observed and studied. The mechanism of energy transfer was deduced to be the electric dipole–dipole interaction in the SrAlF5 host. The optimum doping concentration of Ce 3+ ions is 7 mol% in SrAlF5 :0.01Tb 3+ . The fluorescence decay curves for Ce 3+ and Tb 3+ of SrAlF5 :Ce 3+, Tb 3+ nanorods were measured at room temperature. The lifetime of Ce 3+ is in the range from 78.6 to 1.2 ns and the lifetime of Tb 3+ varies from 4.39 to 7.39 ms. The energy transfer efficiency from Ce 3+ to Tb 3+ was calculated using lifetime and emission spectra. The chromaticity coordinates of all the samples were calculated and the chromaticity coordinates of SrAlF5 :0.06Ce 3+, 0.01Tb 3+ are very near those of the European broadcasting union (EBU) primary green color (0.29, 0.60).