Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 27th March 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 7, 2019
Previous Article Next Article

Density-functional theory calculations, luminescence properties and fluorescence ratiometric thermo-sensitivity for a novel borate based red phosphor: NaBaSc(BO3)2:Ce3+,Mn2+

Author affiliations

Abstract

In this work, a novel borate based red phosphor NaBaSc(BO3)2 (NBS):Ce3+,Mn2+ was designed and successfully synthesized by a solid-state reaction. The formation energies of four different substitutional defects CeBa, CeNa, CeSc1 and CeSc2 were calculated by density-functional theory (DFT) calculations. In the meantime, Ce3+ ions occupying three different crystalline sites (Ba, Na and Sc1/Sc2) were analyzed by combining Gaussian fitting and Time-Resolved PhotoLuminescence (TRPL) mapping. On the other side, based on the effective energy transfer from Ce3+ to Mn2+, NBS:Ce3+,Mn2+ shows a broad absorption in the UV region (240 to 420 nm) and the emission intensity of Mn2+ is greatly improved (about 130 times than that of NBS:Mn2+). The mechanism of energy transfer from Ce3+ to Mn2+ was defined as dipole–dipole interaction by the Inokuti–Hirayama model. In addition, a white LED lamp with a good color rendering index (84.36) and a low color temperature (3784 K) was manufactured by using a 380 nm UV LED chip with a blend of BaMgAl10O17:Eu2+, (Sr,Ba)SiO4:Eu2+ and NBS:Ce3+,Mn2+. Meanwhile, under 370 nm excitation, the fluorescent intensity ratio of NBS:0.02Ce3+,0.03Mn2+ shows a linear correlation in the range of temperature from 298 K to 473 K with a high sensitivity of 3.16% K−1. Above all, our results provide a novel reference to develop Mn2+-based phosphors and an effective way to analyse the distribution of the doped elements in these compounds.

Graphical abstract: Density-functional theory calculations, luminescence properties and fluorescence ratiometric thermo-sensitivity for a novel borate based red phosphor: NaBaSc(BO3)2:Ce3+,Mn2+

Back to tab navigation

Supplementary files

Publication details

The article was received on 30 Nov 2018, accepted on 15 Jan 2019 and first published on 16 Jan 2019


Article type: Paper
DOI: 10.1039/C8TC06034G
Citation: J. Mater. Chem. C, 2019,7, 1982-1990

  •   Request permissions

    Density-functional theory calculations, luminescence properties and fluorescence ratiometric thermo-sensitivity for a novel borate based red phosphor: NaBaSc(BO3)2:Ce3+,Mn2+

    W. Geng, X. Zhou, J. Ding and Y. Wang, J. Mater. Chem. C, 2019, 7, 1982
    DOI: 10.1039/C8TC06034G

Search articles by author

Spotlight

Advertisements