Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.



Investigation of thermal quenching of two emission centers in Sr9MnLi(PO4)7:Eu2+ using time-resolved technique

Abstract

The thermal stability of phosphors in phosphor-converted light-emitting diodes (LEDs) plays an important role in the practical application of lighting. Herein, the Mn2+ based red-emitting phosphors of pure and Eu2+ doped Sr9MnLi(PO4)7 (SMPO) samples were prepared using the high temperature solid-state reaction method. The crystal field environment around Mn2+ ions was analyzed by combining the results of photoluminescence excitation spectrum and Tanabe-Sugano diagram. By comparing the results of X-ray photoelectron spectroscopy, two additional bands centered at 129.8 eV and 130.7 eV were found in Eu2+ doped sample, that corresponded to the chemical states of P 2p3/2 and P 2p1/2. Two different sets of emission spectra were observed in Sr9MnLi(PO4)7:5%Eu2+ (SMPO:Eu2+) employing the time-resolved technique. The emission peaks centered at 615 nm and 661 nm were attributed to Mn2+ and Eu2+ ions, respectively. The thermal quenching behaviors of Eu2+ and Mn2+ were investigated in the temperature range of 300-620 K, and the thermal quenching mechanisms were given in this work. The systematic research on luminescent properties of Eu2+ and Mn2+ ions in SMPO:Eu2+ phosphor contribute to providing an understanding of thermal stability, and conduce to the development of Mn2+ based red-emitting phosphors.

Back to tab navigation

Supplementary files

Article information


Submitted
10 May 2020
Accepted
18 Jun 2020
First published
18 Jun 2020

Phys. Chem. Chem. Phys., 2020, Accepted Manuscript
Article type
Paper

Investigation of thermal quenching of two emission centers in Sr9MnLi(PO4)7:Eu2+ using time-resolved technique

F. Chi, W. Dai, B. Jiang, B. Lou, X. Wei, B. Li, J. Cheng, S. Liu and M. Yin, Phys. Chem. Chem. Phys., 2020, Accepted Manuscript , DOI: 10.1039/D0CP02544E

Social activity

Search articles by author

Spotlight

Advertisements