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- W3036681921 abstract "The thermal stability of the 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 the Mn2+ ions was analyzed by combining the results of photoluminescence excitation spectroscopy and Tanabe-Sugano diagrams. By comparing the results of X-ray photoelectron spectroscopy, two additional bands centered at about 129.8 eV and 130.7 eV were found in the Eu2+-doped sample, which corresponded to the chemical states of P 2p3/2 and P 2p1/2. Two different sets of emission spectra were observed for Sr9MnLi(PO4)7:5%Eu2+ (SMPO:Eu2+) on 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 are given in this work. Systematic research on the luminescent properties of Eu2+ and Mn2+ ions in the SMPO:Eu2+ phosphor contributes to the understanding of the thermal stability and aids in the development of Mn2+-based red-emitting phosphors." @default.
- W3036681921 created "2020-06-25" @default.
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- W3036681921 date "2020-01-01" @default.
- W3036681921 modified "2023-10-17" @default.
- W3036681921 title "Investigation of the thermal quenching of two emission centers in Sr<sub>9</sub>MnLi(PO<sub>4</sub>)<sub>7</sub>:Eu<sup>2+</sup> using time-resolved technique" @default.
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- W3036681921 doi "https://doi.org/10.1039/d0cp02544e" @default.
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