A study on thermal quenching mechanism in Sr2Si5N8 :Eu red phosphors with different Eu concentration

Lei Chen; Ze Jiang; Ronghui Liu; Gang Jing; Yan Liu; Jintian Lin

doi:10.1117/12.2563484

17 April 2020 A study on thermal quenching mechanism in Sr₂Si₅N₈ :Eu red phosphors with different Eu concentration

Lei Chen, Ze Jiang, Ronghui Liu, Gang Jing, Yan Liu, Jintian Lin

Proceedings Volume 11455, Sixth Symposium on Novel Optoelectronic Detection Technology and Applications; 1145523 (2020) https://doi.org/10.1117/12.2563484
Event: Sixth Symposium on Novel Photoelectronic Detection Technology and Application, 2019, Beijing, China

Abstract

Eu doped Sr₂Si₅N₈ red phosphors with different Eu concentration were synthesized by high-temperature solid phase method. The crystal structure, luminescence and the thermal quenching properties were investigated in detail. It was found that the thermal quenching property was largely dependent on the Eu concentration. Interestingly, the thermal quenching property for low concentration Eu doped Sr₂Si₅N₈ was greatly improved as increasing Eu concentration. In order to understand the relevant mechanism, we examined the change of relative intensity and fluorescence lifetime for the two-peak emission in Sr₂Si₅N₈: Eu. The result revealed that Eu distribution changed with increasing Eu concentration, which should be the mainly mechanism of the thermal quenching behavior for low concentration Eu doped Sr₂Si₅N₈ phosphors.

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Lei Chen, Ze Jiang, Ronghui Liu, Gang Jing, Yan Liu, and Jintian Lin "A study on thermal quenching mechanism in Sr₂Si₅N₈ :Eu red phosphors with different Eu concentration", Proc. SPIE 11455, Sixth Symposium on Novel Optoelectronic Detection Technology and Applications, 1145523 (17 April 2020); https://doi.org/10.1117/12.2563484

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KEYWORDS

Europium

Ions

Luminescence

Strontium

Light emitting diodes

Crystals

Doping

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