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Theoretical design and characterization of high efficient Sr9Ln(PO4)7: Eu2+ phosphors
Materials Research Bulletin ( IF 5.4 ) Pub Date : 2020-07-01 , DOI: 10.1016/j.materresbull.2020.110856
Dorim Kim , Yeon Woo Seo , Sung Heum Park , Byung Chun Choi , Jung Hwan Kim , Jung Hyun Jeong

Abstract Substitution of Ln site in Sr9Ln(PO4)7: Eu2+ [Ln = Sc, Lu, Y, La] matrix prepared from powder-based precursors were designed for the first time. By modulating the lanthanide such as Sc, Lu, Y and La, the corresponding luminescence varied hues from yellow to blue light under 360 nm excitation. The Rietveld refinement verified the successful substitution for Ln3+ site, and the samples crystallized with the space group of I2/a for Sc, Lu, Y and R-3m for La, respectively. The internal quantum yield was found to be 24 %, 87 %, 91 %, and 100 %, respectively. The highest quantum yield phosphor of Sr9La(PO4)7: Eu2+ has potential to overcome the low efficiency of the commercial phosphors. Moreover, it possesses a high thermal quenching behavior up to 90 % emission at 423 K compared to room temperature. Therefore, a series of Sr9Ln(PO4)7: Eu2+ phosphors are expected to be exploration of technologically important material as excellent wavelength-conversion phosphor.

中文翻译:

高效 Sr9Ln(PO4)7: Eu2+ 荧光粉的理论设计和表征

摘要 首次设计了由粉末基前驱体制备的Sr9Ln(PO4)7:Eu2+ [Ln = Sc, Lu, Y, La]基体中Ln位点的取代。通过调制 Sc、Lu、Y 和 La 等镧系元素,相应的发光在 360 nm 激发下从黄色变为蓝色。Rietveld 精修验证了 Ln3+ 位点的成功取代,样品分别以 I2/a 空间群结晶为 Sc、Lu、Y 和 R-3m 为 La。发现内部量子产率分别为 24%、87%、91% 和 100%。Sr9La(PO4)7:Eu2+ 的最高量子产率磷光体有可能克服商业磷光体的低效率。此外,与室温相比,它在 423 K 下具有高达 90% 的高热猝灭行为。因此,一系列的 Sr9Ln(PO4)7:
更新日期:2020-07-01
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