A Yellow-Emitting Oxynitride Phosphor: Ce4-xCaxSi12O3+xN18-x:Eu2+

作者：Park Woon Bae^*; Jeong Young Soo; Singh Satendra Pal; Sohnz Kee Sun

来源：ECS Journal of Solid State Science and Technology, 2013, 2(2): R3100-R3106.

DOI：10.1149/2.013302jss

A novel phosphor, Ce4-xCaxSi12O3+xN18-x:Eu2+ (x = 1.4), that emits a yellow light was discovered during the first attempt to adopt Ce3+ as a host constituent rather than as an activator. A so-called particle swarm optimization-assisted combinatorial materials search (PSOCMS) was executed at three different firing temperatures in the CeO2-CaO-Si3N4-Eu2O3 quaternary composition search space to facilitate the discovery process, which made it possible to pinpoint the Ce4-xCaxSi12O3+xN18-x:Eu2+ (x = 1.4) phosphor. Structural analysis revealed that this unique phosphor had a monoclinic lattice in the C2 space group with the lattice parameters a = 18.54268(4), b = 4.840398(11), c = 10.700719(18), and beta = 108.25660(17). The discovered phosphor exhibited brilliant performance in terms of PL intensity and color chromaticity at blue and UV excitations, to demonstrate its viability for commercialized use in light emitting diode (LED) applications.

• 出版日期2013