Enhanced Optical Properties of Bredigite‐Structure Ca13.7Eu0.3Mg2[SiO4]8 Phosphor: Effective Eu Reduction by La Co‐Doping
- Authors
- Kim, Seung Jun; Jang, Ho Seong; Unithrattil, Sanjith; Kim, Yoon Hwa; Im, Won Bin
- Issue Date
- Feb-2016
- Publisher
- WILEY-BLACKWELL
- Citation
- JOURNAL OF THE AMERICAN CERAMIC SOCIETY, v.99, no.2, pp.557 - 563
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF THE AMERICAN CERAMIC SOCIETY
- Volume
- 99
- Number
- 2
- Start Page
- 557
- End Page
- 563
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/23948
- DOI
- 10.1111/jace.14021
- ISSN
- 0002-7820
- Abstract
- A green phosphor, La0.4Ca13.3Eu0.3Mg2Si8O31.6+N0.4- (LaCMSN:Eu2+), was prepared by a solid-state reaction and an efficient green emission was observed at 506 nm under near-ultraviolet (NUV) excitation. The structural and optical properties of LaCMSN:Eu2+ phosphors as well as their thermal quenching were investigated. The partial substitution of La3+ and N3- in Ca13.7Eu0.3Mg2Si8O32 led to a considerable enhancement in the peak emission intensity by as much as 194%. This demonstrates not only that the total number of Eu2+ activators increased, but also that the probability of a nonradiative transition between Eu2+ and Eu3+ could be reduced as the increase in concentration of the former is at the expense of the later. The white light-emitting diode (LED) was fabricated using phosphor with a NUV LED chip. The LED showed warm white light with an excellent color rendering index of 91. The LaCMSN:Eu2+ is thus a potential green-emitting phosphor for white LEDs.
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