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| Type |
Poster Presentation |
| Area |
Inorganic Chemistry |
| Room No. |
Grand Ballroom |
| Time |
10월 19일 (금요일) 11:00~12:30 |
| Code |
INOR.P-57 |
| Subject |
Synthesis and characterization of red emitting K3SiF7:Mn4+ phosphor for white light LED application |
| Authors |
Kangsik Choi, Younbong Park*
Department of Chemistry, Chungnam National University, Korea
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| Abstract |
Red phosphors with narrow red emission are especially interesting because they offer a wide range of color gamut and provide better rendering in LED applications such as displays and solid-state lighting. Until now, Eu2+-activated silicate and nitride phosphors have been mainly studied. However, due to the emission characteristic of Eu2+ with a wide half-width, there is a great limitation in practical use. Since the development of the Mn4+ activated K2SiF6 phosphor with a narrow half-width, Mn4+ ion has been actively studied as active agents and is currently the only attraction in the LED market. We synthesized K3SiF7:Mn4+ phosphor by reacting K2SiF6:Mn4+ with KHF2 under reducing atmosphere. The K3SiF7:Mn4+ is crystallized with P4/mbm symmetry. The luminescent properties of K3SiF7:Mn4+ are almost identical to those of the K2SiF6:Mn4+ phosphor, but its materials identity is distinct due to a completely different crystallographic structure. The K3SiF7:Mn4+ phosphor was investigated by X-ray diffraction spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, furrier transform infrared and time-resolved photoluminescence and compared with K2SiF6:Mn4+ phosphor. The K3SiF7:Mn4+ phosphor can be useful in warm white LEDs and offer the possibility to develop non-rare-earth phosphors. |
| E-mail |
allyplayer@naver.com |
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122nd General Meeting of the KCS