New Green Phosphor Ba3Si6O12N2:Eu for White LED: Crystal Structure and Optical Properties |
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| Journal | Key Engineering Materials (Volume 403) |
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| Volume | SiAlONs and Non-oxides |
| Edited by | Katsutoshi Komeya, Yi-Bing Cheng, Junichi Tatami and Mamoru Mitomo |
| Pages | 11-14 |
| DOI | 10.4028/www.scientific.net/KEM.403.11 |
| Citation | Masayoshi Mikami et al., 2008, Key Engineering Materials, 403, 11 |
| Online since | December, 2008 |
| Authors | Masayoshi Mikami, Satoshi Shimooka, Kyota Uheda, Hiroyuki Imura, Naoto Kijima |
| Keywords | Ba3Si6O12N2, Ba3Si6O9N4, Density Functional Theory (DFT), Phosphor, White LEDs |
| Abstract | A new oxynitride, Ba3Si6O12N2, has been synthesized. The crystal structure has been successfully determined by close collaboration between experiment and first-principles calculation. This compound doped with Eu exhibits intense green photoluminescence with high color purity under near-ultraviolet to blue light excitation; in particular, it has much less thermal quenching than (Ba,Sr,Eu)2SiO4. Thus (Ba,Eu)3Si6O12N2 appears promising green phosphor for white LED backlight for display. The atomic/electronic structure is discussed in comparison with Ba3Si6O9N4, which could not become efficient phosphor by doping Eu due to strong thermal quenching at room temperature. |
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