| Presentation | 2012-01-27 Measurement of two-wavelength excited photo luminescence in Ba_3Si_6O_<12>N_2:Eu^<2+> phosphor Ryo ISHIOKA, Kouhei IGARASHI, Takeshi FUKUDA, Yasuo SHIMOMURA, Norihiko KAMATA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | One candidate of efficient and reliable phosphor materials, Ba3Si6O12N2:Eu2, is suitable for the combination with UV- to Ba_3Si_6O_<12>N_2:Eu^<2+>, is suitable for the combination with UV- to blue-LED, since it has efficient emission around 525 nm with a wide excitation band between 250 nm and 450 nm. Most phosphor materials, however, exhibit various trap levels in theromoluminescence spectra, and the relation between these trap levels and non-radiative recombination (NRR) centers is not clearly understood. Here we measured the Ba_3Si_6O_<12>N_2:Eu^<2+>, phosphor by two-wavelength excited photoluminescence method which is effective for detecting NRR centers through non-contacting and nondestructive way. The method adds the second excitation light whose photon energy is lower than the bandgap, and observes the intensity change of photoluminescence. We observed an intensity increase with the addition of the BGE light, and obtained the first-step information on the presence of NRR centers by studying the BGE density and BGE energy dependence. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Phosphor for LED lamp / Non-radiative recombination center / Two-wavelength excited photoluminescence / Thermoluminescence |
| Paper # | EID2011-19 |
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| Committee | EID |
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| Conference Date | 2012/1/2(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Electronic Information Displays (EID) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Measurement of two-wavelength excited photo luminescence in Ba_3Si_6O_<12>N_2:Eu^<2+> phosphor |
| Sub Title (in English) | |
| Keyword(1) | Phosphor for LED lamp |
| Keyword(2) | Non-radiative recombination center |
| Keyword(3) | Two-wavelength excited photoluminescence |
| Keyword(4) | Thermoluminescence |
| 1st Author's Name | Ryo ISHIOKA |
| 1st Author's Affiliation | Graduate School of Science and Engineering, Saitama University() |
| 2nd Author's Name | Kouhei IGARASHI |
| 2nd Author's Affiliation | Graduate School of Science and Engineering, Saitama University |
| 3rd Author's Name | Takeshi FUKUDA |
| 3rd Author's Affiliation | Graduate School of Science and Engineering, Saitama University |
| 4th Author's Name | Yasuo SHIMOMURA |
| 4th Author's Affiliation | Mitsubishi Chemical Group, Science and Technical Research Center Inc. |
| 5th Author's Name | Norihiko KAMATA |
| 5th Author's Affiliation | Graduate School of Science and Engineering, Saitama University |
| Date | 2012-01-27 |
| Paper # | EID2011-19 |
| Volume (vol) | vol.111 |
| Number (no) | 421 |
| Page | pp.pp.- |
| #Pages | 4 |
| Date of Issue | |