| Presentation | 2007/1/18 Excitation process in blue-electroluminescent BaAl_2S_4:Eu thin films Katsu TANAKA, Shinji OKAMOTO, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We have investigated excitation process in oxygen-free BaAl_2S_4:Eu electroluminescent (EL) thin-films having high crystallinity. EL wave form clarifies firstly that blue EL in BaAl_2S_4:Eu thin-film is caused by hot hole excitation. On the contrary, hot electron excitation process has been well known in thin-film EL (TFEL) devices such as ZnS:Mn. X-ray photoelectron spectroscopy spectra and first principles calculation revealed that the valence band of BaAl_2S_4 host consists of S3p, S3s, Al3s and Al3p orbital. The electronic structure indicates that Eu^<2+> ions activated in BaAl_2S_4 are well localized, and supports the unique excitation process in which hot holes excite the Eu^<2+> centers effectively in BaAl_2S_4 host. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | BaAl_2S_4:Eu / MBE / excitation process / hot hole / XPS |
| Paper # | EID2006-47 |
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| Conference Information | |
| Committee | EID |
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| Conference Date | 2007/1/18(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Electronic Information Displays (EID) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Excitation process in blue-electroluminescent BaAl_2S_4:Eu thin films |
| Sub Title (in English) | |
| Keyword(1) | BaAl_2S_4:Eu |
| Keyword(2) | MBE |
| Keyword(3) | excitation process |
| Keyword(4) | hot hole |
| Keyword(5) | XPS |
| 1st Author's Name | Katsu TANAKA |
| 1st Author's Affiliation | NHK Science and Technical Research Laboratories() |
| 2nd Author's Name | Shinji OKAMOTO |
| 2nd Author's Affiliation | NHK Science and Technical Research Laboratories |
| Date | 2007/1/18 |
| Paper # | EID2006-47 |
| Volume (vol) | vol.106 |
| Number (no) | 499 |
| Page | pp.pp.- |
| #Pages | 3 |
| Date of Issue | |