2003 Fiscal Year Final Research Report Summary
Development of Organic LASER Materials based on Alq3
| Project/Area Number |
12440194
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
機能・物性・材料
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| Research Institution | Japan Advanced Institute of Science and Technology |
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Principal Investigator |
MITANI Tadaoki Japan Advanced Institute of Science and Technology, School of Materials Science, Professor, 材料科学研究科, 教授 (50010939)
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| Co-Investigator(Kenkyū-buntansha) |
KATO Masako Nara Woman's University, Faculty of Science, Associate Professor, 理学部, 助教授 (80214401)
AHN Jeung sun Japan Advanced Institute of Science and Techhology, School of Materials Science, Research Associate, 材料科学研究科, 助手 (10249956)
OKUBO Takashi Japan Advanced Institute of Science and Technology, School of Materials Science, Research Associate, 材料科学研究科, 助手 (90322677)
SHIMODA Tatsuya Japan Advanced Institute of Science and Technology, School of Materials Science, Visiting Professor, 材料科学研究科, 客員教授
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| Project Period (FY) |
2000 – 2003
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| Keywords | EL device / electroluminescence / Organic LASER / Alq3 / metal complexes |
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| Research Abstract |
As a new emitting material for the organic EL devices, aluminum (III) tris[2-(2-hydroxy phenyl)thiazolate](Alptz_3)with a similar molecular structure to AIq_3 has been synthesized.The optical properties of Alptz_3 are rather unique as compared with Alq_3.In an ethanol solution, the optical absorption spectra have long tails over the range of 350-400nm which is normally only allowed in solid forms.There exist two polymorplis in solid form having different sublimation temperatures.The low-temperature polymorph shows a large energy shift in the emission band in spite of having the same absorption spectra as the high-temperature polymorph.The organic EL devices based on these two polymorphs show blue and green emissions, respectively.The energy shift from blue to green emission band is attributable to structure-dependent relaxation of the molecules through the intermolecular interaction, suggesting a possibility to control the emission band using the flexibility of the molecular structure.
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