1992 Fiscal Year Final Research Report Summary
Elevation of Conversion Efficiency and Search of Laser Action in Organic Electroluminescent Devices
| Project/Area Number |
03452082
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Applied materials
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| Research Institution | KYUSHU UNIVERSITY |
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Principal Investigator |
SAITO Shogo Kyushu University, Graduate School of Engineering Sciences, Professor, 総合理工学研究科, 教授 (80136548)
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| Co-Investigator(Kenkyū-buntansha) |
TSUTSUI Tetsuo Kyushu University, Graduate School of Engineering Sciences, Associate Professor, 総合理工学研究科, 助教授 (40037982)
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| Project Period (FY) |
1991 – 1992
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| Keywords | Luminescent dye / Organic thin film / Electroluminescence / Hetero junction / Singlet exciton / Radiative decay / Emission pattern / Optical micro-cavity |
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| Research Abstract |
Requirements for the confinements of injected carriers and generated excitons within thin emission layer were clarified by using three layer organic EL devices. Then emphasis was laid on the micro-cavity effects in the three layer devices, that is, double-heterojunctions-type EL devices. We observed two effects in three layer devices; an interference effect of the emitted light and an effect of confined radiation field on the spontaneous emission from the thin emission layer. The experimental results could be interpreted theoretically by using a simple interference model and a quantum electrodynamic model. We could demonstrate to control the outer emission pattern and radiative decay rate.
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