| Presentation | 2011-03-08 Photodegradation dynamics ofpolyfluorene thin films studied by means of photoluminescence spectroscopy : Influence of residual oxygen Masanori NAKAGAWA, Takashi KOBAYASHI, Takashi NAGASE, Hiroyoshi NAITO, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Polyfluorene (PFO) has been extensively studied as an efficient blue emitter for organic light-emitting diodes (OLED). However, degradation of PFO occurs under device operation and then results in emission color change due to appearance of a new green-emission band. The origin of the green-emission band has not been revealed yet due to the complex device structure of OLED. In this study, we find out that UV irradiation to sealed PFO results in the appearance of the green-emission band without the OLED device structure. This new method allows us to investigate the characteristics of the green-emission band taking out the influence of the other degradation phenomena. By means of this method, we conclude that the origin of the green-emission band is different from that of the decrease in EL efficiency or decrease in solubility of the polymer caused by device operation. We also find that the green-emission band only causes under the completely oxygen-free condition. Finally, we conclude that conjugated electron accepter unit, such as benzothiadiazole units, could suppress the color instability. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | fluorene / color instability / photoluminescence / green-emission band / degradation |
| Paper # | OME2010-80 |
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| Committee | OME |
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| Conference Date | 2011/3/1(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Organic Material Electronics (OME) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Photodegradation dynamics ofpolyfluorene thin films studied by means of photoluminescence spectroscopy : Influence of residual oxygen |
| Sub Title (in English) | |
| Keyword(1) | fluorene |
| Keyword(2) | color instability |
| Keyword(3) | photoluminescence |
| Keyword(4) | green-emission band |
| Keyword(5) | degradation |
| 1st Author's Name | Masanori NAKAGAWA |
| 1st Author's Affiliation | Graduate School of Engineering, Osaka Prefecture University() |
| 2nd Author's Name | Takashi KOBAYASHI |
| 2nd Author's Affiliation | Graduate School of Engineering, Osaka Prefecture University:The Research Institute for Molecular Electronic Devices, Osaka Prefecture University |
| 3rd Author's Name | Takashi NAGASE |
| 3rd Author's Affiliation | Graduate School of Engineering, Osaka Prefecture University:The Research Institute for Molecular Electronic Devices, Osaka Prefecture University |
| 4th Author's Name | Hiroyoshi NAITO |
| 4th Author's Affiliation | Graduate School of Engineering, Osaka Prefecture University:The Research Institute for Molecular Electronic Devices, Osaka Prefecture University |
| Date | 2011-03-08 |
| Paper # | OME2010-80 |
| Volume (vol) | vol.110 |
| Number (no) | 463 |
| Page | pp.pp.- |
| #Pages | 4 |
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