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http://hdl.handle.net/10119/10300
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| Title: | Improved initial drop in operational lifetime of blue phosphorescent organic light emitting device fabricated under ultra high vacuum condition |
| Authors: | Yamamoto, H.
Brooks, J.
Weaver, M. S.
Brown, J. J.
Murakami, T.
Murata, H. |
| Keywords: | OLED
stability
ultra high vacuum
water
blue phosphorescence |
| Issue Date: | 2011-07-18 |
| Publisher: | American Institute of Physics |
| Magazine name: | Applied Physics Letters |
| Volume: | 99 |
| Number: | 3 |
| Start page: | 033301-1 |
| End page: | 033301-3 |
| DOI: | 10.1063/1.3610998 |
| Abstract: | A blue phosphorescent organic light emitting device fabricated under the ultra high vacuum (UHV) condition of 6.5 × 10^<−7> Pa decreases the initial luminance drop upon lifetesting under a constant dc current of 15 mA/cm^2 by 3 times compared to a device fabricated under a high vacuum (HV) condition of 7.6 × 10^<−6> Pa resulting in a 23% increase in half lifetime. We calculate a water content of 10^<−4> mol. % in the UHV device emissive layer (EML) and 10^<−2> mol. % in the HV device EML. We discuss the effects of water on luminance loss and voltage rise for the devices. |
| Rights: | Copyright 2011 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in H. Yamamoto, J. Brooks, M. S. Weaver and J. J. Brown, T. Murakami and H. Murata, Applied Physics Letters, 99(3), 033301 (2011) and may be found at http://link.aip.org/link/doi/10.1063/1.3610998 |
| URI: | http://hdl.handle.net/10119/10300 |
| Material Type: | publisher |
| Appears in Collections: | c10-1. 雑誌掲載論文 (Journal Articles)
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