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- W2567396940 abstract "We evaluated the influence of impurities in the vacuum chamber used for the fabrication of organic light-emitting diodes on the lifetime of the fabricated devices and found a correlation between lifetime and the device fabrication time. The contact angle of the ITO substrates stored the chamber under vacuum were used to evaluate chamber cleanliness. Liquid chromatography-mass spectrometry was performed on Si wafers stored in the vacuum chamber before device fabrication to examine the impurities in the chamber. Surprisingly, despite the chamber and evaporation sources being at room temperature, a variety of materials were detected, including previously deposited materials and plasticizers from the vacuum chamber components. We show that the impurities, and not differences in water content, in the chamber were the source of lifetime variations even when the duration of exposure to impurities only varied before and after deposition of the emitter layer. These results suggest that the impurities floating in the vacuum chamber significantly impact lifetime values and reproducibility." @default.
- W2567396940 created "2017-01-06" @default.
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- W2567396940 date "2016-12-01" @default.
- W2567396940 modified "2023-10-15" @default.
- W2567396940 title "Influence of vacuum chamber impurities on the lifetime of organic light-emitting diodes" @default.
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- W2567396940 doi "https://doi.org/10.1038/srep38482" @default.
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