Efficient inverted organic light-emitting devices with self or intentionally Ag-doped interlayer modified cathode

Green phosphorescent inverted organic light-emitting devices (IOLEDs) with self or intentionally Ag-doped interlayer modified cathode were demonstrated. The IOLEDs show low driving voltage and high efficiency. For example, the efficiency of inverted bottom-emitting OLED with ITO cathode is comparabl...

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Veröffentlicht in:Applied physics letters 2014-03, Vol.104 (9)
Hauptverfasser: Liu, Wenbo, Liu, Shihao, Yu, Jing, Zhang, Wei, Wen, Xuemei, Yin, Yongming, Zhang, Letian, Chen, Ping, Xie, Wenfa
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Sprache:eng
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Zusammenfassung:Green phosphorescent inverted organic light-emitting devices (IOLEDs) with self or intentionally Ag-doped interlayer modified cathode were demonstrated. The IOLEDs show low driving voltage and high efficiency. For example, the efficiency of inverted bottom-emitting OLED with ITO cathode is comparable with the conventional bottom-emitting OLED with ITO anode. The top-emitting IOLED with Ag cathode shows high current efficiency of 76.4 cd/A which is 2.38 times of that of the conventional bottom-emitting OLED with ITO anode. The results indicate that the electron injection from cathode was observably improved by the Ag-doped interlayer and such interlayer is cathode independent relatively.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4868031