期刊
IEEE TRANSACTIONS ON NANOTECHNOLOGY
卷 17, 期 5, 页码 1077-1081出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TNANO.2018.2860055
关键词
Transparent electrodes; ultrathin metal film; hybrid nucleation layer; organic light-emitting devices
类别
资金
- National Key Research and Development Program of China [2017YFB0404501]
- National Nature Science Foundation of China [61675085, 61705075, 61505065, 61605056]
- China Postdoctoral Science Foundation [2016M600230]
We report an ultrathin Au transparent electrode with the thickness of only 4.4 nm based on an S-1805/Ag hybrid nucleation layer and its application in flexible organic light-emitting devices (OLEDs) as the replacement of indium tin oxide (ITO) anode. The Volmer-Weber growth mode of the deposited Au film has been suppressed successfully by using the hybrid nucleation layer, in which the S-1805 acts as a substrate modification layer and 0.6 nm Ag acts as a seeding layer. The resulting ultrathin Au film with the thickness of 4.4 nm shows high transparency, high conductivity, and ultrasmooth surface. A 25% improvement in efficiency has been demonstrated for the OLEDs with ultrathin Au anodes compared to the ITO-based devices. The application of the high-performance ultrathin Au electrodes in OLEDs results in high flexibility and mechanical robustness with small performance variations after 2100 bending cycles with a 7.5 mm bending radius.
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