CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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Air Stability of Cs2CO3:Ag/Ag Cathode for Organic Light-Emitting Diodes |
LIU Qian, DUAN Lian, ZHANG De-Qiang, QIAO Juan, WANG Li-Duo, QIU Yong |
Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 100084 |
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Cite this article: |
LIU Qian, DUAN Lian, ZHANG De-Qiang et al 2009 Chin. Phys. Lett. 26 106801 |
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Abstract We report the superior stability of the composite Cs2CO3:Ag/Ag cathode structure, which can be used in efficient organic light-emitting diodes (OLEDs). Devices with the Cs2CO3:Ag (1:10, 5nm)/Ag (95nm) cathode show a considerably improved lifetime compared with the control device with the Cs2CO3 (0.5nm)/Ag (100nm) cathode. The composite Cs2CO3:Ag/Ag film is proved to be stable in the atmosphere. X-ray diffraction (XRD) is applied to analyze the crystalline structure of the Cs2CO3:Ag film, and it is demonstrated that CsAg alloy is formed, leading to the improved stability of the thin film and the devices.
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Keywords:
68.35.Bd
68.37.-d
61.05.Cp
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Received: 03 June 2009
Published: 27 September 2009
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PACS: |
68.35.bd
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(Metals and alloys)
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68.37.-d
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(Microscopy of surfaces, interfaces, and thin films)
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61.05.cp
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(X-ray diffraction)
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