Stable organic photovoltaics using Ag thin film anodes

Yambem, S. D., Liao, K. S., Alley, N. J., & Curran, S. A. (2012) Stable organic photovoltaics using Ag thin film anodes. Journal of Materials Chemistry, 22(14), pp. 6894-6898.

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The interaction at the interface between a metal electrode and photoactive polymer is crucial for overall performance and stability of organic photovoltaics (OPVs). In this article, we report a comparative study of the stability of thin film Ag and indium tin oxide (ITO) as electrodes when used in conjunction with an interfacial PEDOT:PSS layer for P3HT:PCBM blend OPV devices. XPS measurements were taken for Ag and ITO/PEDOT:PSS layered samples with different exposure times to ambient conditions (∼25 °C, ∼50% relative humidity) to investigate the migration of Ag and In into the PEDOT:PSS layer. The change in efficiency of OPVs with a longer exposure time and degree of migration is explained by the analysis of XPS results. We propose the mechanism behind the interactions occurring at the interfaces. The efficiency of the ITO electrode OPVs continuously decreased to below 10% of the initial efficiency. However, the Ag devices displayed a slower degradation and maintained 50% of the initial efficiency for the same period of time.

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15 citations in Web of Science®

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ID Code: 86736
Item Type: Journal Article
Refereed: Yes
Keywords: Ambient conditions, Comparative studies, Exposure time, Indium tin oxide, Initial efficiency, ITO electrodes, Layered sample, Metal electrodes, Organic photovoltaics, PEDOT, PSS, Photoactive polymers, Thin film anodes, XPS measurements, Conducting polymers, Efficiency, Electrodes, Indium compounds, Photovoltaic effects, Thin films, Tin, Tin oxides, X ray photoelectron spectroscopy, Silver
DOI: 10.1039/c2jm15670a
ISSN: 09599428 (ISSN)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: © The Royal Society of Chemistry 2012.
Deposited On: 20 Aug 2015 03:46
Last Modified: 21 Aug 2015 04:46

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