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APPLIED PHYSICS LETTERS
Volume 92, Issue 5, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.2841067
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The role of the work function and interfacial chemistry on organic device performance was investigated by using a series of contact materials. The active layer was a standard blend of poly(3-hexylthiophene) and [6-6]-phenyl C61-butyric acid methyl ester. Over 100 devices were fabricated and measured to obtain good statistics. Ba/Al and Ca/Al electrodes performed best, with similar open-circuit voltages and power conversion efficiencies. Device stability studies showed devices with these two electrodes remained similar after six weeks with degradation of 11%-16% in net conversion efficiency observed. The incorporation of silver into the electrodes led to considerably more degradation than other electrode types. (c) 2008 American Institute of Physics.
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