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APPLIED PHYSICS LETTERS
Volume 91, Issue 2, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.2757125
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A solution processible titanium chelate, titanium (diisopropoxide) bis (2,4-pentanedionate) (TIPD), was used as the cathode buffer layer in the polymer solar cells (PSCs) based on the blend of poly[2-methoxy-5-(2(')-ethylhexyloxy)-1,4-phenylenevinylene] and [6,6]-phenyl-C-61-butyric acid methyl ester. Introducing TIPD buffer layer reduced the interface resistance between the active layer and Al electrode, leading to a lower device resistance. The power conversion efficiency of the PSC with TIPD buffer layer reached 2.52% under the illumination of AM1.5, 100 mW/cm(2), which is increased by 51.8% in comparison with that (1.66%) of the device without TIPD buffer layer under the same experimental conditions. (C) 2007 American Institute of Physics.
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