Harvesting triplet excitons for application in polymer solar cells

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Harvesting triplet excitons for application in polymer solar cells

Please use this identifier to cite or link to this item: http://hdl.handle.net/10355/8195

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Title: Harvesting triplet excitons for application in polymer solar cells
Author: Arif, Mohammad, 1974-; Yang, K.; Li, L.; Yu, Ping, Ph. D.; Guha, Suchi; Gangopadhyay, Shubhra; Förster, M.; Scherf, Ullrich
Keywords: excitons
luminescence
polymer blends
Date: 2009-02-13
Publisher: American Institute of Physics
Citation: Appl. Phys. Lett. 94, 063307 (2009)
Abstract: Triplet enhanced ladder-type poly (para-phenylene) polymer (PhLPPP) with covalently bound trace amounts of palladium blended with a fullerene derivative [[6,6]-phenyl C61-butyric acid methyl ester (PCBM)] shows power conversion efficiencies (PCE) almost ten times greater than with pristine ladder-type polymer (with no palladium atom) blended with PCBM. The steady state optical properties of the triplet and nontriplet-enhanced polymers are comparable; the enhanced PCE and external quantum efficiency in PhLPPP photovoltaics are attributed to the presence of long-lived mobile triplet excitons. Furthermore, the luminescence from PhLPPP blends measured in a delayed setup correlates very well with the efficiency of the solar cells.
URI: http://hdl.handle.net/10355/8195
ISSN: 0003-6951

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