Abstract

The carrier collection efficiency (η c ) and energy conversion efficiency (η e ) of polymer photovoltaic cells were improved by blending of the semiconducting polymer with C 60 or its functionalized derivatives. Composite films of poly(2-methoxy-5-(2′-ethyl-hexyloxy)-1,4-phenylene vinylene) (MEH-PPV) and fullerenes exhibit η c of about 29 percent of electrons per photon and η e of about 2.9 percent, efficiencies that are better by more than two orders of magnitude than those that have been achieved with devices made with pure MEH-PPV. The efficient charge separation results from photoinduced electron transfer from the MEH-PPV (as donor) to C 60 (as acceptor); the high collection efficiency results from a bicontinuous network of internal donor-acceptor heterojunctions.

Keywords

AcceptorMaterials scienceHeterojunctionFullerenePolymerPhotovoltaic systemPhenyleneEnergy conversion efficiencyPolymer solar cellCharge carrierOptoelectronicsElectron acceptorPhotochemistryChemistryOrganic chemistryComposite material

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Publication Info

Year
1995
Type
article
Volume
270
Issue
5243
Pages
1789-1791
Citations
10174
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Closed

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Gang Yu, Jun Gao, Jan C. Hummelen et al. (1995). Polymer Photovoltaic Cells: Enhanced Efficiencies via a Network of Internal Donor-Acceptor Heterojunctions. Science , 270 (5243) , 1789-1791. https://doi.org/10.1126/science.270.5243.1789

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DOI
10.1126/science.270.5243.1789