Статья

Polymer Photovoltaic Cells: Enhanced Efficiencies via a Network of Internal Donor-Acceptor Heterojunctions

Gang YuInstitute for Polymers and Organic Solids, University of California at Santa Barbara, Santa Barbara, CA 93106-5090, USAJun GaoInstitute for Polymers and Organic Solids, University of California at Santa Barbara, Santa Barbara, CA 93106-5090, USAJan C. HummelenInstitute for Polymers and Organic Solids, University of California at Santa Barbara, Santa Barbara, CA 93106-5090, USAFred WudlInstitute for Polymers and Organic Solids, University of California at Santa Barbara, Santa Barbara, CA 93106-5090, USAAlan J. HeegerInstitute for Polymers and Organic Solids, University of California at Santa Barbara, Santa Barbara, CA 93106-5090, USA

1995en

ABI

Аннотация

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.

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Идентификаторы

DOI: 10.1126/science.270.5243.1789

Цитирования и источники

Цитирований: 8Использованных источников: 0

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