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Device Operation of Conjugated Polymer/Zinc Oxide Bulk Heterojunction Solar Cells


  • The authors are indebted to J. Sweelssen (TNO Science and Industry) for a generous supply of MDMO-PPV. Furthermore, Dr. M. M. Wienk and Prof. Dr. R. A. J. Janssen are acknowledged for useful discussions. One of the authors (L.J.A.K.) wishes to thank J. Wildeman for technical assistance. The work of this author forms part of the research program of the Dutch Polymer Institute (No. 323).


Solar cells based on a poly(p-phenylene vinylene) (PPV) derivative and zinc oxide nanoparticles can reach a power conversion efficiency of 1.6 %. The transport of electrons and holes in these promising devices is characterized and it is found that the electron mobility is equal to 2.8 × 10–9 m2 V–1 s–1, whereas the hole mobility amounts to 5.5 × 10–10 m2 V–1 s–1. By modeling the current–voltage characteristics under illumination it is found that the performance of PPV/zinc oxide solar cells is limited by the charge-carrier mobilities. Subsequently, how to further improve the efficiency is discussed.

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