Electron and hole transport in poly(para-phenylene vinylene):methanofullerene bulk heterojunction solar cells

Valentin D. Mihailetchi; Bert de Boer; Christian Melzer; L. Jan Anton Koster; Paul W.M. Blom

doi:10.1117/12.563821

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3 November 2004 Electron and hole transport in poly(para-phenylene vinylene):methanofullerene bulk heterojunction solar cells

Valentin D. Mihailetchi, Bert de Boer, Christian Melzer, L. Jan Anton Koster, Paul W.M. Blom

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Proceedings Volume 5520, Organic Photovoltaics V; (2004) https://doi.org/10.1117/12.563821
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

We have measured the electron and hole mobility in blends of poly(2-methoxy-5-(3',7'-dimethyloctyloxy)-p-phenylene vinylene) (MDMO-PPV) and [6,6]-phenyl C₆₁-butyric acid methyl ester (PCBM) with varying MDMO-PPV/PCBM composition. It is shown that the electron mobility in the PCBM-rich phase gradually increases up to 80 wt.% PCBM, due to an increased number of percolated pathways from bottom to top electrode. In contrast to the expectations the hole mobility in the MDMO-PPV phase shows a similar behavior as a function of fullerene concentration; Starting at 40 wt.% with the value of pristine MDMO-PPV the hole mobility strongly increases and saturates beyond 67 wt.% at a value which is more than two order of magnitude higher. The large enhancement of the hole mobility and its saturation is related to recent findings on the film morphology of this material system.

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Valentin D. Mihailetchi, Bert de Boer, Christian Melzer, L. Jan Anton Koster, and Paul W.M. Blom "Electron and hole transport in poly(para-phenylene vinylene):methanofullerene bulk heterojunction solar cells", Proc. SPIE 5520, Organic Photovoltaics V, (3 November 2004); https://doi.org/10.1117/12.563821

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