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General Information

Applications

PC₇₀BM is a fullerene electron acceptor commonly used in the most efficient organic photovoltaic devices. The non-symmetrical C₇₀ cage of PC₇₀BM enables energetic transitions that are forbidden in C₆₀, improving the absorption characteristics over PC₆₀BM for the visible range of the solar spectrum [1]. This allows increased photon harvesting, and a potentially higher photocurrent for devices using PC₇₀BM rather than PC₆₀BM. The 95% purity PC₇₀BM is recommended for general applications, and has produced power conversion efficiencies of over 9% in our own laboratories when mixed with a low bandgap polymeric donor, while the 99% PC₇₀BM is recommended where ultimate performance is required.

The energy levels and good electron mobility of PC₇₀BM enable it to be used as an electron transport layer in perovskite solar cells. In our laboratories, we have achieved a PCE approaching 12% using PC₇₀BM in CH₃NH₃PbI_3-xCl_x perovskite solar cells (more details can be found in fabrication guide).

Literature and Reviews

1. Influence of PC₆₀BM or PC₇₀BM as electron acceptor on the performance of polymer solar cells, F. Zhang et al., Sol. Energy Mater. Sol. Cells, 97 (2012), 71–77; DOI: 10.1016/j.solmat.2011.09.006.
2. Efficient planar heterojunction mixed-halide perovskite solar cells deposited via spray-deposition, A. T. Barrows et al., Energy Environ. Sci., 7 (2014), 2944–2950; DOI: 10.1039/C4EE01546K.

To the best of our knowledge the technical information provided here is accurate. However, Ossila assume no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.