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CAS Number 609771-63-3

Fullerene Acceptors, Materials

Product Code M114-100mg
Price £370 ex. VAT

PC70BM, fullerene electron acceptor used in efficient OPV devices

High purity and available online for fast, secure dispatch

Specifications | Pricing and Options | MSDS | Literature and Reviews

PC70BM (CAS number 609771-63-3) 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.

Soluble fullerene acceptor

Soluble fullerene acceptor

Enables efficient charge transfer and exicition dissociation

Improves absorption characteristics

Improves absorption characteristics

for the visible range of the solar spectrum with non-symmetrical C70 cage

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High purity

High purity

>99% High purity

PC70BM from Ossila was used in the high-impact paper (IF 29.37)

PC70BM from Ossila was used in the high-impact paper (IF 29.37), ll-Inkjet-Printed, All-Air-Processed Solar Cells, S. Jung et al., Adv. Energy Mater., 1400432 (2014); DOI: 10.1002/aenm.201400432.

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 CH3NH3PbI3-xClx perovskite solar cells (more details can be found in fabrication guide). When fabricating devices, processing and handling materials in a glove box helps maintain their purity and maintain efficiency by avoiding contamination from particulates, moisture, and airborne impurities.

General Information

CAS Number 609771-63-3
Chemical Formula C82H14O2
Full Name [6,6]-Phenyl-C71-butyric acid methyl ester
Molecular Weight 1031 g/mol
HOMO / LUMO HOMO = -5.9 eV, LUMO = -3.9 eV
Synonyms C70 PCBM, PC71BM, [70]PCBM
Classification / Family Fullerenes, Organic semiconducting materials, Organic Photovoltaics, Polymer Solar Cells, Perovskite Solar cells, Electron transport layer materials

Chemical Structure

PC70BM (C70-PCBM), PC71BM chemical structure, CAS 609771-63-3
PC70BM (C70-PCBM), PC71BM chemical structure, CAS 609771-63-3


The percentages in the table below represent the ratio of PC70BM to PC60BM in the product (i.e. 95% PC70BM with 5% PC60BM).

Code Purity Quantity Price
M114 >99% 100 mg £370
M114 >99% 250 mg £720
M114 >99% 500 mg £1250
M114 >99% 1 g £2200

MSDS Documentation


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.
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