PC70BM (C70-PCBM), PC71BM

CAS Number 609771-63-3

Fullerenes for Photovoltaics and Biotechnology, Materials

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

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 ([6,6]-Phenyl-C71-butyric acid methyl ester, 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 PCBM 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

Enables efficient charge transfer and exicition dissociation

Improves absorption characteristics

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

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High purity

>99% High purity

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 CH₃NH₃PbI_3-xCl_x 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

Pricing

The percentages in the table below represent the ratio of PC₇₀BM to PCBM 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

PC70BM MSDS Sheet

Literature and Reviews

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.
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.

Learn More

Polymer-Fullerene Bulk Heterojunction Solar Cells

Polymer-fullerene bulk heterojunction (BHJ) solar cells are based on blends of semiconducting polymers and fullerene derivatives, such as PCBM. It is described as a bulk heterojunction as it involves a blend of two materials with differing energy band gaps, forming a dispersed, interpenetrating network.