产品名称：ossila材料PC70BM

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.

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.

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