Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV16)
Publication date: 28th March 2016
A new double-cable non-fullerene polymer (PTF-PDI) with acceptor bay-substituted perylene diimide (PDI) unit as the side chain attaching to the donor poly (fluorenylthiophene) (PFT) unit via the alkoxy groups was successfully synthesized by Suzuki Coupling. The structure and photophysical properties of PTF-PDI have been characterized by NMR, GPC, UV-Vis, fluorescence spectroscopies, DSC-TGA and CV. The P3HT:PCBM blend films with different doping ratio of PFT-PDI were prepared in order to study the effect on the device performance of P3HT:PCBM bulk heterojunction polymer solar cells (BHJ-PSCs). Under AM 1.5 G illumination, BHJ-PSCs having the structure ITO/MoO3/P3HT:PCBM:PTF-PDI/LiF/Al showed a substantial improvement. When 3 wt% of PTF-PDI was doped in the P3HT:PCBM blend system, the maximum PCE was 4.5%, increased by times of 27.4% relative to that of the reference solar cell without the PTF-PDI due to the increase of short-circuit current (Jsc). UV–vis absorption, photoluminescence, X-ray measurements and AFM studies showed that the PTF-PDI increased effective absorption, photoluminescence quenching, enhanced crystallinity of P3HT andmorphology control in the P3HT:PCBM:PTF-PDI blend films. The PTF-PDI acts as a “compatibilizer” which has the amphiphilicity toward P3HT and PCBM. The PTF-PDI doping improves the bicontinuous interpenetrating networks of the P3HT and PCBM components, and controls the interface morphology of the P3HT:PCBM donor–acceptor phase domains within the composite, and achieves the efficiency of 4.5% which is the highest for the PSCs based on the double-cable polymers.
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International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
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