Proceedings of International Conference Asia-Pacific Hybrid and Organic Photovoltaics 2018 (AP-HOPV18)
Publication date: 27th October 2017
Alternating fullerene-diketopyrrolopyrrole copolymers as main-chain oligomers were studied by means of femtosecond transient absorption spectroscopy (TAS) to probe the electron transfer dynamics and to optimize their application as photo-active materials in organic photovoltaics. Our unique approach is based on dodecyl diketopyrrolopyrrole (DPP), which was combined in a repeating structure with the strong electron-accepting phenyl-C61-butyric acid methyl ester (PC61BM) to yield the DPP-PC61BM copolymer.[1] Femtosecond TAS was performed with films of DPP-PC61BM and a binary blend of DPP and PC61BM as reference deposited onto glass. The thrust was to corroborate electron transfer from the electron donating DPP to the electron accepting PC61BM and to determine the kinetics of charge separation and charge recombination using Target Analysis. In contrast to the binary blend, which reveals upon photoexcitation indirect charge separation across the interface prior to the formation of free charge carriers, evidence for a direct charge transfer is gathered for the DPP-PC61BM copolymer. The later relates to the localization of the HOMO on the donor moiety and the LUMO directly situated on the acceptor moiety, as indicated by functional theory studies.[1] As far as the lifetime of the product of charge separation, that is, the charge separated state, is concerned, it is longer in the DPP-PC61BM copolymer than in the DPP:PC61BM blend. In short, our study provides an in-depth electron transfer investigation of a promising covalently linked electron acceptor-donor copolymer / macromolecule for organic photovoltaic.
References
[1] Stephen, M.; Dowland, S.; Gregori, A.; Ramanitra, H. H.; Silva, H.S.; Combe, C. M. S.; Bégué, D.; Dagron-Lartigau, C.; Morse, G. E.; Genevičius, K.; Arlauskas, K.; Juška, G.; Distler, A.; Hiorns, R. C. Polym Int. 2017 66, 388-398.
nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.
Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.
International Conference on Hybrid and Organic Photovoltaics
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.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.