Proceedings of 6th International Conference on Hybrid and Organic Photovoltaics (HOPV14)
Publication date: 1st March 2014
Organic photovoltaic (OPVs) cells are viewed as one of the most promising candidates for low cost solar cells because of the possibility of a simple and cheap production on flexible and large area substrates.1 The power conversion efficiency (PCE) of polymer solar cells has improved rapidly from below 1% to over 9% in the past 16 years.2 The main contribution to this progress was made by the molecular engineering of new conjugated polymers and small molecules (as the donor materials), assisted by limited successes in derivatizing the fullerenes (PC60BM or PC70BM as the electron acceptor). The most critical challenges in developing ideal donor materials are to design and synthesize conjugated polymers with (1) appropriate solubility and miscibility to achieve an optimal blend with PCBM in the active layer, (2) strong absorption ability and narrow optical band gap to harvest more solar photon for a thin active layer, (3) well matched HOMO – LUMO energy levels between polymer and PCBM to ensure a good charge separation and high open circuit voltage (Voc) and (4) high hole mobility.3 Amongst all the strategies used to tentatively reach these desired properties, the combination of the electron-rich (donor) and electron-deficient (acceptor) groups as repeating units, forming internal donor-acceptor (D-A) structures, have been widely used for developing low band gap semi-conducting materials.4 it is still a challenge to develop an ideal low-band-gap copolymer by a judicious choice of the donor-acceptor combination. Different D-A small molecules and copolymers with fluorinated isoindigo as the strong acceptor and oligothiophene as the donor have been designed and synthesized for solution-processed bulk-heterojunction solar cells. Interesting PCEs were achieved by improving the short-circuit current density without sacrificing the high open-circuit voltage and fill factor through the strategy of fluorinated isoindigo incorporating in D-A small molecules and polymers for OPVs.
[1] Yu, G.; Gao, J.; Hummelen, J. C.; Wudl, F.; Heeger, A. J. Science. 1995,270, 1789-1791. [2] (a) Zhou et al. Angew. Chem., Int. Ed. 2011, 50, 2995. (b) Son et al. J. Am. Chem. Soc. 2011, 133, 1885.(c) Chen et al. Nature Photonics, 2009, 3, 649.6. [3] Sun, Y.; Welch, G. C.; Leong, W. L.; Takacs, C. J.; Bazan, G. C.; Heeger, A. J. Nat. Mater. 2012, 11, 44. [4] Heeger, A. J. Chem. Soc. Rev. 2010, 39, 2354−2371.
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.