Proceedings of International Conference Asia-Pacific Hybrid and Organic Photovoltaics (AP-HOPV17)
Publication date: 7th November 2016
Singlet fission (SF) is a mechanism where two triplet excitons are formed after photoexcitation of a singlet exciton through a spin-allowed process.1 This process has received great attention recently as it has the potential to circumvent the Shockley-Queisser efficiency limit exhibited by single layer solar cells.2 In this contribution, we report the results obtained in the investigation of the mechanism of intramolecular SF in pentacene oligomers employing multireference perturbation theory and quantum dynamics methods.3,4 Specifically, we have investigated a series of 6,13-bis(triisopropylsilylethynyl)pentacene dimers covalently bonded to a phenylene spacer in ortho, meta, and para conformations. The results point out the fundamental role of charge transfer states in the mechanism of SF. In particular, it is shown that mixing between the absorbing excited state and higher-lying charge transfer states via a superexchange-like mechanism facilitates SF. The role that the electronic structure of the linker has in the control of intramolecular SF is also discussed.
References
1. M. B. Smith, J. Michl, Chem. Rev. 2010, 110, 6891.
2. W. Shockley, H. J. Queisser, J. Appl. Phys. 1961, 32, 510.
3. J. Zirzlmeier, D. Lehnherr, P. B. Coto, E. T. Chernick, R. Casillas, B. Basel, M. Thoss, R. R. Tykwinski, D. M. Guldi, Proc. Natl. Acad. Sci. (USA) 2015, 112, 5325.
4. J. Zirzlmeier, R. Casillas, S. R. Reddy, P. B. Coto, D. Lehnherr, E. T. Chernick, I. Papadopoulos, M. Thoss, R. R. Tykwinski, D. M. Guldi, Nanoscale, 2016, 8, 10113.
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.