DOI: https://doi.org/10.29363/nanoge.aohm.2019.015
Publication date: 8th January 2019
Triplet states are commonly observed in most optoelectronic devices that rely on conjugated organic small molecules or polymers. Previously, triplets have often been considered a loss mechanism, but the properties of triplets are now being manipulated in order to achieve beneficial photophysical pathways in conjugated small molecules and polymers, such as photon upconversion, singlet fission, and thermally-activated delayed fluorescence. Despite these recent advances, the properties of conjugated polymer triplets are significantly less well-understood than their singlet counterparts, owing largely to the fact that triplet states are not directly produced upon photoexcitation. As such, key parameters such as triplet absorption cross-sections, quantum yields, population densities, and generation dynamics are much harder to probe accurately. It is therefore vital to establish a greater fundamental understanding of triplet behaviour in such polymers.
In this talk I will cover a couple of examples where the triplet energy levels are manipulated in organic materials and show the consequences of this on the spectroscopy and photophysics. One polymer, for example, has a reduced exchange energy by introducing a large degree of orthogonality to the electron-withdawing moiety, which has the effect of producing a suprisingly high yield of charges, even in solution. Additional examples are a porphyrin-F8BT hybrid polymer in which a dual energy transfer mechanism is active[1], and a small molecule DPP system that, when blended with fullerene, undergoes ultra-fast spin-mixing in a charge transfer state[2].
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.