Proceedings of 6th International Conference on Hybrid and Organic Photovoltaics (HOPV14)
Publication date: 1st March 2014
Organic Solar Cells(OSC) present favourable properties like transparency, flexibility, ease of processing and colourtenability, making them aptfor new markets such as, consumer product integration properties. However the effect of chemical degradation of the active layer of organic solar cells on the performance of the devices is still poorly understood. In OSC based on P3HT:PCBM, oxygen-induced degradation causing 2% ground state absorption loss leads to a 70% reduction in the short circuit current[1].In this communication we are presenting the irreversible effect of photo-oxidation on charge carrier dynamics of P3HT:PCBM (1:0.8) and Si-PCPDTBT:PCBM (1:2) films at different states of degradation, by analyzing the transient absorption dynamics of the charged statesin the microsecond to millisecond time regime.
Our results indicate that charge recombination dynamics in both P3HT:PCBM and Si-PCPDTBT:PCBM are strongly retarded by photodegradation. In contrast to charge recombination, the charge generation rate is not influenced significantly by weak levels of photodegradation.The retardation in recombination is pointing to a substantial reduction in the effective mobility, which might be due to changes in the morphology of the film.We find thatphoto-degradation reduces the bimolecular recombination rate constant for P3HT:PCBM significantly, but very strongly for Si-PCPDTBT:PCBM. We also observe a significant increase of the background concentration of charge carriers with the level of degradation in bothmaterials, which indicates that the product(s) of photo-oxidation act as electron traps[2]
[1]. Seemann, A,; Sauermann, T.; Lungenschmied, C.; Armbruster, O.; Bauer, S; Egelhaaf, H.-J.;, Hauch, J. Reversible and Irreversible Degradation of Organic Solar Cell Performance by Oxygen. Solar Energy,2010, 85, 1238–1249. [2]Karuthedath, S.; Sauermann, T.; Egelhaaf, H-J.; Wannemacher, R.;, Brabec, C.; Lüer, L. The Effect of Oxygen Induced Degradation on Charge Carrier Dynamics in P3HT:PCBM and Si-PCPDTBT:PCBM Thin Films and Solar Cells. To be submitted, 2014.
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.