Proceedings of 6th International Conference on Hybrid and Organic Photovoltaics (HOPV14)
Publication date: 1st March 2014
Organic photovoltaics (OPV) represent a very promising emerging technology for generation of solar-to-power energy conversion. The great potential of OPV relies on the unique properties of the materials and devices that may benefit from their flexibility, low weight, and freedom of design. The role of the outer contacts is to efficiently extract and collect selectively one charge carrier, either electrons or holes. As a layer selective to electrons a variety of materials can be used. Initially, high work function metals such as Ca or Ba were used but these suffer from low stabilities (1). As a replacement, metal oxides like TiOx or ZnO have been more recently used that show adequate stabilities (2). Here, we have electrically characterized ZnO layers containing different proportions of Aluminum used as dopant with the aim to increase the electrical conductivity. These layers have been electrically characterized by measuring the capacitance-voltage response under three electrode configurations. We observe that the apparent doping density remains very high and similar in all cases but there is a shift in the voltage required to obtain flat bands (Vfb) in the oxide semiconductor. This shifts appears to be related to dipole generation at the ZnO/electrolyte solution being higher the dipole with increasing the proportion of Al. The presence of the dipole should improves the carrier collection in device organic solar cell configuration. Indeed, this increase in the magnitude of the dipole with the Al content translates into a Voc and FF increase in the OPV configuration.
Mott-Schottky analysis of ITO/ZnO electrodes and J-V response in device configuration.
1. Li, G.; Shrotriya, V.; Huang, J.; Yao, Y.; Moriarty, T.; Emery, K.; Yang, Y. Nat. Mater. 2005, 4, 864-868. 2. Waldauf, C.; Morana, M.; Denk, P.; Schilinsky, P.; Coakley, K.; Choulis, S. A.; Brabec, C. J. Appl. Phys. Lett. 2006, 89, 233517-3.
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.