Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV22)
DOI: https://doi.org/10.29363/nanoge.hopv.2022.097
Publication date: 20th April 2022
The conjugated polymer poly(3,4-ethylenedioxythiophene):poly-(styrenesulfonate) (PEDOT:PSS) is certainly one of the main substitute material for indium tin oxide (ITO)-free organic photovoltaic devices. However, PEDOT:PSS films have conductivities two orders of magnitude lower than ITO due the presence of PSS, an insulator polymer added to provide water dispersion to PEDOT. To enhance the electrical performance of the films and overcome the insulator limitations, one promising approach is the use of graphene oxide (GO). The effects of GO:PEDOT:PSS nanocomposites with several PEDOT:PSS proportions were analyzed in regards to the composite molecular structure and ordering, charge transfer dynamics in the femtosecond range, electrical properties and morphology. Charge transfer times at sulfur 1s absorption edge were calculated by the core-hole clock method and the results demonstrate the faster electron delocalization process for the GO:PEDOT:PSS 5% nanocomposite with a value of 3.3 fs, which may be related to the higher homogeneity and ordering of this film, as probed by AFM, SEM, and NEXAFS [1]. Additionally, the effect of thermal treatment of the nanocomposites was also evaluated by surface- and bulk-sensitive NEXAFS, resonant Auger spectroscopy and X-ray photoelectron spectroscopy [2]. GO:PEDOT:PSS 5% offers the best synergetic effect among the blends, a result that is in complete agreement with the electrical measurements.
This research was partially supported by LNLS - National Synchrotron Light Laboratory, Brazil. This study was also supported by CNPq, CAPES, FAPERJ, CT-INFRA FINEP and INCT Nanocarbon.
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.