Proceedings of Online International Conference on Hybrid and Organic Photovoltaics (OnlineHOPV20)
Publication date: 22nd May 2020
The world of organic solar cells (OSC) have been taken by storm by the recent developments in non-fullerene acceptors (NFAs) with record efficiencies being published in close succession. However, not all polymers that previously performed well in fullerene based devices are suitable for use in a blend with NFAs. This seems to be especially the case for diketopyrrolopyrrole (DPP) based polymers and currently there is a lack of understanding as to why. In our research we aim to improve on solar cell performance of DPP-NFA blends and elucidate the reason behind their suboptimal performance in order to extend the range of useful polymers in high efficiency (near infra-red absorbing) NFA OSCs.
We fabricate solar cells from an active layer blend of PDPP5T:IEICO-4F and extensively analyze them using a range of spectral techniques (PL/EL/Abs/SubbandGap-EQE). Then we correct the recorded spectra for suppression or enhancement of the absorption or luminescence as a consequence of thin-film cavity effects. With these corrected spectra in hand, and with the help of morphological analysis tools like TEM/AFM/2D-GIWAXS, we aim to explain the change in device characteristics upon changing the solvent system.
Results regarding the efficiency look promising with over 50% EQE improvement using a ternary solvent system. This solvent system is comprised of chloroform and 1,8-diiodooctane with varying concentrations of chlorobenzene. Current results suggest that the addition of chlorobenzene to the mixture increased stacking efficiency in the IEICO-4F phase, which was reflected in 2D-GIWAXS and the (interference corrected) spectral data, and that this better packing has led to the increase in EQE and the decrease Voc.
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.