Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV19)
DOI: https://doi.org/10.29363/nanoge.hopv.2020.183
Publication date: 6th February 2020
Organic photovoltaics (OPVs) have experienced an impressive performance enhancement over the past few years, recently going beyond the 15% milestone [1]. Current record devices rely on the combination of low-bandgap polymers blended with small acceptor molecules (also called non-fullerene acceptors, NFA). The vast majority of studies in the OPV field follows a traditional Edisonian optimization approach for the optimization of cells based on these systems. This, however, entails manufacturing tens to hundreds of devices in order to optimize the solar cell parameters such as: donor:acceptor ratio, thickness of the active layer, solvent system and thermal annealing. Thus, requiring a large amount of semiconductor materials, time and human resources.
We present a novel gradient methodology [2] based on controlled variation of the parameters of interest allowing to save both resources and research time. This methodology consists in three basic steps. First, donor (low bandgap polymer): acceptor (NFA) composition gradient is produced and measured using RamBIC. This tool extracts the composition and thickness from Raman hyperspectral images, and simultaneously and co-locally determines the photocurrent using the same laser to produce LBIC (laser-beam induced current) images. These images contain typically 10.000 data points. The comparison between images identifies the optimum values for thickness and composition. Then, the RamBIC predictions are double checked (and extended to the rest of the cell parameters) by producing doctor-bladed OPV devices with optimum thickness and composition combinations. Finally, the large dataset are used to train a multi-dataset scientific robot that uses artificial intelligence to try to identify an empirical equation that models all RamBIC data (Figure 1) for different OPV system.
The authors would like to acknowledge financial support from the Ministerio de Economía y Competitividad of Spain through the “Severo Ochoa” Programme for Centres of Excellence in R&D (SEV‐2015‐0496) and project MAT2015‐70850‐P; and the European Research Council (ERC) under grant agreement No. 648901.
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.