Proceedings of Materials for Sustainable Development Conference (MAT-SUS) (NFM22)
DOI: https://doi.org/10.29363/nanoge.nfm.2022.129
Publication date: 11th July 2022
Non-radiative recombination is currently still limiting the efficiency of organic solar cells. A reduction of these losses, inevitably leads to an increase in the electroluminescence quantum efficiency of the devices.[1] We have recently identified small molecule donor-acceptor blends with an optical gap in the visible spectral range, with strongly reduced non-radiative losses and high electroluminescence quantum efficiencies (> 1%) as compared to high efficiency systems with a gap in the near infrared (NIR).[2] As a significant fraction of free carrier recombination in these devices results in the emission of a photon, we have identified time resolved emission spectroscopy at nanosecond to millisecond timescale as an excellent probe for the recombination dynamics and interplay between free carriers, charge transfer states and triplet states. In this talk I will discuss the molecular and morphological factors which are responsible for the efficient charge generation and strongly reduced non-radiative recombination in these high gap systems, and will provide guidelines for future high efficiency devices with reduced voltage losses.
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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.
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