Proceedings of 13th Conference on Hybrid and Organic Photovoltaics (HOPV21)
Publication date: 11th May 2021
Organic Solar Cells (OSCs) are continuing to be one of the most promising new generation photovoltaic due its versatility as printable low-cost electronics with lightness, flexibility, low temperature processing, large area coating and roll-to-roll applicability coupled with high power conversion efficiency (PCE) nowadays exceeding 18%. Recently the winning strategy for boosting performances and stability is demonstrated to be the combination of new Non-fullerene acceptor (NFA) materials and Low-Band Gap polymers as donors. Despite the synthesis cost of those new materials, one of the most expensive elements for the technology remains the transparent conductive electrode (TCO) generally consisting in Indium Tin Oxide (ITO).
Here we present a semi-transparent OSCs and its upscaling to mini-module fabricated on flexible graphene-based PET substrate. The bottom graphene electrode was deposited via Chemical Vapour Deposition (CVD) on top of PET substrates while the top semi-transparent electrode was realized by a combination of Molibdenum Oxide (MoOx) and silver (Ag) forming a MoOx/Ag/MoOx (MAM). Reference devices on PET/ITO substrates based on PBDB-T:ITIC donor:acceptor (D:A) couple exibit a maximum PCE of 6% on small area cell (0.1cm2) and 0.7% on 5cm2 module. ITO-free Graphene-based devices shown a PCE of 2.6% on small area and a PCE of 0.3% on 5cm2. This preliminary work shows the potentiality of the graphene as electrode material for new generation photovoltaics due the possibility to be deposited on flexible and large area substrates.
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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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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.
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