R
Roar R. Søndergaard
Researcher at Technical University of Denmark
Publications - 73
Citations - 8488
Roar R. Søndergaard is an academic researcher from Technical University of Denmark. The author has contributed to research in topics: Polymer solar cell & Roll-to-roll processing. The author has an hindex of 41, co-authored 73 publications receiving 7772 citations. Previous affiliations of Roar R. Søndergaard include University of Copenhagen.
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Journal ArticleDOI
Photochemical stability of π-conjugated polymers for polymer solar cells: a rule of thumb
Matthieu Manceau,Eva Bundgaard,Jon Eggert Carlé,Ole Hagemann,Martin Helgesen,Roar R. Søndergaard,Mikkel Jørgensen,Frederik C. Krebs +7 more
TL;DR: In this paper, a comparative photochemical stability study of a wide range of π-conjugated polymers relevant to polymer solar cells is presented, and general rules relative to the polymer structure-stability relationship are proposed.
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Fabrication of Polymer Solar Cells Using Aqueous Processing for All Layers Including the Metal Back Electrode
TL;DR: In this paper, it has been argued that the ∼ 8% power conversion effi ciency recently reported for polymer solar cells might challenge polycrystalline silicon when projecting the steady increase in polymer solar cell performance a few years into the future.
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Silver front electrode grids for ITO-free all printed polymer solar cells with embedded and raised topographies, prepared by thermal imprint, flexographic and inkjet roll-to-roll processes
Jong-Su Yu,In Young Kim,Jung-Su Kim,Jeongdai Jo,Thue Trofod Larsen-Olsen,Roar R. Søndergaard,Markus Hösel,Dechan Angmo,Mikkel Jørgensen,Frederik C. Krebs +9 more
TL;DR: It is demonstrated how aqueous nanoparticle based silver inks can be employed as printed front electrodes using several different roll-to-roll techniques, with the flexographic technique currently presenting the fastest processing and the lowest silver use.
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Roll-to-Roll Inkjet Printing and Photonic Sintering of Electrodes for ITO Free Polymer Solar Cell Modules and Facile Product Integration
Dechan Angmo,Thue Trofod Larsen-Olsen,Mikkel Jørgensen,Roar R. Søndergaard,Frederik C. Krebs +4 more
TL;DR: In this article, the authors used roll-to-roll inkjet printing and photonic sintering to produce small polymer solar cell modules that are manufactured without indium-tin-oxide using only roll to roll printing and coating techniques under ambient conditions.
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Fast Inline Roll‐to‐Roll Printing for Indium‐Tin‐Oxide‐Free Polymer Solar Cells Using Automatic Registration
TL;DR: In this paper, a flexible semitransparent substrate for inverted-structure OPVs is presented, which is based on a highconductivity PEDOT:PSS layer and is coated with zinc oxide.