J
Johannes Frisch
Researcher at Helmholtz-Zentrum Berlin
Publications - 71
Citations - 4021
Johannes Frisch is an academic researcher from Helmholtz-Zentrum Berlin. The author has contributed to research in topics: Paederinae & Work function. The author has an hindex of 30, co-authored 67 publications receiving 3645 citations. Previous affiliations of Johannes Frisch include Humboldt University of Berlin.
Papers
More filters
Journal ArticleDOI
Fluorinated copolymer PCPDTBT with enhanced open-circuit voltage and reduced recombination for highly efficient polymer solar cells.
Steve Albrecht,Silvia Janietz,Wolfram Schindler,Johannes Frisch,Jona Kurpiers,Juliane Kniepert,Sahika Inal,Patrick Pingel,Konstantinos Fostiropoulos,Norbert Koch,Norbert Koch,Dieter Neher +11 more
TL;DR: A novel fluorinated copolymer is introduced and shown to exhibit significantly higher power conversion efficiency in bulk heterojunction solar cells with PC(70)BM compared to the well-known low-band-gap polymer PCPDTBT.
Journal ArticleDOI
Charge-transfer crystallites as molecular electrical dopants
H. Méndez,Georg Heimel,Stefanie Winkler,Stefanie Winkler,Johannes Frisch,Johannes Frisch,Andreas Opitz,Katrein Sauer,Berthold Wegner,Martin Oehzelt,Martin Oehzelt,Christian Röthel,Steffen Duhm,Daniel M. Többens,Norbert Koch,Norbert Koch,Norbert Koch,Ingo Salzmann +17 more
TL;DR: It is demonstrated that fundamentally different processes can occur in the two types of organic semiconductors instead of ground-state integer charge transfer as the basic mechanism of molecular electrical doping in both, conjugated polymers and oligomers.
Journal ArticleDOI
Influence of Aggregation on the Performance of All-Polymer Solar Cells Containing Low-Bandgap Naphthalenediimide Copolymers
Marcel Schubert,Daniel Dolfen,Johannes Frisch,Steffen Roland,Robert Steyrleuthner,Burkhard Stiller,Zhihua Chen,Ullrich Scherf,Norbert Koch,Antonio Facchetti,Dieter Neher +10 more
TL;DR: In this paper, the authors present efficient all-polymer solar cells comprising two different low-bandgap naphthalenediimide (NDI)-based copolymers as acceptors and regioregular P3HT as the donor.
Journal ArticleDOI
Moderate doping leads to high performance of semiconductor/insulator polymer blend transistors
Guanghao Lu,James C. Blakesley,James C. Blakesley,Scott Himmelberger,Patrick Pingel,Patrick Pingel,Johannes Frisch,Ingo Lieberwirth,Ingo Salzmann,Martin Oehzelt,Riccardo Di Pietro,Alberto Salleo,Norbert Koch,Dieter Neher +13 more
TL;DR: It is shown that blends comprising a small amount of semiconducting polymer mixed into an insulating polymer matrix actually perform very poorly in the undoped state, and that mobility and on/off ratio are improved dramatically upon moderate doping.
Journal ArticleDOI
Optically switchable transistor via energy-level phototuning in a bicomponent organic semiconductor
Emanuele Orgiu,Núria Crivillers,Martin Herder,Lutz Grubert,Michael Pätzel,Johannes Frisch,Egon Pavlica,Duc T. Duong,Gvido Bratina,Alberto Salleo,Norbert Koch,Stefan Hecht,Paolo Samorì +12 more
TL;DR: The engineering of an electronic structure in a semiconducting film is reported on by blending two molecular components, a photochromic diarylethene derivative and a poly(3-hexylthiophene) (P3HT) matrix, to attain phototunable and bistable energy levels for the P3HT's hole transport.