557 citations · 3.9k across the 41 of their papers we have counts for
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Semiconductor Room-Temperature Maser
Andreas Gottscholl, Maximilian Wagenhöfer, Valentin Baianov +3
We report the first demonstration of a semiconductor maser based on silicon vacancies (VSi) in 4H-silicon carbide (SiC). Using an active feedback loop, we enhance the resonator's q…
Understanding the Role of Triplet-triplet Annihilation in Non-fullerene Acceptor Organic Solar Cells
Lucy J. F. Hart, Jeannine Grüne, Wei Liu +15
Non-fullerene acceptors (NFAs) have enabled power conversion efficiencies exceeding 19% in organic solar cells (OSCs). However, the open-circuit voltage of OSCs remains low relativ…
Photophysics of Deep Blue Acridane- and Benzonitrile-Based Emitter Employing Thermally Activated Delayed Fluorescence
Nikita A. Drigo, Liudmila G. Kudriashova, Sebastian Weissenseel +4
We designed and synthesized a new organic light-emitting diode (OLED) emitter, SBABz4, containing spiro-biacridine donor (D) in the core surrounded by two benzonitrile acceptors (A…
Combining optical and magnetic resonance spectroscopies to probe charge recombination via triplet excitons in organic solar cells
Alberto Privitera, Jeannine Grune, Akchheta Karki +7
Organic solar cells (OSCs) have recently shown a rapid improvement in their performance, bringing power conversion efficiencies (PCEs) closer to the point where commercial applicat…
Thermal Activation Bottleneck in TADF OLEDs based on m-MTDATA:BPhen
Nikolai Bunzmann, Douglas L. Baird, Hans Malissa +4
Organic light emitting diodes (OLEDs) based on thermally activated delayed fluorescence (TADF) can be highly efficient because of the conversion of non-radiative triplet to radiati…
Kinetic Modeling of Transient Electroluminescence reveals TTA as Efficiency-Limiting Process in Exciplex-Based TADF OLEDs
Jeannine Grüne, Nikolai Bunzmann, Moritz Meinecke +2
Organic light emitting diodes (OLEDs) based on thermally activated delayed fluorescence (TADF) show increased efficiencies due to efficient upconversion of non-emissive triplet sta…