557 citations · 3k across the 40 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…
Detecting triplet states in opto-electronic and photovoltaic materials and devices by transient optically detected magnetic resonance
Jeannine Grüne, Vladimir Dyakonov, Andreas Sperlich
Triplet excited states in organic semiconductor materials and devices are notoriously difficult to detect and study with established spectroscopic methods. Yet, they are a crucial…
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…
Charge Transfer in Ternary Solar Cells Employing Two Fullerene Derivatives: Where do Electrons Go?
Andreas Sperlich, Michael Auth, Vladimir Dyakonov
Earlier reports demonstrated that ternary organic solar cells (OSC) made of donor polymers (D) blended with different mixtures of fullerene acceptors (A:A) performed very similarly…