827 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of WürzburgDE69 papers
- TU WienAT8 papers
- Center for Applied Energy ResearchDE7 papers
- Technical University of MunichDE6 papers
- Friedrich-Alexander-Universität Erlangen-NürnbergDE5 papers
- Institute of High Energy PhysicsCN5 papers
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran SassoIT5 papers
- Max Planck Institute for PhysicsDE5 papers
- University of CoimbraPT5 papers
- University of OxfordGB5 papers
- University of TübingenDE5 papers
- Walther Meissner InstituteDE5 papers
58 papers · 1 filter
Competing excitonic couplings as origin of mimicked phase transitions in zinc-phthalocyanine single crystals
Lisa Schraut-May, Sebastian Hammer, Luca Nils Philipp +9
The optical properties of molecular crystals are largely determined by the excitonic coupling of neighboring molecules. This coupling is extremely sensitive to the arrangement of a…
Surface doping of rubrene single crystals by molecular electron donors and acceptors
Christos Gatsios, Andreas Opitz, Dominique Lungwitz +9
The surface molecular doping of organic semiconductors can play an important role in the development of organic electronic or optoelectronic devices. Single-crystal rubrene remains…
Spectroscopic analysis of vibrational coupling in multi-molecular excited states
Sebastian Hammer, Theresa Linderl, Kristofer Tvingstedt +2
Multi-molecular excited states accompanied by an intra- and inter-molecular geometric relaxation are commonly encountered in optical and electrooptical studies and applications of…
Orbital-resolved Observation of Singlet Fission
Alexander Neef, Samuel Beaulieu, Sebastian Hammer +8
Singlet fission may boost photovoltaic efficiency [by transforming a singlet exciton into two triplet excitons and thereby doubling the number of excited charge carriers. The prima…
Spin-split bands cause the indirect band gap of (CHNH)PbI: Experimental evidence from circular photogalvanic effect
Daniel Niesner, Martin Hauck, Shreetu Shrestha +7
Long carrier lifetimes and diffusion lengths form the basis for the successful application of the organic-inorganic perovskite (CHNH)PbI in solar cells and lasers. The…
Temperature-dependent optical spectra of single-crystal (CHNH)PbBr cleaved in ultrahigh vacuum
Daniel Niesner, Oskar Schuster, Max Wilhelm +6
We measure temperature-dependent one-photon and two-photon induced photoluminescence from (CH3NH3)PbBr3 single crystals cleaved in ultrahigh vacuum. An approach is presented to ext…
Optical thermometry based on level anticrossing in silicon carbide
A. N. Anisimov, D. Simin, V. A. Soltamov +4
We report a giant thermal shift of MHz/K related to the excited-state zero-field splitting in the silicon vacancy centers in 4H silicon carbide. It is obtained from the ind…
Locking of electron spin coherence over fifty milliseconds in natural silicon carbide
D. Simin, H. Kraus, A. Sperlich +3
We demonstrate that silicon carbide (SiC) with natural isotope abundance can preserve a coherent spin superposition in silicon vacancies over unexpectedly long time approaching 0.1…
All-optical dc nanotesla magnetometry using silicon vacancy fine structure in isotopically purified silicon carbide
D. Simin, V. A. Soltamov, A. V. Poshakinskiy +10
We uncover the fine structure of a silicon vacancy in isotopically purified silicon carbide (4H-SiC) and find extra terms in the spin Hamiltonian, originated from the trigon…
High precision vector magnetometry with uniaxial quantum centers in silicon carbide
D. Simin, F. Fuchs, H. Kraus +4
We show that uniaxial color centers in silicon carbide with hexagonal lattice structure can be used to measure not only the strength but also the polar angle of the external magnet…
Encounter-Limited Charge Carrier Recombination in Phase Separated Organic Semiconductor Blends
Michael C. Heiber, Christoph Baumbach, Vladimir Dyakonov +1
The theoretical effects of phase separation on encounter-limited charge carrier recombination in organic semiconductor blends are investigated using kinetic Monte Carlo (KMC) simul…
Anisotropic electron mobility studies on Cl2-NDI single crystals and the role of static and dynamic lattice deformations upon temperature variation
Nis Hauke Hansen, Falk May, Daniel Kälblein +9
The anisotropic electron transport in the (001) plane of sublimation-grown Cl-NDI (naphthalene diimide) single crystals is analysed over a temperature range between 175 K and…
Room-temperature near-infrared silicon carbide nanocrystalline emitters based on optically aligned spin defects
A. Muzha, F. Fuchs, N. V. Tarakina +8
Bulk silicon carbide (SiC) is a very promising material system for bio-applications and quantum sensing. However, its optical activity lies beyond the near infrared spectral window…
Engineering near infrared single photon emitters in ultrapure silicon carbide
F. Fuchs, B. Stender, M. Trupke +3
Quantum emitters hosted in crystalline lattices are highly attractive candidates for quantum information processing, secure networks and nanosensing. For many of these applications…
Persistent photovoltage in methylammonium lead iodide perovskite solar cells
A. Baumann, K. Tvingstedt, M. C. Heiber +4
Open circuit voltage decay measurements are performed on methylammonium lead iodide (CH3NH3PbI3) perovskite solar cells to investigate the charge carrier recombination dynamics. Th…
Nongeminate recombination in neat P3HT and P3HT:PCBM blend films
Julien Gorenflot, Michael C. Heiber, Andreas Baumann +5
The slow decay of charge carriers in polymer-fullerene blends measured in transient studies has raised a number of questions about the mechanisms of nongeminate recombination in th…
Excitation and recombination dynamics of vacancy-related spin centers in silicon carbide
T. C. Hain, F. Fuchs, V. A. Soltamov +4
We generate silicon vacancy related defects in high-quality epitaxial silicon carbide layers by means of electron irradiation. By controlling the irradiation fluence, the defect co…
Magnetic field and temperature sensing with atomic-scale spin defects in silicon carbide
H. Kraus, V. A. Soltamov, F. Fuchs +5
Quantum systems can provide outstanding performance in various sensing applications, ranging from bioscience to nanotechnology. Atomic-scale defects in silicon carbide are very att…
Effects of Characteristic Length Scales on the Exciton Dynamics in Rubrene Single Crystals
Björn Gieseking, Teresa Schmeiler, Benjamin Müller +4
As for its inorganic counterparts the future developments in organic electronics are driven by an advanced device miniaturization. Therefore, the opto-electronic behavior of up-to-…
Highly-Efficient Charge Separation and Polaron Delocalization in Polymer-Fullerene Bulk-Heterojunctions: A Comparative Multi-Frequency EPR & DFT Study
Jens Niklas, Kristy L. Mardis, Brian P. Banks +8
The ongoing depletion of fossil fuels has led to an intensive search for additional renewable energy sources. Solar-based technologies could provide sufficient energy to satisfy th…
Probing exciton interaction with a spatially defined charge accumulation layer in the organic semiconductor Diindenoperylene
N. H. Hansen, C. Wunderlich, A. K. Topczak +1
We present an investigation of the microscopic interplay between excitons and charge carriers by means of combined photoluminescence (PL) and charge carrier transport measurements…
Order of Decay of Mobile Charge Carriers in P3HT:PCBM Solar Cells
Carsten Deibel, Daniel Rauh, Alexander Foertig
The charge carrier dynamics of organic solar cells are strongly influenced by trapping and allow to draw conclusions on the loss mechanisms limiting the photovoltaic performance. I…
Intrinsic defects in silicon carbide LED as a perspective room temperature single photon source in near infrared
F. Fuchs, V. A. Soltamov, S. Vaeth +4
Generation of single photons has been demonstrated in several systems. However, none of them satisfies all the conditions, e.g. room temperature functionality, telecom wavelength o…
Resonant addressing and manipulation of silicon vacancy qubits in silicon carbide
D. Riedel, F. Fuchs, H. Kraus +7
Several systems in the solid state have been suggested as promising candidates for spin-based quantum information processing. In spite of significant progress during the last decad…