N. Karl

3.3k citations

60 papers · 2.7k indexed · 1 hit paper · h-index 26

Impact in

Physical and Theoretical Chemistry top 1%
- Photochemistry and Electron Transfer Studies
Electronic, Optical and Magnetic Materials top 5%
- Organic and Molecular Conductors Research

Papers in

Physical and Theoretical Chemistry 13
- Photochemistry and Electron Transfer Studies 7
- Crystallography and molecular interactions 6
Atomic and Molecular Physics, and Optics 27
- Spectroscopy and Quantum Chemical Studies 9
- Advanced Chemical Physics Studies 8

Co-authors: U. Zimmermann Takashi Kobayashi Wilhelm Warta H. Cailleau M. H. Lemée-Cailleau F. Moussa Bertrand Toudic Frank Schreiber
Journals: Journal of Crystal Growth (4 papers)Physical review. B, Condensed matter (4 papers)Chemical Physics Letters (4 papers)Thin Solid Films (3 papers)The Journal of Chemical Physics (2 papers)
Partner nations: Germany France United States

In The Last Decade

N. Karl

59 papers receiving 2.6k citations

Hit Papers

align trajectories log scale

Charge carrier transport in organic semiconductors 2003 · 509 citations

Peers

Countries citing papers authored by N. Karl

Since Specialization

Citations

This map shows the geographic impact of N. Karl's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by N. Karl with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites N. Karl more than expected).

Fields of papers citing papers by N. Karl

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by N. Karl. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by N. Karl. The network helps show where N. Karl may publish in the future.

Co-authorship network

The 25 scholars most cited alongside N. Karl, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with N. Karl Line = papers co-authored together N. Karl links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

#	Work
1	Direct evidence of lattice-relaxed charge transfer exciton strings Europhysics Letters (EPL) ·Éric Collet, M. H. Lemée-Cailleau, Marylise Buron‐Le Cointe, H. Cailleau, S. Ravy, Tadeusz Luty, J. F. Bérar, P. Czarnecki, N. Karl	2002	32
2	NEXAFS and ARUP Spectroscopy of an Organic Single Crystal: α-Perylene Molecular crystals and liquid crystals science technology. Section A, Molecular crystals and liquid crystals ·U. Zimmermann, Kristen N. Oliveira, L Regis, N. Karl, R. Dudde, E.E. Koch, E. Umbach	2000	13
3	Thermodynamics of the Neutral-to-Ionic Transition as Condensation and Crystallization of Charge-Transfer Excitations Physical Review Letters ·M. H. Lemée-Cailleau, Edward M. Harris, H. Cailleau, Tadeusz Luty, F. Moussa, J. Roos, D. Brinkmann, Bertrand Toudic, C. Ayache, N. Karl	1997	106
4	Fermi level determination in organic thin films by the Kelvin probe method Journal of Applied Physics ·Martin Pfeiffer, Karl Leo, N. Karl	1996	59
5	Non-Sinusoidal Structure of the 1:1 Complex of Phenothiazine and 7,7,8,8-Tetracyanoquinodimethane Acta Crystallographica Section C Crystal Structure Communications ·L. Toupet, N. Karl	1995	6
6	The Role of Excitonic Light Collection, Exciton Diffusion to Interfaces, Internal Fields for Charge Separation, and High Charge Carrier Mobilities Molecular crystals and liquid crystals science technology. Section A, Molecular crystals and liquid crystals ·N. Karl, Luke Arend, Sa Xue, Jörg Marktanner, Nicholas Daniel Pardosi, Clive Thomsen	1994	39
7	Structural aspects of the neutral-to-ionic transition in an organic charge-transfer crystal: TTF-chloranil Ferroelectrics ·M. H. Lemée-Cailleau, Bertrand Toudic, H. Cailleau, F. Moussa, Edward M. Harris, Gilles Silly, N. Karl	1992	7
8	Organic Crystals I: Characterization N. Karl	1991	14
9	Studies of Organic Semiconductors for 40 Years—III Molecular Crystals and Liquid Crystals Incorporating Nonlinear Optics ·N. Karl	1989	17
10	Epitaxial growth of thin films of perylenetetracar☐ylic dianhydride and coronene on NaCl(001) Thin Solid Films ·(unknown), M. Schreck, N. Karl	1989	26
11	Singularity-nonsingularity surface transitions of vapour-grown highest purity diphenyl crystals Journal of Crystal Growth ·D. Nenow, A. Pavlovska, N. Karl	1984	13
12	Mobilities of electrons and holes in naphthalene and perdeuterated naphthalene Chemical Physics Letters ·L. B. Schein, Wilhelm Warta, A. R. McGhie, N. Karl	1983	10
13	2:1 donor–acceptor complex between acridine and pyromellitic dianhydride at approx. 120 K Acta Crystallographica Section B ·N. Karl, Ai Li Wang, M. C. Manifold, John J. Stezowski	1982	2
14	Computer-Assisted Orientation of Low Symmetry Crystals Molecular crystals and liquid crystals ·N. Karl, H. Port, Wolfgang Schrof	1981	7
15	Purification, growth, structure, optical and electrical properties of single crystals of the π-molecular complex of phenothiazine with pyromellitic dianhydride The Journal of Chemical Physics ·Ralph E. Luker, N. Karl, B. E. Robertson, John J. Stezowski	1980	21
16	Absorption spectrum of the tetracene monopositive ion in the anthracene lattice physica status solidi (a) ·N. Karl, 透大津	1976	10
17	Energy Levels of Electron and Hole Traps in the Band Gap of Doped Anthracene Crystals physica status solidi (a) ·Karen Bofill, N. Karl	1975	71
18	Charge-transfer-absorption, CT-emission- and ESR-spectroscopy with zone-refined crystals of anthracene-pyromellitic dianhydride Chemical Physics Letters ·D. Haarer, N. Karl	1973	49
19	Field Dependent Losses of Electrons and Holes by Bimolecular Volume Recombination in the Excitation Layer of Anthracene Single Crystals Studied by Drift Current Pulses physica status solidi (a) ·N. Karl, Gerald Sommer	1971	13
20	Bestimmung der Diffusionskonstante von Leitungselektronen in Anthracen aus dem Impulsabfall bei Driftexperimenten Zeitschrift für Naturforschung A ·N. Karl, E. Schmid, M. Seeger	1970	24

About N. Karl

N. Karl is a scholar working on Physical and Theoretical Chemistry, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Surfaces, Coatings and Films and Electrochemistry, having authored 60 papers that have together received 2.7k indexed citations. Recurring topics across this work include Solid-state spectroscopy and crystallography (12 papers), Organic and Molecular Conductors Research (11 papers), Spectroscopy and Quantum Chemical Studies (9 papers), Organic Electronics and Photovoltaics (8 papers), Advanced Chemical Physics Studies (8 papers), Photochemistry and Electron Transfer Studies (7 papers), Molecular Junctions and Nanostructures (6 papers) and Crystallography and molecular interactions (6 papers). The work is most often cited by research in Physical and Theoretical Chemistry (347 citations), Electronic, Optical and Magnetic Materials (677 citations), Polymers and Plastics (440 citations), Electrical and Electronic Engineering (1.7k citations) and Atomic and Molecular Physics, and Optics (825 citations). N. Karl has collaborated with scholars based in Germany, France and United States. Frequent co-authors include U. Zimmermann, Takashi Kobayashi, Wilhelm Warta, H. Cailleau, M. H. Lemée-Cailleau, F. Moussa, Bertrand Toudic, Frank Schreiber, D. Haarer and Jörg Marktanner. Their work appears in journals such as Journal of Crystal Growth, Physical review. B, Condensed matter, Chemical Physics Letters, Thin Solid Films and The Journal of Chemical Physics.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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