Karl Leo

54.9k total citations · 14 hit papers
816 papers, 45.7k citations indexed

About

Karl Leo is a scholar working on Electrical and Electronic Engineering, Polymers and Plastics and Materials Chemistry. According to data from OpenAlex, Karl Leo has authored 816 papers receiving a total of 45.7k indexed citations (citations by other indexed papers that have themselves been cited), including 701 papers in Electrical and Electronic Engineering, 238 papers in Polymers and Plastics and 179 papers in Materials Chemistry. Recurrent topics in Karl Leo's work include Organic Electronics and Photovoltaics (492 papers), Organic Light-Emitting Diodes Research (308 papers) and Conducting polymers and applications (234 papers). Karl Leo is often cited by papers focused on Organic Electronics and Photovoltaics (492 papers), Organic Light-Emitting Diodes Research (308 papers) and Conducting polymers and applications (234 papers). Karl Leo collaborates with scholars based in Germany, United States and United Kingdom. Karl Leo's co-authors include Björn Lüssem, Martin Pfeiffer, Karsten Walzer, Moritz Riede, Sebastian Reineke, Gregor Schwartz, Malte C. Gather, Lars Müller‐Meskamp, Torsten Fritz and B. Maennig and has published in prestigious journals such as Nature, Science and Chemical Reviews.

In The Last Decade

Karl Leo

789 papers receiving 44.9k citations

Hit Papers

5 papers align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

White organic light-emitting diodes with fluorescent tube efficiency

2009 3.0k citations Sebastian Reineke, Karl Leo et al. profile →
Highly Efficient Organic Devices Based on Electrically Doped Transport Layers

2007 1.3k citations Karl Leo et al. profile →
Highly Conductive PEDOT:PSS Electrode with Optimized Solvent and Thermal Post‐Treatment for ITO‐Free Organic Solar Cells

2011 1.3k citations Karl Leo et al. Advanced Functional Materials profile →
Efficiency Roll‐Off in Organic Light‐Emitting Diodes

2013 974 citations Karl Leo et al. profile →
Triplet-exciton quenching in organic phosphorescent light-emitting diodes with Ir-based emitters

2007 723 citations Sebastian Reineke, Karl Leo et al. profile →
Degradation Mechanisms and Reactions in Organic Light-Emitting Devices

2015 570 citations Karl Leo et al. profile →
Coherent submillimeter-wave emission from Bloch oscillations in a semiconductor superlattice

1993 556 citations Karl Leo et al. profile →
White organic light-emitting diodes: Status and perspective

2013 531 citations Sebastian Reineke, Karl Leo et al. profile →
High-efficiency and low-voltage p-i-n electrophosphorescent organic light-emitting diodes with double-emission layers

2004 523 citations Karl Leo et al. profile →
Doped Organic Transistors

2016 521 citations Karl Leo et al. profile →
Doping of organic semiconductors

2012 497 citations Moritz Riede, Karl Leo et al. profile →
Optical investigation of Bloch oscillations in a semiconductor superlattice

1992 418 citations Karl Leo et al. profile →
Organic Solar Cells—The Path to Commercial Success

2020 397 citations Moritz Riede, Donato Spoltore et al. profile →
Reverse dark current in organic photodetectors and the major role of traps as source of noise

2021 218 citations Jonas Kublitski, Johannes Benduhn et al. Nature Communications profile →

Peers

Countries citing papers authored by Karl Leo

Since Specialization

Citations

This map shows the geographic impact of Karl Leo'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 Karl Leo with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Karl Leo more than expected).

Fields of papers citing papers by Karl Leo

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Karl Leo. 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 Karl Leo. The network helps show where Karl Leo may publish in the future.

Co-authorship network of co-authors of Karl Leo

This figure shows the co-authorship network connecting the top 25 collaborators of Karl Leo. A scholar is included among the top collaborators of Karl Leo based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Karl Leo. Karl Leo is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

#	Work	Indexed citations
1	Molecular Assemblies of Amphiphilic Oligothiophenes at the Air–Water Interface 2025 ·Langmuir ·(unknown), (unknown), (unknown), (unknown), (unknown), (unknown), Joséphine Lai‐Kee‐Him, (unknown), Sébastien Richeter, Indraneel Sen, Karl Leo, Anne‐Laure Biance, Sébastien Clément	0
2	Electron–ion coupling breaks energy symmetry in bistable organic electrochemical transistors 2025 ·SHILAP Revista de lepidopterología ·(unknown), Garrett LeCroy, Tyler J. Quill, (unknown), Gerwin Dijk, Adam Marks, (unknown), Hans Kleemann, Karl Leo, Alberto Salleo	0
3	Tailoring Hole‐Blocking Layers Enables a Versatile Approach for Fast Photomultiplication‐Type Organic Photodetectors 2025 ·Advanced Functional Materials ·(unknown), Yazhong Wang, (unknown), Tianyi Zhang, J. Schröder, Donato Spoltore, Karl Leo, Johannes Benduhn	10
4	Novel Cerium‐Based p‐Dopants with Low Parasitic Absorption for Improved Organic Devices 2025 ·Advanced Science ·(unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), Hans Kleemann, Johannes Benduhn, Frank Ortmann, Karl Leo	2
5	Real‐Time In Vivo Monitoring of Anastomotic Intestinal Ischemia Using Implantable Resorbable Organic Sensors 2025 ·Advanced Science ·(unknown), (unknown), (unknown), (unknown), (unknown), Eberhard Grambow, Brigitte Vollmar, Amelie Zitzmann, Hans Kleemann, Jochen Hampe, Sebastian Hinz, Clemens Schafmayer, Karl Leo	0
6	Doped organic thermoelectric short wavelength infrared detectors 2025 ·Science Advances ·Shu‐Jen Wang, Alexej Pashkin, Ghader Darbandy, (unknown), Jakob Wolansky, (unknown), Zongbao Zhang, Tiffany Wong, (unknown), Yonder Berencén, Johannes Benduhn, Hans Kleemann, Karl Leo	3
7	1D Topological Interface States for Improving Optical Sensors 2024 ·Advanced Optical Materials ·(unknown), (unknown), Sebastian Klembt, Johannes Benduhn, Karl Leo	0
8	Strategies to Control Crystal Growth of Highly Ordered Rubrene Thin Films for Application in Organic Photodetectors 2024 ·Advanced Optical Materials ·(unknown), Jakob Wolansky, Mike Hambsch, Felix Talnack, Eva Bittrich, (unknown), (unknown), Tianyi Zhang, (unknown), (unknown), (unknown), Moritz Riede, (unknown), Johannes Benduhn, Karl Leo	5
9	A hybrid process for integration of organic electrochemical transistors for high uniformity & reliability 2023 ·MRS Communications ·(unknown), Yeohoon Yoon, (unknown), Ali Solgi, Karl Leo, Hans Kleemann	5
10	Highly Crystalline Rubrene Light‐Emitting Diodes with Epitaxial Growth 2023 ·Advanced Functional Materials ·Shu‐Jen Wang, Anton Kirch, (unknown), (unknown), Hans Kleemann, Sebastian Reineke, Karl Leo	11
11	Doped Organic Micro‐Thermoelectric Coolers with Rapid Response Time 2022 ·Advanced Electronic Materials ·Shu‐Jen Wang, (unknown), Heiko Reith, (unknown), Hans Kleemann, Kornelius Nielsch, Karl Leo	10
12	Thermodynamics of organic electrochemical transistors 2022 ·Nature Communications ·Matteo Cucchi, (unknown), (unknown), (unknown), Hsin Tseng, Hans Kleemann, Karl Leo	34
13	Effects of photon recycling and scattering in high-performance perovskite solar cells 2021 ·Science Advances ·Changsoon Cho, Yeoun‐Woo Jang, Seungmin Lee, Yana Vaynzof, Mansoo Choi, Jun Hong Noh, Karl Leo	32
14	Control of Emission Characteristics of Perovskite Lasers through Optical Feedback 2021 ·SHILAP Revista de lepidopterología ·(unknown), Changsoon Cho, (unknown), M. Sūdžius, Martin Kroll, Stefan Meister, Karl Leo	7
15	Enhanced Charge Selectivity via Anodic-C₆₀ Layer Reduces Nonradiative Losses in Organic Solar Cells 2021 ·ACS Applied Materials & Interfaces ·(unknown), Johannes Benduhn, Mathias Nyman, Seyed Mehrdad Hosseini, Jonas Kublitski, Safa Shoaee, Dieter Neher, Karl Leo, Donato Spoltore	9
16	Optimization of Cutting Parameters in Hard Turning of OHNS Steel 2019 ·International Journal of Recent Technology and Engineering (IJRTE) ·(unknown), Karl Leo, (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown)	1
17	Impact of molecular quadrupole moments on the energy levels at organic heterojunctions 2019 ·Nature Communications ·Martin Schwarze, Karl Sebastian Schellhammer, Katrin Ortstein, Johannes Benduhn, Christopher Gaul, Alexander Hinderhofer, Lorena Perdigón‐Toro, Reinhard Scholz, Jonas Kublitski, Steffen Roland, (unknown), Carl Poelking, Denis Andrienko, Gianaurelio Cuniberti, Frank Schreiber, Dieter Neher, Koen Vandewal, Frank Ortmann, Karl Leo	117
18	Effect of H- and J-Aggregation on the Photophysical and Voltage Loss of Boron Dipyrromethene Small Molecules in Vacuum-Deposited Organic Solar Cells 2019 ·The Journal of Physical Chemistry Letters ·Tian‐Yi Li, Johannes Benduhn, Zhi Qiao, Yuan Liu, Yue Li, Rishi Shivhare, Frank Jaiser, Pei Wang, (unknown), Olaf Zeika, Dieter Neher, Stefan C. B. Mannsfeld, Zaifei Ma, Koen Vandewal, Karl Leo	41
19	Boron dipyrromethene (BODIPY) with meso-perfluorinated alkyl substituents as near infrared donors in organic solar cells 2018 ·Journal of Materials Chemistry A ·Tian‐Yi Li, Johannes Benduhn, Yue Li, Frank Jaiser, Donato Spoltore, Olaf Zeika, Zaifei Ma, Dieter Neher, Koen Vandewal, Karl Leo	36
20	Exciton size and binding energy limitations in one-dimensional organic materials 2015 ·The Journal of Chemical Physics ·(unknown), Reinhard Scholz, Felix Plasser, Christian Koerner, Karl Leo	69

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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