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

align trajectories sort by overperformance

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 Björn Lüssem, Karl Leo et al. Nature 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 Yong Hyun Kim, 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 Karl Leo et al. profile →
Degradation Mechanisms and Reactions in Organic Light-Emitting Devices

2015 570 citations Björn Lüssem, 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 Björn Lüssem, 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 Björn Lüssem, Zhenan Bao et al. profile →
Doping of organic semiconductors

2012 497 citations Björn Lüssem, Moritz Riede 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, Andreas Hofacker et al. Nature Communications profile →

Author Peers

Peers are selected by citation overlap in the author's most active subfields. citations · hero ref

Author						Papers	Cites
Karl Leo	39.0k	16.2k	14.5k	6.9k	5.6k	816	45.7k
Henning Sirringhaus	45.2k 1.2×	24.9k 1.5×	13.3k 0.9×	4.5k 0.6×	9.5k 1.7×	398	51.9k
Vladimir Bulović	32.7k 0.8×	7.6k 0.5×	28.9k 2.0×	4.8k 0.7×	6.2k 1.1×	310	42.6k
Donal D. C. Bradley	55.2k 1.4×	35.1k 2.2×	18.5k 1.3×	5.8k 0.8×	7.9k 1.4×	605	64.6k
Paul W. M. Blom	35.9k 0.9×	22.6k 1.4×	10.5k 0.7×	3.7k 0.5×	6.9k 1.2×	453	42.3k
Ifor D. W. Samuel	19.6k 0.5×	7.8k 0.5×	11.6k 0.8×	2.7k 0.4×	3.0k 0.5×	587	25.7k
Paul L. Burn	28.0k 0.7×	17.1k 1.1×	12.9k 0.9×	1.5k 0.2×	2.2k 0.4×	476	32.9k
Thuc‐Quyen Nguyen	27.4k 0.7×	21.1k 1.3×	7.2k 0.5×	1.9k 0.3×	3.3k 0.6×	333	31.9k
Neil C. Greenham	26.2k 0.7×	12.0k 0.7×	14.3k 1.0×	2.9k 0.4×	2.2k 0.4×	304	29.9k
David Beljonne	24.2k 0.6×	10.3k 0.6×	20.1k 1.4×	5.1k 0.8×	6.1k 1.1×	533	39.6k
John E. Anthony	21.7k 0.6×	7.7k 0.5×	9.0k 0.6×	3.2k 0.5×	3.7k 0.7×	405	29.4k

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

Lai‐Kee‐Him, Joséphine, Sébastien Richeter, Indraneel Sen, et al.. (2025). Molecular Assemblies of Amphiphilic Oligothiophenes at the Air–Water Interface. Langmuir. 41(19). 12287–12300.

LeCroy, Garrett, Tyler J. Quill, Gerwin Dijk, et al.. (2025). Electron–ion coupling breaks energy symmetry in bistable organic electrochemical transistors. SHILAP Revista de lepidopterología.

Wang, Yazhong, Tianyi Zhang, J. Schröder, et al.. (2025). Tailoring Hole‐Blocking Layers Enables a Versatile Approach for Fast Photomultiplication‐Type Organic Photodetectors. Advanced Functional Materials. 35(29). 10 indexed citations

Kleemann, Hans, et al.. (2025). Novel Cerium‐Based p‐Dopants with Low Parasitic Absorption for Improved Organic Devices. Advanced Science. 12(14). e2414959–e2414959. 2 indexed citations

Grambow, Eberhard, Brigitte Vollmar, Amelie Zitzmann, et al.. (2025). Real‐Time In Vivo Monitoring of Anastomotic Intestinal Ischemia Using Implantable Resorbable Organic Sensors. Advanced Science. 13(16). e14507–e14507.

Klembt, Sebastian, et al.. (2024). 1D Topological Interface States for Improving Optical Sensors. Advanced Optical Materials. 12(23).

Wolansky, Jakob, Mike Hambsch, Felix Talnack, et al.. (2024). Strategies to Control Crystal Growth of Highly Ordered Rubrene Thin Films for Application in Organic Photodetectors. Advanced Optical Materials. 12(26). 5 indexed citations

Yoon, Yeohoon, et al.. (2023). A hybrid process for integration of organic electrochemical transistors for high uniformity & reliability. MRS Communications. 14(2). 149–157. 5 indexed citations

Cucchi, Matteo, et al.. (2023). Unraveling the Electrochemical Electrode Coupling in Integrated Organic Electrochemical Transistors. Advanced Functional Materials. 33(46). 15 indexed citations

10.

Cucchi, Matteo, et al.. (2022). Thermodynamics of organic electrochemical transistors. Nature Communications. 13(1). 4514–4514. 34 indexed citations

11.

Benduhn, Johannes, Mathias Nyman, Seyed Mehrdad Hosseini, et al.. (2022). Reply to Comment on “Enhanced Charge Selectivity via Anodic-C₆₀ Layer Reduces Nonradiative Losses in Organic Solar Cells”. ACS Applied Materials & Interfaces. 14(6). 7527–7530. 1 indexed citations

12.

Wang, Shu‐Jen, Ghader Darbandy, Felix Talnack, et al.. (2022). Organic bipolar transistors. Nature. 606(7915). 700–705. 59 indexed citations

13.

Ortstein, Katrin, et al.. (2021). New charge-transfer states in blends of ZnPC with F8ZnPC. AIP Advances. 11(2). 4 indexed citations

14.

Cho, Changsoon, et al.. (2021). Control of Emission Characteristics of Perovskite Lasers through Optical Feedback. SHILAP Revista de lepidopterología. 2(12). 7 indexed citations

15.

Leo, Karl, et al.. (2019). Optimization of Cutting Parameters in Hard Turning of OHNS Steel. International Journal of Recent Technology and Engineering (IJRTE). 8(2S3). 43–45. 1 indexed citations

16.

Li, Tian‐Yi, Johannes Benduhn, Zhi Qiao, et al.. (2019). Effect of H- and J-Aggregation on the Photophysical and Voltage Loss of Boron Dipyrromethene Small Molecules in Vacuum-Deposited Organic Solar Cells. The Journal of Physical Chemistry Letters. 10(11). 2684–2691. 41 indexed citations

17.

Schwarze, Martin, Christopher Gaul, Reinhard Scholz, et al.. (2019). Molecular parameters responsible for thermally activated transport in doped organic semiconductors. Nature Materials. 18(3). 242–248. 145 indexed citations

18.

Li, Tian‐Yi, Johannes Benduhn, Yue Li, et al.. (2018). Boron dipyrromethene (BODIPY) with meso-perfluorinated alkyl substituents as near infrared donors in organic solar cells. Journal of Materials Chemistry A. 6(38). 18583–18591. 36 indexed citations

19.

Scholz, Reinhard, et al.. (2015). Exciton size and binding energy limitations in one-dimensional organic materials. The Journal of Chemical Physics. 143(24). 244905–244905. 69 indexed citations

20.

Lee, Jae‐Hyun, Jae‐Hyun Lee, Jonghee Lee, et al.. (2013). Effect of trap states on the electrical doping of organic semiconductors. Organic Electronics. 15(1). 16–21. 25 indexed citations

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.

Explore authors with similar magnitude of impact