Andrej Classen

1.8k total citations · 1 hit paper
18 papers, 1.5k citations indexed

About

Andrej Classen is a scholar working on Electrical and Electronic Engineering, Polymers and Plastics and Materials Chemistry. According to data from OpenAlex, Andrej Classen has authored 18 papers receiving a total of 1.5k indexed citations (citations by other indexed papers that have themselves been cited), including 16 papers in Electrical and Electronic Engineering, 11 papers in Polymers and Plastics and 6 papers in Materials Chemistry. Recurrent topics in Andrej Classen's work include Organic Electronics and Photovoltaics (13 papers), Conducting polymers and applications (11 papers) and Perovskite Materials and Applications (5 papers). Andrej Classen is often cited by papers focused on Organic Electronics and Photovoltaics (13 papers), Conducting polymers and applications (11 papers) and Perovskite Materials and Applications (5 papers). Andrej Classen collaborates with scholars based in Germany, China and United Kingdom. Andrej Classen's co-authors include Christoph J. Brabec, Ning Li, Xiaoyan Du, Thomas Heumueller, Wolfgang Gruber, Tobias Unruh, Thomas Heumüller, Andres Osvet, Iain McCulloch and Larry Lüer and has published in prestigious journals such as Advanced Materials, Nature Communications and The Journal of Chemical Physics.

In The Last Decade

Andrej Classen

18 papers receiving 1.5k citations

Hit Papers

Efficient Polymer Solar Cells Based on Non-fullerene Acce... 2018 2026 2020 2023 2018 100 200 300
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.

  1. Efficient Polymer Solar Cells Based on Non-fullerene Acceptors with Potential Device Lifetime Approaching 10 Years
    2018 395 citations Xiaoyan Du, Thomas Heumueller et al. Joule profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Andrej Classen Germany 14 1.4k 1.1k 196 123 62 18 1.5k
Michelle S. Vezie United Kingdom 9 1.2k 0.9× 896 0.8× 272 1.4× 110 0.9× 105 1.7× 9 1.3k
Quan Liu China 17 740 0.5× 403 0.4× 255 1.3× 120 1.0× 46 0.7× 39 848
Wilson José da Silva Brazil 17 971 0.7× 612 0.5× 351 1.8× 197 1.6× 47 0.8× 34 1.1k
Zhenrong Jia China 17 994 0.7× 646 0.6× 158 0.8× 85 0.7× 127 2.0× 28 1.1k
Wei Gong China 15 1.8k 1.3× 1.2k 1.1× 426 2.2× 109 0.9× 152 2.5× 33 1.9k
Ulrich Hörmann Germany 14 1.4k 1.0× 781 0.7× 507 2.6× 63 0.5× 149 2.4× 19 1.5k
Supravat Karak India 18 1.0k 0.7× 585 0.5× 498 2.5× 89 0.7× 61 1.0× 59 1.2k
Hyeong Pil Kim South Korea 20 1.2k 0.9× 807 0.7× 484 2.5× 165 1.3× 56 0.9× 35 1.3k
Ester Buchaca-Domingo United Kingdom 11 567 0.4× 436 0.4× 165 0.8× 119 1.0× 47 0.8× 13 656
Sunzida Ferdous United States 11 886 0.6× 628 0.6× 297 1.5× 158 1.3× 72 1.2× 12 1.0k

Countries citing papers authored by Andrej Classen

Since Specialization
Citations

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

Fields of papers citing papers by Andrej Classen

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Andrej Classen

This figure shows the co-authorship network connecting the top 25 collaborators of Andrej Classen. A scholar is included among the top collaborators of Andrej Classen 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 Andrej Classen. Andrej Classen is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

18 of 18 papers shown
1.
Du, Xiaoyan, Larry Lüer, Thomas Heumueller, et al.. (2024). Revealing processing stability landscape of organic solar cells with automated research platforms and machine learning. InfoMat. 6(7). 16 indexed citations
2.
Gasparini, Nicola, Franco V. A. Camargo, Tetsuhiko Nagahara, et al.. (2021). Adjusting the energy of interfacial states in organic photovoltaics for maximum efficiency. Nature Communications. 12(1). 1772–1772. 48 indexed citations
3.
Classen, Andrej, et al.. (2021). Negative electron affinity opens quantum well in MgO layers on Ag(100). Journal of Physics Condensed Matter. 34(4). 45001–45001. 2 indexed citations
4.
Classen, Andrej, et al.. (2021). Accelerated lifetime testing of thin‐film solar cells at high irradiances and controlled temperatures. Progress in Photovoltaics Research and Applications. 30(5). 518–527. 10 indexed citations
5.
Classen, Andrej, Christos L. Chochos, Larry Lüer, et al.. (2020). The role of exciton lifetime for charge generation in organic solar cells at negligible energy-level offsets. Nature Energy. 5(9). 711–719. 280 indexed citations
6.
Looney, Erin E., Zhe Liu, Andrej Classen, et al.. (2020). Representative identification of spectra and environments (RISE) using k‐means. Progress in Photovoltaics Research and Applications. 29(2). 200–211. 8 indexed citations
7.
Du, Xiaoyan, Thomas Heumueller, Wolfgang Gruber, et al.. (2020). Unraveling the Microstructure‐Related Device Stability for Polymer Solar Cells Based on Nonfullerene Small‐Molecular Acceptors. Advanced Materials. 32(16). e1908305–e1908305. 185 indexed citations
8.
Liu, Chao, Xiaoyan Du, Shuai Gao, et al.. (2020). A Cross‐Linked Interconnecting Layer Enabling Reliable and Reproducible Solution‐Processing of Organic Tandem Solar Cells. Advanced Energy Materials. 10(12). 29 indexed citations
9.
Classen, Andrej, Thomas Heumueller, Yakun He, et al.. (2019). Revealing Hidden UV Instabilities in Organic Solar Cells by Correlating Device and Material Stability. Advanced Energy Materials. 9(39). 108 indexed citations
10.
He, Yakun, Thomas Heumüller, Wenbin Lai, et al.. (2019). Evidencing Excellent Thermal‐ and Photostability for Single‐Component Organic Solar Cells with Inherently Built‐In Microstructure. Advanced Energy Materials. 9(21). 110 indexed citations
11.
Du, Xiaoyan, Thomas Heumueller, Wolfgang Gruber, et al.. (2018). Efficient Polymer Solar Cells Based on Non-fullerene Acceptors with Potential Device Lifetime Approaching 10 Years. Joule. 3(1). 215–226. 395 indexed citations breakdown →
12.
Xie, Chen, Thomas Heumüller, Wolfgang Gruber, et al.. (2018). Overcoming efficiency and stability limits in water-processing nanoparticular organic photovoltaics by minimizing microstructure defects. Nature Communications. 9(1). 5335–5335. 99 indexed citations
13.
Xie, Chen, Andrej Classen, Andreas Späth, et al.. (2018). Overcoming Microstructural Limitations in Water Processed Organic Solar Cells by Engineering Customized Nanoparticulate Inks. Advanced Energy Materials. 8(13). 47 indexed citations
14.
Classen, Andrej, Thomas Heumueller, Arko Graf, et al.. (2018). Absence of Charge Transfer State Enables Very Low VOC Losses in SWCNT:Fullerene Solar Cells. Advanced Energy Materials. 9(1). 26 indexed citations
15.
Classen, Andrej, et al.. (2017). Interaction of free-base tetraphenylporphyrin with magnesium oxide: Influence of MgO morphology on metalation. The Journal of Chemical Physics. 146(6). 64702–64702. 16 indexed citations
16.
Gasparini, Nicola, Michaël Salvador, Thomas Heumueller, et al.. (2017). Polymer:Nonfullerene Bulk Heterojunction Solar Cells with Exceptionally Low Recombination Rates. Advanced Energy Materials. 7(22). 79 indexed citations
17.
Classen, Andrej, et al.. (2017). Electronic structure of tetraphenylporphyrin layers on Ag(100). Physical review. B.. 95(11). 10 indexed citations
18.
Classen, Andrej, et al.. (1991). Directional solidification with interface dissipation. Physical Review A. 43(12). 6920–6933. 18 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

Breakdown of academic impact, for papers by Michelle S. Vezie Breakdown of academic impact, for papers by Quan Liu Breakdown of academic impact, for papers by Wilson José da Silva Breakdown of academic impact, for papers by Zhenrong Jia Breakdown of academic impact, for papers by Wei Gong Breakdown of academic impact, for papers by Ulrich Hörmann Breakdown of academic impact, for papers by Supravat Karak Breakdown of academic impact, for papers by Hyeong Pil Kim Breakdown of academic impact, for papers by Ester Buchaca-Domingo Breakdown of academic impact, for papers by Sunzida Ferdous
Rankless by CCL
2026