Tobias Bertram

2.4k total citations · 1 hit paper
44 papers, 940 citations indexed

About

Tobias Bertram is a scholar working on Electrical and Electronic Engineering, Materials Chemistry and Atomic and Molecular Physics, and Optics. According to data from OpenAlex, Tobias Bertram has authored 44 papers receiving a total of 940 indexed citations (citations by other indexed papers that have themselves been cited), including 44 papers in Electrical and Electronic Engineering, 38 papers in Materials Chemistry and 13 papers in Atomic and Molecular Physics, and Optics. Recurrent topics in Tobias Bertram's work include Chalcogenide Semiconductor Thin Films (44 papers), Quantum Dots Synthesis And Properties (36 papers) and Semiconductor materials and interfaces (13 papers). Tobias Bertram is often cited by papers focused on Chalcogenide Semiconductor Thin Films (44 papers), Quantum Dots Synthesis And Properties (36 papers) and Semiconductor materials and interfaces (13 papers). Tobias Bertram collaborates with scholars based in Germany, Luxembourg and Austria. Tobias Bertram's co-authors include Christian A. Kaufmann, Rutger Schlatmann, Tim Kodalle, Steve Albrecht, Amran Al‐Ashouri, Susanne Siebentritt, Marko Jošt, Eike Köhnen, Iver Lauermann and Benjamin Lipovšek and has published in prestigious journals such as Applied Physics Letters, Advanced Functional Materials and Scientific Reports.

In The Last Decade

Tobias Bertram

42 papers receiving 931 citations

Hit 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.

Perovskite/CIGS Tandem Solar Cells: From Certified 24.2% toward 30% and Beyond

2022 255 citations Marko Jošt, Eike Köhnen et al. ACS Energy Letters profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Tobias Bertram Germany	14	913	709	140	133	24	44	940
Johannes Löckinger Switzerland	13	964 1.1×	829 1.2×	123 0.9×	182 1.4×	72 3.0×	15	1.0k
Julian Mattheis Germany	10	911 1.0×	713 1.0×	64 0.5×	219 1.6×	32 1.3×	17	945
Johan Verschraegen Belgium	9	812 0.9×	551 0.8×	143 1.0×	192 1.4×	42 1.8×	11	849
Milan Vrućinić United Kingdom	4	643 0.7×	506 0.7×	135 1.0×	91 0.7×	12 0.5×	6	667
Yoshinori Kimoto Japan	7	1.2k 1.3×	1.0k 1.5×	24 0.2×	227 1.7×	31 1.3×	11	1.2k
Xinsheng Liu China	8	581 0.6×	514 0.7×	29 0.2×	85 0.6×	31 1.3×	21	613
Bipanko Kumar Mondal Bangladesh	17	634 0.7×	525 0.7×	46 0.3×	138 1.0×	11 0.5×	42	707
Ruoshui Li China	14	512 0.6×	345 0.5×	258 1.8×	36 0.3×	40 1.7×	40	570
K. Taretto Argentina	16	978 1.1×	505 0.7×	265 1.9×	192 1.4×	51 2.1×	39	1.0k

Countries citing papers authored by Tobias Bertram

Since Specialization

Citations

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

Fields of papers citing papers by Tobias Bertram

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Tobias Bertram

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

All Works

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20 of 20 papers shown

Bertram, Tobias, Klaus Jäger, Nikolaus Weinberger, et al.. (2025). Improving Perovskite/CIGS Tandem Solar Cells for Higher Power Conversion Efficiency through Light Management and Bandgap Engineering. ACS Applied Materials & Interfaces. 17(40). 56250–56255.

Soufiani, Arman Mahboubi, Matthew R. Leyden, M. Szot, et al.. (2025). Sequentially Evaporated Wide Bandgap Perovskite Absorber for Large‐Area and Reproducible Fabrication of Solar Cells. Solar RRL. 9(19).

Jawhari, T., et al.. (2023). Sulfurization of co-evaporated Cu2ZnGeSe4 layers: Influence of the precursor cation's ratios on the properties of Cu2ZnGe(S,Se)4 thin films. Solar Energy Materials and Solar Cells. 254. 112243–112243. 3 indexed citations

Ruske, Florian, Natalia Maticiuc, Tobias Bertram, et al.. (2023). Disentangling the effect of the hole-transporting layer, the bottom, and the top device on the fill factor in monolithic CIGSe-perovskite tandem solar cells by using spectroscopic and imaging tools. Journal of Physics Energy. 5(2). 24014–24014. 4 indexed citations

Levine, Igal, Artem Musiienko, Natalia Maticiuc, et al.. (2023). Advanced Characterization and Optimization of NiO_x:Cu‐SAM Hole‐Transporting Bi‐Layer for 23.4% Efficient Monolithic Cu(In,Ga)Se₂‐Perovskite Tandem Solar Cells. Advanced Functional Materials. 33(34). 38 indexed citations

Bertram, Tobias, Amran Al‐Ashouri, Christian A. Kaufmann, et al.. (2023). Integration of rough RTP absorbers into CIGS-perovskite monolithic tandems by NiOx(:Cu)+SAM Hole-transporting Bi-layers. Solar Energy Materials and Solar Cells. 254. 112248–112248. 21 indexed citations

Bertram, Tobias, Christian A. Kaufmann, Tim Kodalle, et al.. (2022). Effects of material properties of band‐gap‐graded Cu(In,Ga)Se₂ thin films on the onset of the quantum efficiency spectra of corresponding solar cells. Progress in Photovoltaics Research and Applications. 30(10). 1238–1246. 10 indexed citations

Jošt, Marko, Eike Köhnen, Amran Al‐Ashouri, et al.. (2022). Perovskite/CIGS Tandem Solar Cells: From Certified 24.2% toward 30% and Beyond. ACS Energy Letters. 7(4). 1298–1307. 255 indexed citations breakdown →

Maticiuc, Natalia, Tim Kodalle, Tobias Bertram, et al.. (2021). Depth-resolved analysis of the effect of RbF post deposition treatment on CIGSe with two different Cu concentrations. Solar Energy Materials and Solar Cells. 226. 111071–111071. 9 indexed citations

10.

Kodalle, Tim, Tobias Bertram, R. Klenk, et al.. (2021). Elucidating the Effect of the Different Buffer Layers on the Thermal Stability of CIGSe Solar Cells. IEEE Journal of Photovoltaics. 11(3). 648–657. 4 indexed citations

11.

Kodalle, Tim, Tobias Bertram, Marin Rusu, et al.. (2021). Decay mechanisms in CdS‐buffered Cu(In,Ga)Se₂thin‐film solar cells after exposure to thermal stress: Understanding the role of Na. Progress in Photovoltaics Research and Applications. 29(9). 1034–1053. 7 indexed citations

12.

Weinberger, Nikolaus, David Stock, Christian A. Kaufmann, et al.. (2021). Realizing Double Graded CIGSe Absorbers With the R2R Hybrid-CIGSe-Process. IEEE Journal of Photovoltaics. 11(2). 337–344. 1 indexed citations

13.

Weinberger, Nikolaus, Tim Kodalle, Tobias Bertram, et al.. (2021). Phase development in RbInSe2 thin films – a temperature series. Scripta Materialia. 202. 113999–113999. 2 indexed citations

14.

Yun, Jae Ho, Jihye Gwak, Joo Hyung Park, et al.. (2020). Understanding deposition temperature dependent photovoltaic characteristics of Cu(In,Ga)Se2 solar cells: A study with thermally stable alkali aluminosilicate glass substrates. Solar Energy Materials and Solar Cells. 221. 110875–110875. 7 indexed citations

15.

Jošt, Marko, Amran Al‐Ashouri, Benjamin Lipovšek, et al.. (2020). Perovskite/CIGS tandem solar cells - can they catch up with perovskite/c-Si tandems?. 763–766. 12 indexed citations

16.

Weinberger, Nikolaus, David Stock, Christian A. Kaufmann, et al.. (2020). Realizing double graded CIGSe absorbers with the R2R Hybrid-CIGSe-process. 4. 909–912. 1 indexed citations

17.

Kodalle, Tim, et al.. (2020). A Device Model for Rb-Conditioned Chalcopyrite Solar Cells. IEEE Journal of Photovoltaics. 11(1). 232–240. 6 indexed citations

18.

Saifullah, Muhammad, et al.. (2019). Functional Data Analysis of Electrical Measurements on Thin-Film Photovoltaic Devices. IEEE Journal of Photovoltaics. 9(5). 1436–1441. 3 indexed citations

19.

Cueva, Leonor de la, Yudania Sánchez, L. Calvo‐Barrio, et al.. (2018). Sulfurization of co-evaporated Cu2ZnSnSe4 thin film solar cells: The role of Na. Solar Energy Materials and Solar Cells. 186. 115–123. 20 indexed citations

20.

Colombara, Diego, Ulrich Berner, Andrea Ciccioli, et al.. (2017). Deliberate and Accidental Gas-Phase Alkali Doping of Chalcogenide Semiconductors: Cu(In,Ga)Se2. Scientific Reports. 7(1). 43266–43266. 31 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.

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