Frank Bertram

6.3k citations

192 papers · 5.6k · 1 hit paper · h-index 35

Impact in

Condensed Matter Physics top 0.5%
- GaN-based semiconductor devices and materials
Electronic, Optical and Magnetic Materials top 1%
- Ga2O3 and related materials

Papers in

Condensed Matter Physics 142
- GaN-based semiconductor devices and materials 142
Electronic, Optical and Magnetic Materials 82
- Ga2O3 and related materials 79

Co-authors: Jürgen H. Christen (138 shared papers)A. Hoffmann (31 shared papers)J. Christen (26 shared papers)Daniel F. Förster (12 shared papers)Bertrand Meyer (10 shared papers)Martin Straßburg (6 shared papers)Ute Haboeck (4 shared papers)D.M. Hofmann (3 shared papers)
Journals: Applied Physics Letters (34 papers)Journal of Crystal Growth (21 papers)physica status solidi (b) (20 papers)Journal of Applied Physics (11 papers)Japanese Journal of Applied Physics (8 papers)
Partner nations: Germany United States Japan

In The Last Decade

Frank Bertram

190 papers receiving 5.4k citations

Frank Bertram's Hit Papers

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Bound exciton and donor–acceptor pair recombinations in ZnO 2004 · 1.5k citations

What are hit papers?

Paper score: A paper's citations measured against the top-1% bar of its own field and year: the square root of citations ÷ bar, so 1 means right at the bar and 2 means four times its citations. The bar blends the citation counts that enter the top 1% of the paper's subfields in its year (weighted 89.5%), of those subfields over all years (0.5%) and of its year across all fields (10%); a subfield and year with fewer than 400 papers takes its year's bar. Papers from 2026 are not scored yet: in an unfinished year, when a paper appeared matters more than how it is cited.

Hit paper: A paper cited at least 1.5× the top-1% bar of its field and year: a paper score of at least √1.5.

2004 physica status solidi (b)

Peers

Countries citing papers authored by Frank Bertram

Since Specialization

Citations

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

Fields of papers citing papers by Frank Bertram

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authors

The 25 scholars most cited alongside Frank Bertram, 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 Frank Bertram Line = papers co-authored together Frank Bertram links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

Showing the 20 most-cited of 192 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	Bound exciton and donor–acceptor pair recombinations in ZnO physica status solidi (b) ·Bertrand Meyer, Helder R. Alves, D.M. Hofmann, Wilhelm Kriegseis, Daniel F. Förster, Frank Bertram, J. Christen, A. Hoffmann Hit paper breakdown →	2004	1464
2	The thickness of native oxides on aluminum alloys and single crystals Applied Surface Science ·Jonas Evertsson, Frank Bertram, Fan Zhang, Lisa Rullik, Lindsay Richard Merte, Mikhail Shipilin, Markus Soldemo, Seyed Mohammad Ahmadi	2015	192
3	Optical and structural analysis of ZnCdO layers grown by metalorganic vapor-phase epitaxy Applied Physics Letters ·Th. Gruber, C. Kirchner, Rainer Kling, Friedrich Reuß, Andreas Waag, Frank Bertram, Daniel F. Förster, Jürgen H. Christen	2003	166
4	Gallium gradients in Cu(In,Ga)Se2thin-film solar cells Progress in Photovoltaics Research and Applications ·Wolfram Witte, Daniel Abou‐Ras, Karsten Albe, Gottfried Heinrich Bauer, Frank Bertram, Christian Boit, R. Brüggemann, Jürgen H. Christen	2014	140
5	Strain relaxation and strong impurity incorporation in epitaxial laterally overgrown GaN: Direct imaging of different growth domains by cathodoluminescence microscopy and micro-Raman spectroscopy Applied Physics Letters ·Frank Bertram, Till Riemann, Jürgen H. Christen, A. Kaschner, A. Hoffmann, C. Thomsen, Kotaro Hiramatsu, T. Shibata	1999	133
6	MOVPE growth of GaN on Si(111) substrates Journal of Crystal Growth ·Armin Dadgar, M. Poschenrieder, J. Bläsing, Oscar Edel Contreras, Frank Bertram, Till Riemann, A. Reiher, M. Kunze	2002	124
7	Metalorganic chemical vapor phase epitaxy of gallium‐nitride on silicon Physica status solidi. C, Conferences and critical reviews/Physica status solidi. C, Current topics in solid state physics ·Armin Dadgar, André Strittmatter, J. Bläsing, M. Poschenrieder, Oscar Edel Contreras, Peter Veit, Till Riemann, Frank Bertram	2003	113
8	Optical investigations of AlGaN on GaN epitaxial films Applied Physics Letters ·G. Steude, Bertrand Meyer, Axel Göldner, A. Hoffmann, Frank Bertram, Jürgen H. Christen, Hiroshi Amano, Isamu Akasaki	1999	95
9	Laser‐Interference Lithography Tailored for Highly Symmetrically Arranged ZnO Nanowire Arrays Small ·Dong-Sik Kim, Ran Ji, Hong Jin Fan, Frank Bertram, Roland Werner Scholz, Armin Dadgar, Kornelius Nielsch, A. Krost	2006	93
10	Fabrication, Self-Assembly, and Properties of Ultrathin AlN/GaN Porous Crystalline Nanomembranes: Tubes, Spirals, and Curved Sheets ACS Nano ·Yongfeng Mei, Dominic J. Thurmer, Christoph F. Deneke, Suwit Kiravittaya, Yuanfu Chen, Armin Dadgar, Frank Bertram, Barbara Bastek	2009	86
11	MOVPE growth of high-quality AlN Journal of Crystal Growth ·Armin Dadgar, A. Krost, J. Christen, Barbara Bastek, Frank Bertram, A. Krtschil, Thomas Hempel, J. Bläsing	2006	78
12	Vertical strain and doping gradients in thick GaN layers Applied Physics Letters ·Henrik Siegle, A. Hoffmann, Ludger Eckey, C. Thomsen, Jürgen H. Christen, Frank Bertram, Daniel Schmidt, Dirk Rudloff	1997	74
13	Group III nitride core–shell nano‐ and microrods for optoelectronic applications physica status solidi (RRL) - Rapid Research Letters ·Martin Mandl, Xue Wang, Tilman Schimpke, Christopher Kölper, Michael Binder, Johannes Ledig, Andreas Waag, Xiang Kong	2013	72
14	Comprehensive Comparison of Various Techniques for the Analysis of Elemental Distributions in Thin Films Microscopy and Microanalysis ·Daniel Abou‐Ras, R. Caballero, Ch.‐H. Fischer, Christian Alexander Kaufmann, Iver Lauermann, Roland Mainz, Harry Mönig, A. Schöpke	2011	70
15	On the nature of the 3.41 eV luminescence in hexagonal GaN Journal of Crystal Growth ·Stefan Fischer, G. Steude, D.M. Hofmann, Fritz Kurth, F. Anderš, Michael Topf, Bertrand Meyer, Frank Bertram	1998	68
16	Three‐dimensional GaN for semipolar light emitters physica status solidi (b) ·Thomas Wunderer, Martin Feneberg, Frank Lipski, J. Wang, Robert A. R. Leute, Stephan Schwaiger, K. Thonke, Andrey L. Chuvilin	2010	60
17	Low Stokes shift in thick and homogeneous InGaN epilayers Applied Physics Letters ·Sahana Srinivasan, Frank Bertram, A. Bell, Fernando Ponce, Shinji Tanaka, H. Omiya, Yasuaki Nakagawa	2002	55
18	Direct imaging of phase separation in ZnCdO layers Applied Physics Letters ·Frank Bertram, S. Giemsch, Daniel F. Förster, Jürgen H. Christen, Rainer Kling, C. Kirchner, Andreas Waag	2006	53
19	Optical microscopy of electronic and structural properties of epitaxial laterally overgrown GaN Applied Physics Letters ·A. Kaschner, A. Hoffmann, C. Thomsen, Frank Bertram, Till Riemann, Jürgen H. Christen, Kotaro Hiramatsu, T. Shibata	1999	52
20	Self-assembly of ZnO nanowires and the spatial resolved characterization of their luminescence Nanotechnology ·Hong Jin Fan, Frank Bertram, Armin Dadgar, Jürgen H. Christen, A. Krost, Margit Zacharias	2004	49

About Frank Bertram

Frank Bertram is a scholar working on Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Materials Chemistry, Atomic and Molecular Physics, and Optics and Mechanics of Materials, having authored 192 papers that have together received 5.6k indexed citations. Recurring topics across this work include GaN-based semiconductor devices and materials (142 papers), ZnO doping and properties (82 papers), Ga2O3 and related materials (79 papers), Semiconductor Quantum Structures and Devices (65 papers), Metal and Thin Film Mechanics (38 papers), Semiconductor materials and devices (27 papers), Nanowire Synthesis and Applications (16 papers) and Quantum Dots Synthesis And Properties (14 papers). The work is most often cited by research in Condensed Matter Physics (2.5k citations), Electronic, Optical and Magnetic Materials (2.3k citations), Materials Chemistry (3.8k citations), Electrical and Electronic Engineering (2.3k citations) and Atomic and Molecular Physics, and Optics (1.1k citations). Frank Bertram has collaborated with scholars based in Germany, United States and Japan. Frequent co-authors include Jürgen H. Christen, A. Hoffmann, J. Christen, Daniel F. Förster, Bertrand Meyer, Martin Straßburg, Ute Haboeck, D.M. Hofmann, Wilhelm Kriegseis and Helder R. Alves. Their work appears in journals such as Applied Physics Letters, Journal of Crystal Growth, physica status solidi (b), Journal of Applied Physics and Japanese Journal of Applied 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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Frank Bertram's Hit Papers

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