U. Kroll

5.7k citations

107 papers · 4.5k · 1 hit paper · h-index 34

Impact in

Electrical and Electronic Engineering top 0.5%
- Thin-Film Transistor Technologies
- Silicon and Solar Cell Technologies
- Plasma Diagnostics and Applications
- Semiconductor materials and devices
Materials Chemistry top 1%
- Silicon Nanostructures and Photoluminescence
- ZnO doping and properties
- Copper-based nanomaterials and applications

Papers in

Electrical and Electronic Engineering 99
- Thin-Film Transistor Technologies 84
- Silicon and Solar Cell Technologies 75
- solar cell performance optimization 9
- Semiconductor materials and devices 6
- Plasma Diagnostics and Applications 6
Materials Chemistry 63
- Silicon Nanostructures and Photoluminescence 51
- ZnO doping and properties 8

Co-authors: J. Meier (75 shared papers)E. Vallat‐Sauvain (22 shared papers)A. Shah (37 shared papers)S. Faÿ (14 shared papers)N. Wyrsch (12 shared papers)C. Droz (7 shared papers)P. Torres (25 shared papers)M. Vaněček (8 shared papers)
Journals: Thin Solid Films (9 papers)Solar Energy Materials and Solar Cells (8 papers)Journal of Non-Crystalline Solids (6 papers)Journal of Applied Physics (4 papers)Journal of Vacuum Science & Technology A Vacuum Surfaces and Films (4 papers)
Partner nations: Switzerland Germany Czechia

In The Last Decade

U. Kroll

103 papers receiving 4.2k citations

U. Kroll's Hit Papers

align trajectories log scale

Thin‐film silicon solar cell technology 2004 · 551 citations

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if any of the following hold:

it has ≥500 total citations;
it reaches ≥1.5× the top-1% citation threshold for papers in the same subfield and year (the threshold is the minimum needed to enter the top 1%, not the average within it);
it reaches the top citation threshold in at least one of its specific research topics.

2004 Progress in Photovoltaics Research and Applications

Peers

Countries citing papers authored by U. Kroll

Since Specialization

Citations

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

Fields of papers citing papers by U. Kroll

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authors

The 25 scholars most cited alongside U. Kroll, 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 U. Kroll Line = papers co-authored together U. Kroll 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 107 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	Thin‐film silicon solar cell technology Progress in Photovoltaics Research and Applications ·A. Shah, H. Schade, M. Vaněček, J. Meier, E. Vallat‐Sauvain, N. Wyrsch, U. Kroll, C. Droz, J. Bailat Hit paper breakdown →	2004	551
2	Material and solar cell research in microcrystalline silicon Solar Energy Materials and Solar Cells ·Akbar Shah, J. Meier, E. Vallat‐Sauvain, N. Wyrsch, U. Kroll, C. Droz, U. Graf	2003	323
3	Low pressure chemical vapour deposition of ZnO layers for thin-film solar cells: temperature-induced morphological changes Solar Energy Materials and Solar Cells ·S. Faÿ, U. Kroll, C. Bucher, E. Vallat‐Sauvain, A. Shah	2004	261
4	Hydrogen in amorphous and microcrystalline silicon films prepared by hydrogen dilution Journal of Applied Physics ·U. Kroll, J. Meier, Aqeel Ahmed Shah, S. Mikhailov, J. Weber	1996	246
5	On the Way Towards High Efficiency Thin Film Silicon Solar Cells by the “Micromorph” Concept MRS Proceedings ·J. Meier, P. Torres, R. Platz, S. Dubail, U. Kroll, J. A. Anna Selvan, N. Pellaton Vaucher, Ch. Hof, D. Fischer, H. Keppner, A. Shah, K.‐D. Ufert, P. Giannoulès, J. R. Koehler	1996	200
6	Rough ZnO layers by LP-CVD process and their effect in improving performances of amorphous and microcrystalline silicon solar cells Solar Energy Materials and Solar Cells ·S. Faÿ, L. Feitknecht, R. Schlüchter, U. Kroll, E. Vallat‐Sauvain, A. Shah	2006	184
7	Potential of amorphous and microcrystalline silicon solar cells Thin Solid Films ·J. Meier, J. Spitznagel, U. Kroll, C. Bucher, S. Faÿ, T. Moriarty, A. Shah	2004	153
8	Frequency effects in silane plasmas for plasma enhanced chemical vapor deposition Journal of Vacuum Science & Technology A Vacuum Surfaces and Films ·A.A. Howling, J.-L. Dorier, Ch. Hollenstein, U. Kroll, F. Finger	1992	143
9	Device grade microcrystalline silicon owing to reduced oxygen contamination Applied Physics Letters ·P. Torres, J. Meier, R. Flückiger, U. Kroll, J. A. Anna Selvan, H. Keppner, A. Shah, S. D. Littelwood, I. Kelly, P. Giannoulès	1996	143
10	Evolution of the microstructure in microcrystalline silicon prepared by very high frequency glow-discharge using hydrogen dilution Journal of Applied Physics ·E. Vallat‐Sauvain, U. Kroll, J. Meier, Aqeel Ahmed Shah, J. Pohl	2000	124
11	Microcrystalline/micromorph silicon thin-film solar cells prepared by VHF-GD technique Solar Energy Materials and Solar Cells ·J. Meier, E. Vallat‐Sauvain, S. Dubail, U. Kroll, J. Dubail, S. Golay, L. Feitknecht, P. Torres, S. Faÿ, D. Fischer, A. Shah	2001	106
12	Towards very low-cost mass production of thin-film silicon photovoltaic (PV) solar modules on glass Thin Solid Films ·A. Shah, J. Meier, A. Buechel, U. Kroll, J. Steinhauser, Fanny Meillaud, H. Schade, D. Dominé	2005	96
13	Microcrystalline silicon and the impact on micromorph tandem solar cells Solar Energy Materials and Solar Cells ·J. Meier, S. Dubail, S. Golay, U. Kroll, S. Faÿ, E. Vallat‐Sauvain, L. Feitknecht, J. Dubail, Abdul Salam Shah	2002	92
14	Recent progress in micromorph solar cells Journal of Non-Crystalline Solids ·J. Meier, S. Dubail, J. Cuperus, U. Kroll, R. Platz, P. Torres, J. A. Anna Selvan, P. Pernet, N. Beck, N. Pellaton Vaucher, Ch. Hof, D. Fischer, H. Keppner, A. Shah	1998	90
15	Microcrystalline silicon and ‘micromorph’ tandem solar cells Thin Solid Films ·Arvind Shah, J. Meier, E. Vallat‐Sauvain, C. Droz, U. Kroll, N. Wyrsch, J. Guillet, U. Graf	2002	88
16	Nanostructured three-dimensional thin film silicon solar cells with very high efficiency potential Applied Physics Letters ·M. Vaněček, Oleg Babchenko, A. Purkrt, Jakub Holovský, Neda Neyková, A. Poruba, Z. Remeš, J. Meier, U. Kroll	2011	86
17	Influences of a high excitation frequency (70 MHz) in the glow discharge technique on the process plasma and the properties of hydrogenated amorphous silicon Journal of Applied Physics ·F. Finger, U. Kroll, V. Viret, A.H. Shah, W. Beyer, X.-M. Tang, J. Weber, A.A. Howling, Ch. Hollenstein	1992	84
18	Towards high-efficiency thin-film silicon solar cells with the “micromorph” concept Solar Energy Materials and Solar Cells ·J. Meier, S. Dubail, R. Platz, P. Torres, U. Kroll, J. A. Anna Selvan, N. Pellaton Vaucher, Ch. Hof, D. Fischer, H. Keppner, R. Flückiger, A. Shah, Valery Shklover, K.‐D. Ufert	1997	82
19	High rate growth of microcrystalline silicon by VHF-GD at high pressure Thin Solid Films ·U. Graf, J. Meier, U. Kroll, J. Bailat, C. Droz, E. Vallat‐Sauvain, A.H. Shah	2003	79
20	From amorphous to microcrystalline silicon films prepared by hydrogen dilution using the VHF (70 MHz) GD technique Journal of Non-Crystalline Solids ·U. Kroll, J. Meier, P. Torres, J. Pohl, A. Shah	1998	76

About U. Kroll

U. Kroll is a scholar working on Electrical and Electronic Engineering, Materials Chemistry, Atomic and Molecular Physics, and Optics, Renewable Energy, Sustainability and the Environment and Mechanics of Materials, having authored 107 papers that have together received 4.5k indexed citations. Recurring topics across this work include Thin-Film Transistor Technologies (84 papers), Silicon and Solar Cell Technologies (75 papers), Silicon Nanostructures and Photoluminescence (51 papers), solar cell performance optimization (9 papers), ZnO doping and properties (8 papers), Photovoltaic System Optimization Techniques (6 papers), Semiconductor materials and devices (6 papers) and Plasma Diagnostics and Applications (6 papers). The work is most often cited by research in Electrical and Electronic Engineering (4.2k citations), Materials Chemistry (3.2k citations), Surfaces, Coatings and Films (156 citations), Renewable Energy, Sustainability and the Environment (215 citations) and Biomedical Engineering (552 citations). U. Kroll has collaborated with scholars based in Switzerland, Germany and Czechia. Frequent co-authors include J. Meier, E. Vallat‐Sauvain, A. Shah, S. Faÿ, N. Wyrsch, C. Droz, P. Torres, M. Vaněček, J. Bailat and C. Bucher. Their work appears in journals such as Thin Solid Films, Solar Energy Materials and Solar Cells, Journal of Non-Crystalline Solids, Journal of Applied Physics and Journal of Vacuum Science & Technology A Vacuum Surfaces and Films.

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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